情态动词基础练习题

中考情态动词基础单选40题1.You finish your homework before you watch TV.A.mustB.canC.mayD.could答案：A。

“must”表示必须，在这里强调在看电视之前必须完成作业，是一种强烈的要求。

“can”表示能够，“may”表示可能，“could”表示过去的能够或委婉的请求，这三个选项都没有“必须”的意思强烈。

2.We go to the park if it doesn't rain tomorrow.A.mustB.canC.willD.should答案：B。

“can”在这里表示可能性，即如果明天不下雨我们就能够去公园。

“must”表示必须，“will”表示将来会，“should”表示应该，都不符合此语境。

3.She speak three languages.A.canB.mayC.mustD.should答案：A。

“can”表示能力，她能够说三种语言。

“may”表示可能，“must”表示必须，“should”表示应该，都不能表达她具有说三种语言的能力。

4.You borrow books from the library.A.canB.mustC.shouldD.need答案：A。

“can”表示可以，即你可以从图书馆借书。

“must”表示必须，“should”表示应该，“need”表示需要，都不符合此语境。

5.I be late for school today. I got up late.A.mayB.mustC.canD.should答案：A。

“may”表示可能，因为起晚了所以可能会迟到。

“must”表示必须，“can”表示能够，“should”表示应该，都不太符合此语境。

6.We take an umbrella. It might rain later.A.mustB.canC.shouldD.may答案：C。

“should”在这里表示应该，因为可能会下雨所以应该带伞。

高中英语语法练习-情态动词一、基础练习1.He ___ have completed his work; otherwise, he wouldn't be enjoying himself by the seaside.A. shouldB. mustC. wouldn'tD. can't2. I _____ have been more than six years old when the accident happened.A. shouldn'tB. couldn'tC. mustn'tD. needn't3. This cake is very sweet. You ____ a lot of sugar in it.A. should putB. could have putC. might putD. must have put4. He paid for a seat, when he ____ have entered free.A. couldB. wouldC. mustD. need5. I was on the highway when his car went past followed by a police car. They ____ at least 150 kilometers an hour.A. should have been doingB. must have been doingC. could have doneD. would have done6. — Tom is never late for work. Why is he absent today?— Something __________ to him.A. must happenB. should have happenedC. could have happenedD. must have happened7. - Do you know where David is? I couldn't find him anywhere.- Well. He _______ have gone far-his coat is still here.A. shouldn'tB. mustn'tC. can'tD. wouldn't8. -Lucy doesn't mind lending you her dictionary.- She __________. I've already borrowed one.A. can'tB. mustn'tC. needn'tD. shouldn't9. - Catherine, I have cleaned the room for you.- Thanks. You _____ it. I could manage it myself.A. needn't doB. needn't have doneC. mustn't doD. shouldn't have done10. There________ be any difficulty in passing the road test since you have practised a lot in the driving school.A. mustn'tB. shan'tC. shouldn'tD. needn't11. - The woman biologist stayed in Africa studying wild animals for 13 years before she returned.-Oh, dear! She ________ a lot of difficulties!A. may go thoughB. might go throughC. ought to have gone throughD. must have gone though12. -I've taken someone else's green sweater by mistake.-It ______ Harry's. He always wears green.A. has to beB. will beC. mustn't beD. could be13. Helen _______ go on the trip with us, but she isn't quite sure yet.A. shallB. mustC. mayD. can14. If I ________ plan to do anything I wanted to, I'd like to go to Tibet and travelthrough as much of it as possible.A. wouldB. could C have to D. ought to15. You might just as well tell the manufacturer that male customers_____ not like the design of the furniture.A. mustB. shallC. mayD. need16. -Who is the girl standing over there?- Well, if you ______ know, her name is Mabel.A. mayB. canC. mustD. shall17. Children under 12 years of age in that country______ be under adult supervisionwhen in a public library.A. mustB. mayC. canD. need18. "The interest ______ be divided into five parts, according to the agreement madeby both sides," declared the judge.A. mayB. shouldC. mustD. shall19. -- I'll tell Mary about her new job tomorrow.--You _______ her last week.A. ought to tellB. would have toldC. must tellD. should have told20. I ______ pay Tom a visit, but I'm not sure whether I will have time this Sunday.A. shouldB. mightC. wouldD. could21. --I don't mind telling you what I know.--You ________. I'm not asking you for it.A. mustn'tB. may notC. can'tD. needn't22. --Excuse me, but I want to use your computer to type a report.--You________ have my computer if you don't take care of it.A. shan'tB. might notC. needn'tD. shouldn't23. --Excuse me. Is that the right way to the Summer Palace?--Sorry, I'm not sure, but it ______ be.A. mightB. willC. mustD. can24. --Mum, I've been studying English since 8 o'clock. ________ I go out and playwith Tom for a while?--No, I'm afraid not. Besides, it's raining outside now.A. can'tB. wouldn'tC. may notD. won't25. I often see lights in that empty house. Do you think I _____report it to the police?A. shouldB. mayC. willD. can26. Mr. White_______ at 8:30 for the meeting, but he didn't show up.A. should have arrivedB. should arriveC. should have had arrivedD. should be arriving27. You ________ be tired-you've only been working for an hour.A. must notB. won'tC. can'tD. may not二、提高练习1．--- Shall I tell John about it?--- No, you ______. I’ve told him already.A. needn’ｔB. wouldn’ｔC. mustn’ｔD. shouldn’ｔ2. --- There were already five people in the car, but they managed to take me as well.--- It ______ a comfortable journey.A. can’t beB. shouldn’t beC. mustn’t have beenD. couldn’t have been3. --- Why didn’t you come to see me?--- I ______, but I was too busy yesterday.A. like toB. should like toC. would like to haveD. am going to-behaved gentleman ______ be so rude to a lady.4. You can’t imagine that a wellA. mightB. needC. shouldD. would5. There was plenty of time; she ______.A. mustn’t have hurriedB. needn’t have hurriedC. may not have hurriedD. wouldn’t have hurried6. --- Is John coming by air?--- He should, but ______ not. He likes taking trains.A. mustB. canC. needD. may7. --- ______ it be Li Ping who broke the glass?--- No. It ______ be Wang Hai who did it.A. Could; mayB. Can; canC. May; mustD. Can; must8. When the old man was alive, he ______ sit for hours at the door.A. wouldB. couldC. mustD. might9. Jack, you ______ play with the knife; you ______ hurt yourself.A. won’t; can’ｔB. mustn’t; mayC. shouldn’t; mustD. can’t; should10. I’ve decided to take the job and I ______ change my mind.A. mustn’ｔB. can’ｔC. won’ｔD. may not11. She ______ into the thick forest alone on such a dark night.A. dares not goB. dares not to goC. dare not to goD. doesn’t dare to go12. My parents never remember my telephone number, and they always ______ look it up.A. mustB. canC. shouldD. have to13. --- Where is Jack? I can’t find him anywhere.--- He ______ his homework upstairs.A. might have doneB. must have doneC. might be doingD. must do14. He ______ you more help, even though he was very busy.A. might have givenB. might giveC. may have givenD. may give15. --- If he ______, he ______ that food.--- Luckily he was sent to the hospital immediately.A. was warned; would not takeB. had been warned; would not have takenC. would be warned; had not takenD. would have been warned; had not taken16. --- I hear you've got a set of valuable Australian coins. ____I have a look ?--- Yes, certainly.A. DoB. MayC. ShallD. Should17. — When can I come for the photos? I need them tomorrow afternoon.。

