英语情态动词讲解及练习(附答案)

【英语】情态动词练习题含答案及解析一、单项选择情态动词1．—Can I pay the bill by check?—Sorry，sir．But it is the management rules of our hotel that payment