三年级英语情态动词基础单选题40题1.I_____read many books.A.canB.couldC.mayD.must答案：A。

本题考查情态动词的用法。

“can”表示能力，“could”表示过去的能力，三年级学生一般是现在的能力，所以选“can”。

“may”表示可能，“must”表示必须，不符合题意。

2.We_____play games in the classroom.A.canB.couldC.can'tD.couldn't答案：C。

在教室里不能玩游戏，“can't”表示不能。

“can”和“could”表示能，不符合语境。

“couldn't”是过去不能，也不符合。

3.She_____sing very well.A.canB.couldC.mayD.might答案：A。

表示她有唱歌的能力用“can”。

“could”表示过去的能力，“may”和“might”表示可能，不符合题意。

4.They_____draw pictures in art class.A.canB.couldC.mustD.should答案：A。

在美术课上能画画用“can”表示能力。

“could”过去的能力，“must”必须，“should”应该，都不符合。

5.I_____help you with your homework.A.canB.couldC.mayD.might答案：A。

表示我有帮助你做作业的能力用“can”。

“could”过去的能力，“may”和“might”表示可能，不符合。

6.We_____listen to the teacher carefully.A.canB.couldC.mustD.should答案：C。

在学校里必须认真听老师讲课，用“must”。

“can”和“could”表示能力，“should”应该，都不符合。

7.She_____speak English and Chinese.A.canB.couldC.mayD.might答案：A。

情态动词can的用法专项练习I.基础练习一、把下列句子变为否定句can ride a horse well.2. He can take pictures.and Chenjie can play the piano.father can play basketball.5. My brother could go cycling five years ago.二、把下列句子变为一般疑问句并作肯定和否定回答。

can play basketball well.mother can play the piano.and Chenjie can take pictures.can clean the room.5. She could use the InternetII.能力提升根据要求完成下列各题can play football.(改为否定句)2. Zhangpeng can ride a horse.(一般疑问句)3. I can ride a bike .(用two years ago 改写)4. My sister can do housework.(划线部分提问)5. I can play the violin . (划线部分提问)6. My father could use the Internet.①改为否定句②改为一般疑问句并作否定回答巩固练习1. 迈克会说英语，但她不会说汉语。

Mike ____ ____ English ,__ _she _____speak Chinese.2. 你的朋友会骑马吗------会。

______ your friends ____ ____ ____ Yes , _____ can.3. 那个女孩不会打羽毛球。

The girl ______ ______ badminton..4. Amy 会游泳吗------不会。

______ Amy ______ No , she ______.5. 他们会弹钢琴。

初中英语情态动词专项练习（附答案解析）一、单选题1．—Must I hand in the homework right now?—That's the rule.A．Yes, you can.B．No, you can't.C．Yes, you must.D．No, you mustn't.1．答案C解析句意：—我必须现在交作业吗？—这是规则。

是的,，你必须。

A. Yes,you can.“是的,你能”；B. No,you can't.“不,你不能”；C. Yes,you must.“是的,你必须”；D. No,you mustn't.“不,你禁止”。

回答must引导的一般疑问句，肯定用must，表示"必须"。

故选C。

点评考查情态动词引导的一般疑问句的回答，掌握情态动词must的用法。

2．You don't look well, you __________ see the doctor.A．ought to B．may C．can D．Might 2．答案A解析句意：你看起来不好，你应该去看看医生。

根据“看起来不好”可以得知是应该去。

A. ought to “应该”；B. may “可能”；C. can“ 会”；D. might“可能”。

故选A。

点评考查情态动词，区分ought to；may ；can和might的含义和应用。

3．What a beautiful day! You ______ take your umbrella at all.A．needn't B．mustn't C．can't D．may not 3．答案A解析句意：多好的天气啊!你根本不需要带伞。

A. needn't “不必”；B. mustn't“禁止”；C. can't“不可能”；D. may not“或许不会”。

情态动词基础练习题一、单项选择情态动词1．—You rang me up at about 10:00 last night, didn't you?—No, I didn't phone you. It someone else.A．must have been B．could be C．must be D．could have been 【答案】A【解析】【详解】考查情态动词+have done。

句意：“昨晚10点左右你给我打了电话，是吗？”“不，我没给你打电话。

一定是别人干的。

” must have done 是对过去发生的动作最有把握的猜测，意思是“一定”，结合语境可知，我没有打电话给你，因此猜测一定有别人给你打了电话。

故选A 项。

2．Keep up your spirits even if you _____ fail hundreds of times.A．must B．needC．may D．should【答案】C【解析】【详解】考查情态动词。

A. must必须；B. need需要；C. may可能，或许；D. should应该。

句意：即使失败了几百次，也要振作起来。

此处表示一种不确定的推测，故选C。

3．Using AI， many companies are now conducting experiments that__________ possible just a few years ago．A．would have been B．might have beenC．shouldn't have been D．couldn't have been【答案】D【解析】【详解】考查情态动词表推测。

句意：很多公司现在使用人工智能进行试验，这在几年前是不可能的。

根据“a few years ago”可知，此处表示“过去不可能”，应该用couldn’t have done，故D 项正确。

一．用can 填空四情态动词Can 专项练习（基础题）1. He run .2. He jump.3. He sing.4. He write.5. He read.11.I run .13.His sister jump.15.Supergirl sing.17.He write.19.It read.6.She dive.7.She fly.8.She paint.9.She dance.10.She cook.12.My mother dive. 14.Sam fly.16.Kitty paint.18.Our teacher dance.20.Tom cook.二．选择题1.Can you a model ship for him? A.makes B.make C.making2.—Can you and answer my questions?--Yes,sir. A.stand up. B.stand down. C sit down.3.Can you English? A.say B. speak C .tell4.—How can you ?---I can go by bus. A.go there B.go to there C. get bus6. Can you me the way to Jack’s house? A.know B.show C.say7. Nancy can cakes for her sister. A.makes B. making C.make8. You can bus No.6 at the next stop.A. takeB.goC.by（拔高题）将下列句子变为一般疑问句，并作肯定与否定回答。

1.He can run.2.She can jump.3.They can swim.4.You can dance.5.He can write.6.She can sing.7.It can play. 8.They can talk.9.She can read. 10.He can fly.11.You can dive. 12.It can draw.13.They can skate. 14.He can paint.15.We can dance. 16.We can swim.17.My mother can write. 18.My father can sing. 19.Our sister can play. 20.Our friends can talk. 21.She can fly. 22.Kitty can read.23.My daddy can dive. 24.Her mommy can draw.。

中考英语情态动词推测基础单选题40题1. Mary is not in the classroom. She ______ be in the library.A. mayB. mustC. can'tD. needn't答案：A。

本题中，Mary 不在教室，她有可能在图书馆，“may”表示可能性较小的推测，“must”表示肯定的推测，“can't”表示否定的推测，意思是“不可能”，“needn't”表示“不必”，根据语境，A 选项最合适。

2. The coat on the chair looks like yours. It ______ be yours.A. mightB. mustC. can'tD. should答案：A。

椅子上的外套看起来像你的，有较小的可能是你的。

“might”表示可能性较小，“must”是肯定推测，“can't”是否定推测，“should”表示“应该”，这里A 选项更符合。

3. There is someone knocking at the door. It ______ be Tom.A. mayB. mustC. can't答案：A。

有人敲门，有可能是Tom。

“may”表示可能性不大的猜测，“must”是很肯定的猜测，“can't”是不可能，“could”也可以表示可能性，但语气比“may”稍弱，综合语境选A。

4. Jack isn't at home. He ______ be playing football outside.A. mayB. mustC. can'tD. ought to答案：A。

Jack 不在家，他可能在外面踢足球。

“may”表示不太确定的推测，“must”是非常确定，“can't”是不可能，“ought to”是应该，这里 A 选项更恰当。

5. The girl has a smile on her face. She ______ be very happy.A. mayB. mustC. can'tD. would答案：A。

中考情态动词基础单选20题(答案解析)1. You _____ finish your homework before you watch TV.A.mustB.shouldC.canD.may答案：A。

must 表示“必须”，在这里强调看电视之前必须先完成作业。

should 表示“应该”，语气没有must 强烈。

can 表示“能够”，may 表示“可能”，这两个选项不符合语境。

2. —May I use your pen?—Sure. Here you are. But you _____ return it after class.A.mustB.canC.mayD.should答案：A。

must 在这里表示“必须”，借了东西后必须在课后归还。

can 表示“能够”，may 表示“可能”，should 表示“应该”，这三个选项不如must 更能体现必须归还的意思。

3. You _____ be careful when you cross the road.A.mustB.shouldC.canD.may答案：A。

must 表示“必须”，过马路时必须小心。

should 表示“应该”，语气不如must 强烈。

can 表示“能够”，may 表示“可能”，不符合语境。

4. —Could I borrow your dictionary?—Yes, you _____. But you must return it on time.A.canB.shouldC.mustD.may答案：A。

could 表示委婉的请求，回答用can。

should 表示“应该”，must 表示“必须”，may 表示“可能”，不符合语境。

5. We _____ respect our teachers and parents.A.mustB.shouldC.canD.may答案：A。

must 表示“必须”，我们必须尊重老师和父母。

号顿市安谧阳光实验学校情态动词练习部分一、基础训练1）单项选择1. You ___ hand it in at once, you may hand it in tomorrow.(A) needn't (B) may not (C) can't (D) must not2. "That must be a mistake." "No it ___ a mistake."(A) must not be (B) needn't be (C) cannot be (D) would not be3. You ___ go now. It's getting late.(A) had rather (B) would (C) had better (D) would4. Since the bus is crowded, we ___.(A) had better walk to home (B) have better walk home(C) had better walk home (D) had better to walk home5. "You ___ come in now, Mary! It's getting cold!" “I ___ go on playing in the garden."(A) had better...had better (B) would rather...had better(C) had better...would rather (D) had better...would have better6. When I was a boy, I ___ chocolate.(A) would like (B) was used to like (C) should like (D) used to like 7. I wasn't supposed to go to the movies, but I ___ myself.(A) cannot help (B) couldn't but (C) had to help (D) couldn't help8. Looking at my determined face, the big boy ___ pick up the fight.(A) dares not (B) dare not (C) doesn't dare (D) dares not to9. He began to write two hours ago. He ___ have finished the article now.(A) must (B) ought (C) ought to (D) had to10. You ___ to the meeting this afternoon if you have something important to do.(A) needn't to come (B) don't need come (C) don't need coming(D)needn't come11. ___ you be here at eight o'clock tomorrow morning?(A) Would (B) Should (C) Can (D) Could12. ___ I have a talk with the Party Secretary now?(A) Will (B) Did (C) May (D) Can13. "You ___ read that article if you don’t want to.”(A) needn't (B) mustn’t (C) haven't (D) can’t14. When the storm comes all windows ___.(A) ought to close (B) ought to be closing (C) ought to be closed (D) ought to closed15. I ___ me what happened.(A) would like you tell (B) would like you to tell(C) would like you telling (D) would like you that you tell16. I hope you can visit my country soon, because___ toshow you someof the beautiful places near my home.(A) I like (B) I'd like (C) I will like(D) I shall like17. She ___ for yesterday's test, but she didn’t.(A)should have studied (B) would study (C) might be studying (D)must have studied18. He ___ breakfast at eight o'clock when he lived alone. But nowadays he ___ it at seven.(A) was used to have ... is having (B) was used to having ...is having(C) used to have ... has (D) used to having ...was19. In the old society Grandpa Zhou ___ to work long hours a day.(A) was working (B) was having (C) had (D) has20. Everybody ___ in bed.(A) has to spend some time (B) have to spend some time(C) has to spend sometimes (D) have to spend sometimes2) 选择合适的词或词组填空1. I have a headache. I __________ take an aspirin.(had better; would better)2. He looks sleepy. He must __________ bed very late last night. (go; have gone)3. I want to go to the office, but you __________ with me.(need not to go; need not go)4. I ought __________ those books to the library last week.(to have taken; to take)5. The mother is telling her son, “You __________ eat with your fingers!”(wouldn’t; mustn’t)6. He was a good swimmer so he _______ swim to the river bank when theboat sank. (was able to; could)7. To travel from England to Scotland you __________ a passport.(don’t need; needn’t)8. He went on foot, but he __________ by bus.(ought have gone; should have gone)9. A: Did Ken take the job in the bookstore?B: No, but I think he __________.(must have; should have)10. He __________ talk for hours, if you let him.(can; will)11. You __________ use this toothbrush, it’s mine.(may not; shall not)12. No matter what people say, I __________ do as I like.(shall; will)13. “I’m willing to let you take whatever you like.”Means “you ______take whatever you like.” (shall; will)14. A: I haven’t felt well for a week.B: You __________ see a doctor.(had better; should have to)15. A: He is late, __________ he have missed the bus?B: Yes, he must have missed the bus.(Can; Must)二、强化练习1) 选择填空1. I didn’t see her in the meeting room this morning. She _____ at the meeting.A. mustn’t have spokenB. shouldn’t have spokenC. needn’t have spokenD. couldn’t have spoken2. One ought _____ for what one hasn’t done.A. not to be punishedB. to not be punishedC. to not punishedD. not be punished 3. If you really want yourself to be in good health, you must ___ always ___ so much.A. not; be smokingB. not; have smokedC. not; to smokeD. be not; smoking4. With so much work on hand, you _____ to see the game last night.A. mustn’t goB. shouldn’t goC. couldn’t have goneD. shouldn’t have gone5. Most of the students felt rather disappointed at the English party. They say that it ______ better organized.A. had beenB. had to beC. must have beenD. could have been6. I’m surprised that he _____ in the exam.A. should failB. would have failedC. may have failedD. should have failed7. The little girl _____ there alone.A. not dare goB. dares not goC. dare not goD. dare not to go8. “Must we do it now?” “No, you _____.”A. won’tB. needn’tC. can’tD. don’t9. He said he would rather not _____ it right now.A. doingB. to doC. doD. to be doing10. You _____ to the meeting this afternoon if you have somethingimportant to do.A. needn’t to comeB. don’t need comeC. don’t need comingD. needn’t come11. Put on more clothes. You _____ be feeling cold with only a shirt on.A. canB. couldC. wouldD. must12. I _____ play football than baseball.A. would ratherB. had betterC. like betterD. prefer13. I thought you _____ like something to read, so I have brought you some books.A. mayB. mightC. couldD. must14. There was plenty of times. She _____.A. mustn’t have hurriedB. couldn’t have hurriedC. must not hurryD. needn’t have hurried15. The plant is dead. I _____ it more water.A. will giveB. would have givenC. must giveD. should have given16. You _____ return the book now. You can keep it till next week if you like.A. can’tB. mustn’tC. needn’tD. may not 17. It’s still early, you _____.A. mustn’t hurryB. wouldn’t hurryC. may not hurryD. don’t have to hurry18. Please open the window, _____?A. can’t youB. aren’t youC. do youD. will you19. We _____ for her because she never came.A. mustn’t have waitedB. shouldn’t have waitedC. mustn’t waitD. needn’t wait20. — May I stop here? — No, you _____.A. mustn’tB. might notC. needn’tD. won’t21. It’s a fine day. Let’s go fishing, _____.A. won’t weB. will weC. don’t weD. shall we22. I didn’t see her in the meeting room this morning. She _____ at the meeting.A. mustn’t have spokenB. shouldn’t have spokenC. needn’t have spokenD. couldn’t have spoken23. — Please don’t make a noise.— _____. I’ll be as quiet as a mouse.A. Yes, I won’tB. No, I won’tC. No, I willD. Yes,I will24. The young man has made so much noise that he _____ not have been allowed to attend the concert.A. couldB. mustC. wouldD. should25. — Where is John? — He _____ in the library.A. should beB. must beC. can beD. must have been26. Since the road is wet this morning, _____ last night.A. it must rainB. it must be rainingC. it must have rainedD. it must have been rain27. — Will your brother stay home tonight?—I’m not quite sure. He _____ to the cinema tonight.A. must goB. can goC. may goD. may be going28. She’s already two hours late. What ______ to her?A. can have happenedB. may have happenedC. should have happenedD. must happen29. You must be a writer, _____? A. mustn’t you B. are you C. must you D. aren’t you30. I got up early that morning, but I _____ so because I had no work to do.A. mustn’t have doneB. didn’t need to doC. needn’t have doneD. can’t have done31. He _____ have come here yesterday, but he didn’t.A. couldB. shouldC. ought toD. all the above32. I missed the last bus, so I _____ go home on foot.A. mustB. have toC. mayD. had to33. He ought to win the first prize, _____ he?A. oughtn’tB. shouldn’tC. mustn’tD. both A and B34. Everyone _____ do his best for the modernizations of our country.A. canB. mayC. shouldD. might35. Let’s clean our classroom, _____?A. will youB. don’t weC. shall weD. do you36. Let us play basketball, ______?A. will youB. don’t weC. shall weD. do you37. He asked me for this book many times. Please tell him that he _____ have it tomorrow.A. mustB. mayC. shallD. both B and C38. “Your phone number again? I _____ quite catch it.”“I t’s 9568442.”A. didn’tB. couldn’tC. don’tD. can’t39. Mother _____ us stories when we were children.A. was used to tellB. is used to tellingC. used to tellD. used to telling40. She would rather _____ more money on books _____ on clothes.A. cost … notB. to spare … don’tC. pay … thanD. spend …than2）强化练习题1) You____ all those clothes! We have a washing machine to do that sort of thing.A) needn't have washed B) shouldn't have washedC) must not have washed D) can not have washed2) John's score on the test is the highest in the class; he____ last night.A) should study B) should have studiedC) must have studied D) must have to study3) The room is in a terrible mess; it ____cleaned.A) can't have been B) shouldn't have beenC) mustn't have been D) wouldn't have been4) Nobody knows how people first came to these islands. They ____ from South America on rafts.A) must have sailed B) can sail C) might have sailed D) should have sailed 5) Mary was not in her bedroom yesterday afternoon. She ____ in her classroom.A) should have been B) must have been C) must be D) should be 6) Bob said he was going to join our club but he didn't. He ____ his mind.A) can't have changed B) wouldn't have changedC) must have changed D) shouldn't have changed7) You____ to town to see the film yesterday. It will be on TV tonight.A) needn't go B) had better not go C) should not go D) needn't have gone8) We____ the letter yesterday, but it didn't arrive.A) must receive B) ought to receiveC) must have received D) ought to have received9) With all the work on hand, he____ to the cinema last night.A) mustn't go B) shouldn't have gone C) could not go D) couldn't have gone10) Eve was late for class again. She ____earlier.A) should get up B) must get up C) need to get up D) should havegot up11) I am feeling sick. I____ so much chocolate.A) needn't have eaten B) couldn't have eatenC) mustn't have eaten D) shouldn't have eaten12) I didn't send out my application form last week, but I ____.A) had B) would do C) should have D) might have to13) Walking alone in the deserted village, John was scared. He thoughthe____ Tom to go with him.A) might have asked B) should asked C) must have asked D) should have asked14) When I got to the cinema, the film had already started; I____ there earlier.A) ought to get B) ought to have got C) must have got D) must get15) The road was muddy. It____ last night.A) must rained B) must have rained C) must be rained D) could have rained16) She can speak quite fluent English. She____.A) must been in the U.S.A. for some timeB) must have been in the U.S.A. for some timeC) should have been in the U.S.A. for some timeD) May be in the U.S.A. for some time 17) You should bear in mind that he is not so strong as he____.A) was used to be B) used to be C) was used to D) use to18)“We didn't see him at the exhibition yesterday.”“He ___it.”A) mustn't visit B) can't have visited C) should have gone to seeD) may see19) Mary ____my letter, otherwise she would have replied before now.A) should have received B) has receivedC) couldn't have received D) ought to have received20) I ____ you a valuable present for your birthday, but I was short of money.A) would have liked to give B) liked to giveC) have liked to give D) would like to give21)“Where ____ my umbrella?”“Somebody ____ it away by mistake.”A) is, must have taken B) is, must takeC) have been, must take D) is, takes22) What ____ would happen if the director knew you felt that way?A) will you suppose B) you supposeC) do you suppose D) you would suppose23) Two eyes ____see more than one.A) can B) may C) will D) should24) ____ you continue in your efforts and achieve new and greater successes.A) Would B) Will C) May D) Should25) We ought to help each other in our work, ____?A) oughtn't we B) should we C) shouldn't we D) ought to we26) Tom ____ better than to ask Dick for help.A) shall know B) shouldn't know C) has known D) should have known27) You ____ your tooth pulled out before it rot completely.A) had better got B) had to get better C) had better to get D) had better get28) When we got to the cinema, the film hasn't started yet, so we ____.A) needn't hurry B) didn't need hurryC) needn't to hurry D) needn't have hurried29) It was really very dangerous; you ____ him seriously.A) might have injured B) could injureC) should have injured D) must injure30) As he had heart attack, he was told that he ____ continue the work.A) needn't B) may not C) mustn't D) can't31) An Englishman who ____not speak Italian was once traveling in Italy.A) must B) could C) may D) might32) I ____like to make a suggestion.A) could B) would C) must D) might 33) I know things are hard with you, but you ____try to get over the difficulties.A) can B) may C) must D) ought34 I can't find the recorder in the room. It ____ by somebody.A) may have been taken away B) may leaveC) may take away D) must have taken away35) He ____the 9:20 train because he didn't leave home till 9:25.A) can reach B) could catch C) may not catch D) couldn't have caught3) 单句改错（先判断句子是否正确，正确的句子不需改动。

情态动词练习题及答案一、选择题根据句意，选择正确的情态动词填空。

1. We _______ go hiking tomorrow if the weather is good.A. mayB. wouldC. willD. can2. She _______ have passed the exam. She studied very hard.A. mightB. canC. wouldD. must3. _______ I borrow your pen, please?A. MustB. CouldC. ShouldD. Will4. He _______ swim when he was only five years old.A. couldB. mayC. mightD. would5. You _______ eat too much junk food. It's bad for your health.A. mightB. shouldC. canD. would二、填空题根据句意，用适当的情态动词填空。

1. You _______ call the doctor. You don't look well.2. I _______ have forgotten to lock the door. I'll go back and check.3. _______ I go to the party with you? I don't have any other plans.4. They _______ be late for the meeting. It starts in 10 minutes.5. He _______ play the guitar very well when he was young.三、改错题找出每句中的错误并改正。

完整版英语情态动词基础练习题含答案一、选择题1．You'd better __________ hard from now on, __________ you will fail the exam. A．work; and B．working; or C．working; and D．work; or 2．—Will your mother be at home this Saturday?—Hard to say. She _______go to the countryside to see my grandparents.A．must B．may C．can D．would 3．—May I have some wine to drink?—No, you ________. You have to drive home later.A．mustn’t B．needn’t C．can’t D．may not4．—________ I see your ID card? We have to check your personal information.—Sure. Here you are.A．May B．Need C．Should D．Must5．You ________ drive after drinking alcohol(酒). It’s against the law.A．mustn’t B．needn’t C．couldn’t D．wouldn’t6．—I think they are enough. We ________ make so many chairs.—I don’t think so. Because nearly a quarter of t hem need ________.A．don’t need to; mending B．needed; to be mendedC．don’t need; mend D．need; to mend7．We teenagers ________ have dreams. With dreams and hard work, anything amazing________ be created.A．may; can B．might; should C．should; can D．must; has to 8．—Who’s singing next door? Is it Miss Wang?—It ________ be her. She’s having the board meeting.A．can’t B．shouldn’t C．mustn’t D．needn’t9．It’s of great importance to protect the environment. Each of us ________ take an active part in it.A．can B．may C．would D．should 10．—There is a knock at the door.—It ________ be my mom. She always comes back home at this time.A．may B．may not C．must D．can’t11．—Be careful! Fire ________ be dangerous sometimes.—OK. I will put it out right away.A．mustn’t B．should C．can D．needn’t 12．— What do you think of the show yesterday?— Some of them were really good but others ________ be better.A．will B．must C．need D．can13．You ________ write the report again because spelling mistakes are not allowed at all. A．must B．can C．may D．could 14．—How beautiful the winter jasmines (迎春花) are!—Yes. These golden-yellow flowers ________ be widely seen in my city in March.A．must B．can C．would D．should 15．—Where is Tom? I am considering ________ him about the result of the exam.—Oh. You ________. He has known it already.A．to tell; can't B．telling; needn't C．tell; mustn't D．told; shouldn't 16．When you visit a museum, some instructions should ________ and we’d better not________ them.A．pay attention to; be against B．be paid attention; againstC．be paid attention to; against D．be paid attention to; be against 17．— Mom, must I clean my room now?— No, you ________. You can do it after dinner.A．needn’t B．mustn’t C．shouldn’t D．can’t18．It’s amazing that the pen ________turn voice into text with few mistakes.A．can B．must C．may D．need19．— Zoe, what do you think is the greatest advantage of shopping online?— At least I ______ spend much time going from shop to shop.A．shouldn’t B．can’t C．needn’t D．mustn’t 20．Please don't make so much noise. I ________ hear the speaker very well.A．needn't B．can't C．shouldn't D．mustn't 21．The boy is very brave．I ________ he ________ the tall tree．A．dare say; dares to climbB．dare to say; dare climbingC．dare saying; dares climbD．dare to say; dares climbed22．You ______ pay too much attention to your pronunciation, as it is so important in the oral （口头的） test.A．shouldn’t B．mustn’t C．can’t D．needn’t 23．—Ready? Let’s get started, Martin.— Swimming? I just ________ get used to it in winter.A．can’t B．needn’t C．mustn’t D．shouldn’t 24．Dr. Zhong Nanshan once said, "To prevent the spread of this disease, we________never be too careful."A．can B．may C．must D．should 25．—Will my car be ready by the end of the day?—It ________ be, sir. I’ll call if there’s any problem.A．must B．could C．shall D．should26．— Mum, why do I have to wash hands so many times a day?—You ________ be too careful, for your health.A．can’t B．mustn’t C．may not D．needn’t27．To avoid ________, we’d better ________ the parents’ meeting online.A．gather; hold B．gathering; hold C．gather; holding D．to gather; to hold 28．You ________ require others to do with the problem like you. Everyone has his own way. A．mustn’t B．needn’t C．may not D．shouldn’t29．—I must go to school today, ________?—No, you ________.You can go as soon as you get well.A．mustn’t I;needn’t B．needn’t I;needn’tC．mustn’t I;mustn’t D．needn’t I;mustn’t30．—Why didn’t you tell it to me earlier?— Why ________ I? I want to have my own secret.A．can B．may C．should D．shall 31．—Mum, why do I have to wear a mask before entering the supermarket?—For your health and safety, you ________ be too careful.A．shouldn’t B．can’t C．mustn’t D．needn’t 32．—What is that young lady’s job?—She ________ be a nurse, I’m not sure.A．must B．may C．need D．would 33．According to the rule, used batteries ________ be dropped in the red bin for harmful wastes. A．may B．would C．should D．might34．You _________ smoke here! Look at the sign. It says "No smoking".A．needn't B．mustn't C．can D．may35．—Must I finish all my homework today, Mum?—No, you ________, my dear. You can finish some tomorrow if you like.A．needn’t B．shouldn’t C．can’t D．mustn’t36．We've discussed every detail of this plan and have got everything ready. But still something ________ go wrong. We still have to be very careful.A．must B．should C．would D．may37．—In China, many students have to stay up late to do their homework.—No worries. The government has realized the problem. I’m sure there ________ be good news soon.A．can B．should C．must D．need38．Most young people like shopping online because they ________ spend much time going from shop to shop.A．needn’t B．can’t C．mustn’t D．shouldn’t 39．—Could I join you in the programme?—Sorry, you ________. You are too young.A．shouldn’t B．mustn’t C．can’t D．needn’t40．I think all the students love the weekends because, to them, they ________ get up early on Saturdays or Sundays.A．mustn’t B．don’t need C．needn’t D．can’t41．You ________ pay too much attention to protecting yourself if you plan to go abroad.A．mustn’t B．can’t C．shouldn’t D．needn’t 42．When people are waiting at the zebra crossing, cars and buses ________ wait and let them go first.A．must B．may C．can D．need43．—Will dad arrive home at 6 o’clock to have dinner with us this evening?— I think he will, but he ________ not. Sometimes he works extra hours.A．can B．must C．need D．may 44．—Seventy dollars for such a dress! You ________ be joking!—I’m serious. It’s made of silk from Hangzhou.A．must B．need C．will D．can45．Look at the floor, Tom! ________ you watch TV while having a meal?A．Should B．Could C．Must D．May 46．—Excuse me. I haven’t finished reading the book yet. May I keep it a bit longer?— Sorry, you ________. You must return it on time.A．needn’t B．can’t C．won’t D．shouldn’t 47．Sometimes smiles ________ be false, hiding other feelings like anger, fear or worry. A．should B．would C．must D．can48．— The sandstorm in Beijing is so serious this year.— Yes, I wonder when we ________ worry about the air we breathe.A．can’t B．mustn’t C．needn’t D．shouldn’t 49．For the safety of the passengers, objects like guns ________ be carried on board.A．may not B．needn’t C．might not D．mustn’t 50．Never throw objects from the building. Even a small object ________ cause serious injuries, or death, when dropped from a great height.A．must B．should C．may D．need【参考答案】***试卷处理标记，请不要删除一、选择题1．D解析：D【详解】句意：你最好从现在开始努力学习，否则你考试会不及格的。

情态动词专练60题1. —Mr. White, do we have to finish this report today?—Of course, you_______.A. willB. mustC. needD. may2. When I got out of the cinema, it was already one o’clock in the morning. Therefore, I ____ walk home instead of taking a taxi.A. had toB. mustC. shouldD. couldn’t3. —Mum, _____ I do the cleaning today?—No, you _______ as you have a free Sunday tomorrow. Just take your time.A. must；mustn’tB. must；don’t have toC. shall；mustn’tD. may；can’t4. Robert, this must be the most boring party we’ve ever been to, _______?A. isn’t itB. mustn’t itC. haven’t youD. aren’t you5. —Can I smoke here, Belinda?—Oh, my darling. If you _____, choose a seat in the smoking section.A. shallB. shouldC. mustD. may6. —Hurry up, Norman! It’s 15 past nine.—My goodness! The class ______. I’ll be scolded by the Ms. Janet again.A. must beginB. must have begunC. should have begunD. might have begun7. —Have you find anything special, sir?—We make sure that the thief entered the computer room through the window instead of breaking in. The students ____ have closed the windows after class.A. mayB. shouldn’tC. couldn’tD. must8. —Stephen, did you have a good time at the party last night?—Yes, but I really ______ have, because the mid-term examination is coming.A. needn’tB. couldn’tC. shouldn’tD. mustn’t9. —Why! Monica, I couldn’t get you on the phone this morning.—Really? I ______ the flowers in my garden when you phoned me.A. must be wateringB. must have been wateringC. might waterD. ought to have watered10. The header teacher explained to the parents that the wound on their child’s head _____ days before.A. should have been receivedB. ought to have been receivedC. might have receivedD. must have been received11. —Don’t be late for the film Titanic this evening.—Of course I won’t. As a matter of fact, I _______ wait to see the film.A. needn’tB. mustn’tC. can’tD. shan’t12. Joseph, you ______ go to play computer games with your homework unfinished!A. don’t have toB. can’tC. may notD. mustn’t13. Frank _____ come and worry Charlene with questions, just when she was busy cooking the dinner!A. mustB. canC. shallD. will14. —Will they go out for an picnic today, Maggie?—Oh, t hey ______, because it seems that it’s going to rain.A. mustn’tB. needn’tC. may notD. can’t15. —I’d like to lose weight, David.—Oh, my dear, you ______ be out of your mind. You’ve 45 kilograms at the most!A. mustB. shallC. willD. can16. There is no light in the dormitory. They must have gone to the dancing ball, ________?A. didn’t theyB. mustn’t theyC. haven’t theyD. hadn’t they17. —Do you believe Cecilia has good table manners?—Oh, no. As is known to us all, she _____ comb her hair at the table, even though she knows we don’t like it.A. willB. mayC. has got toD. shall18. —Martina, is it suitable to refer to the dictionary when I come across every new word in the reading?—No, you ______, because you are likely to make out the meaning from the context.A. mustn’tB. can’tC. ought not toD. needn’t19. —_____ Jack have made an apology to Rosemary?—Yes, he _______. Otherwise, she couldn’t be chatting with him now.A. Must；mustB. Can；mustC. Must；must haveD. Can；must have20. —I guess you might have missed your bus to Beijing the day before yesterday.—Well, I almost ______.A. mightB. didC. haveD. had21．—How about going to attend Jason’s birthday party tomor row evening, Jeffrey?—It all depends. It ______ be a suitable time for me, though.A. mustB. shallC. mightD. should22．—Sir, I’m terribly sorry for not having handed in my paper on time, but I have been very busy all these days.—No excuse for it, but I _______ drop it this time.A. mightB. canC. shouldD. must23．There’s a wide range of programs on the market which ______ be described as design aid.A. mayB. willC. mustD. need24．—Shall I have a smoke here, conductor?—No, you ______. As we all can see, we are now at the gas station.A. won’tB. mustn’tC. can’tD. needn’t25．Hubert had been knocking at the door for a long time, but no one come to open it. He murmured to himself, “No one _______ be in door.”A. mustB. shouldC. mayD. can26．—Did Bernadette come to the international medical conference?—I have no idea. She _______ while I was out.A. may have comeB. must have comeC. might comeD. could have come27．—Could you put out your cigarette, please.—Yes. I ______.A. mayB. couldC. canD. should28．Business has been thriving in the past year. Long ______ it continue to do so.A. canB. mustC. mayD. shall29．—Mr. Smiths, we’ve been working since seven o’clock in the morning. _______ we turn on the TV and watch the breath-taking action film Jurassic Park for a while?—No, I’m afraid not. Besides, there are only a few hours left before the deadline.A. Might notB. Won’tC. Wouldn’tD. Can’t30．We must have learned 3,000 English words by the end of last term, _______?A. haven’t weB. hadn’t weC. didn’t weD. mustn’t we31．—Have you heard of the gymnastic team of our country?—Yeah, they couldn’t have done _____. They beat Russian team and for the first time became the second to none in the gymnastic history.A. muchB. bestC. worseD. better32．Betsy, how _______ you say that you really understand the whole lecture of mine if you have covered only part of it?A. canB. willC. needD. may33．—Well, lost again!—I t’s not very important, Shelagh. We ______ as well forget about it, ok?A. canB. mightC. willD. must34．I always end up having an argument with her, I don’t know why, I just _______ help it.A. shan’tB. don’tC. can’tD. may not35．—Cherry, where is Malcolm? I haven’t seen him this afternoon. Someone is waiting for him at the school gate.—I haven’t seen him, either. Oh, oh…, he ______ football on the playground.A. could playB. must be playingC. may be playingD. must have played36．I ______ have bought the latest type of digital camera, but unfortunately I didn’t get enough money with me.A. couldB. mustC. needn’tD. shouldn’t37．—The Chinese scientists stayed in Antarctic studying the continent for a few months before they returned home.—Oh, dear! These explorers _______ a lot of difficulties!A. may go throughB. might go throughC. ought to have gone throughD. must have gone through38．—Paul，I didn’t know you two were friends for ages.—You _______. I have known her since she moved here. You were studying in U.S. for your doctor’s degree then.A. couldn’t haveB. couldn’tC. must haveD. may not have39．The pills _______ him, if only he’d taken them regularly.A. may have helpedB. might have helpedC. must have helpedD. could help40．—What fine weather we’ve been experiencing these days, isn’t it?—Yes, Ｉcan’t agree with you more, but it ______be quite cold here in winter.A. mayB. canC. needD. should41. —Mr. Black, can we leave the chemistry lab with the lights on?—No, you ______ better not.A. shouldB. wouldC. couldD. had42. Bus No. 101 comes every 10 minutes along the People’s Road. There ______ be one coming.A. mayB. shallC. shouldD. will43. —Bessie ,do you mind if I smoke?—Well, I’d _____ you didn’t. You see, there are so many boys and girls in the room.A. betterB. bestC. ratherD. like44. —I think I’ll give Catherine a ring now.—Yeah, Georgia , you ______ indeed. You haven’t kept in touch with her for a ges.A. have toB. shouldC. mayD. will45. If you are planning to spend your weekends on the beach this week, better ______ it —it’s reported that a hurricane is on its way.A. forgotB. forgetC. forgettingD. to forget46. Rudolph, you ______ be sitting here smoking. This is a non-smoking area.A. can’tB. needn’tC. won’tD. oughtn’t to47. All interviewees are waiting outside the office, Manager. _____ they come in together or separately?A. ShallB. WouldC. WillD. Can48. My demand is that the valuable information downloaded from the Internet _____ be e-mailed to your editor-in-chief without delay.A. wouldB. ought toC. shouldD. must49. —Margaret hasn’t finished his work yet.—Well, she _______.A. shouldB. ought toC. ought to haveD. is going to50. There was a lot of fun at yesterday’s party. Frances, you ought to have come, but why _____ you?A. didn’tB. don’tC. haven’tD. hadn’t51. Why ______ I help Victor? He’s never done anything for me.A. canB. shouldC. mayD. will52. —Someone ______ have mowed the lawn this morning, didn’t he?—Yes, Cooper did. I ______ have done that. I have been preparing a speech the whole morning, though.A. ought to；couldB. might；needn’tC. couldn’t；mayD. must；should53. You’d better not eat fruit that isn’t ripe, ______?A. hadn’t youB. would youC. had youD. will you54. —Susanna, let’s go and buy some food, fruit and drinks for your birthday party.—Oh, no, I have prepared a fridge of those theses days. I think that _____ be quite enough.A. mayB. willC. ought toD. can55. _____ a person be breathing but not conscious, it is usually best for him or her not to be moved.A. WouldB. ShouldC. CouldD. Might56. “All the candidates _______ remain in their seats until the papers have been collected according to the examination regulation”, declared the officer from government.A. willB. shallC. mayD. should57. —Hello, is that Mr. Smith speaking?—Sorry, I’m afraid that he isn’t in. This is his secretary speaking. What can I do for you?—_____.A. Oh, you willB. I should think soC. Ok, you ought to.D. Well, I looking forward to hearing from you.58. —Martina looks rather sad. Did you tell her about her grandma’s dea th?—Yes, but I _____ her just before the college entrance Examination.A. couldn’t have toldB. should have toldC. needn’t have toldD. ought not to have told59. —It has been reported that China has successfully launched the manned spaceship Shenzhou Ⅴ, and landed safe a few days later.—Well, it’s astonishing that the Chinese people _____ has made so much progress in space exploration these years.A. mustB. mayC. shouldD. can60. —Excuse me, Anthony, but I want to use your Advanced Lea rner’s English-Chinese dictionary for a moment.—You _____ have my dictionary if you don’t take care of it.A. oughtn’t toB. needn’tC. may notD. shan’t【答案解析】：1. 答案：【B】。

中考英语情态动词推测基础单选题40题1.There is a lot of noise in the classroom. There ____ be some students having a discussion.A.mustB.canC.mayD.need答案：A。

本题考查情态动词表推测的用法。

must 表示肯定的推测，有“一定”的意思；can 表示推测时通常用于否定句和疑问句；may 表示不太肯定的推测；need 一般不用于推测。

教室里有很多噪音，很有可能是一些学生在讨论，所以用must 表示肯定的推测。

2.I can't find my keys. They ____ be in my bag.A.mustB.canC.mayD.could答案：C。

must 表示肯定的推测，但这里说话者不确定钥匙在包里，只是一种可能性，所以用may；can 表示推测时通常用于否定句和疑问句；could 也表示可能性，但语气比may 更委婉。

3.Look! The light in the teacher's office is on. Miss Li ____ be there.A.mustB.canC.mayD.should答案：A。

看到办公室的灯亮着，很有可能老师在里面，所以用must 表示肯定的推测；can 表示推测时通常用于否定句和疑问句；may 表示不太肯定的推测；should 表示应该，不用于推测现在的情况。

4.The boy looks very tired. He ____ have stayed up late last night.A.mustB.canC.mayD.need答案：A。

男孩看起来很累，很有可能昨晚熬夜了，所以用must 表示肯定的推测；can 表示推测时通常用于否定句和疑问句；may 表示不太肯定的推测；need 一般不用于推测。

5.I hear some strange sounds outside. There ____ be something wrong.A.mustB.canC.mayD.need答案：C。

一、选择题1．It's raining._______an umbrella with you when you go out.A．Takes B．Take C．Taking D．Took B解析：B【解析】【详解】句意：下雨了，当你出去的时候，随身携带一把雨伞。

考查祈使句。

take携带，根据所给空后面的when you go out可知，应该用的是祈使句，祈使句肯定形式的构成：动词原形放在句首，故选B。

2．______ talk in the library.A．Don’t B．Not C．Not to A解析：A【解析】【详解】句意：在图书馆不要说话。

此处是祈使句的否定形式，因此在动词原形前加don’t，故为Don’t+动词原形。

故选A。

3．Mike, __________ make any noise, your father is sleeping.A．not B．don't C．won't D．can't B解析：B【解析】【详解】句意：麦克，不要吵闹，你父亲正在睡觉。

考查祈使句。

A. not 不，没有；B. don’t 不，没有；C. won’t 将不会；D. can’t 不能，不会。

A 选项为否定词；B选项为助动词，后面要接动词；C选项为助动词，将来时表将来；D选项为情态动词，表否定推测。

根据否定祈使句用法，应用助动词don’t + 动词原形结构。

A、C、D均不符合，故应选B。

4．Please _____ look outside. Look at the black board.A．not B．don’t C．aren’t D．can’t B解析：B【解析】【详解】句意：请不要往外面看，看黑板。

not不，副词；don’t不要；aren’t不是；can’t不能。

这是祈使句的否定形式，应用don’t，后跟动词原形。

故应选B。

5．Tim,______noisy in the library.A．don’t B．doesn’t C．don’t be D．doesn’t be C解析：C【解析】句意：提姆，不要在图书馆里吵闹。

中考英语情态动词推测基础单选题40题1.He must be at home now. Because his bike is still outside.A.mustB.can'tC.mayD.should答案：A。

must 在这里表示肯定的推测，意为“一定”，因为他的自行车还在外面，所以很有可能他在家。

can't 表示否定的推测，意为“不可能”；may 表示不太肯定的推测，意为“可能”；should 通常表示应该，在这里不用于推测现在的情况。

2.She may be in the library. I'm not sure.A.mustB.can'tC.mayD.should答案：C。

may 表示不太肯定的推测，句中说不确定她是否在图书馆，所以用may。

must 表示肯定的推测；can't 表示否定的推测；should 不用于推测现在的情况。

3.It can't be Tom. He has gone to Beijing.A.mustB.can'tC.mayD.should答案：B。

can't 表示否定的推测，因为知道Tom 去了北京，所以不可能是他。

must 表示肯定的推测；may 表示不太肯定的推测；should 不用于推测现在的情况。

4.They must be having a meeting. I hear some voices.A.mustB.can'tC.mayD.should答案：A。

must 表示肯定的推测，听到一些声音，所以很有可能他们在开会。

can't 表示否定的推测；may 表示不太肯定的推测；should 不用于推测现在的情况。

5.He may not be at school. He is sometimes absent.A.mustB.can'tC.may notD.should答案：C。

三年级英语情态动词基础单选题40题1. You ______ run in the classroom.A. canB. can'tC. mustD. mustn't答案：B。

本题主要考查情态动词的否定用法。

A 选项“can”表示能够，B 选项“can't”表示不能，C 选项“must”表示必须，D 选项“mustn't”表示禁止。

在教室里不能跑，所以选B。

2. We ______ be quiet in the library.A. canB. can'tC. mustD. mustn't答案：C。

在图书馆必须保持安静，“must”表示必须，故选C。

3. She ______ swim very well.A. canB. can'tC. mustD. mustn't答案：A。

“swim very well”表示游泳游得好，有能力做某事用“can”，所以选A。

4. You ______ eat too much candy. It's bad for your teeth.A. canB. can'tC. mustD. mustn't答案：D。

吃太多糖对牙齿不好，所以禁止，“mustn't”表示禁止，选D。

5. They ______ finish their homework on time.A. canB. can'tC. mustD. mustn't答案：C。

按时完成作业是应该的，“must”表示必须，故选C。

6. I ______ find my pen. Where is it?A. canB. can'tC. mustD. mustn't答案：B。

找不到钢笔，“can't”表示不能，选B。

7. He ______ ride a bike. He's too young.A. canB. can'tC. mustD. mustn't答案：B。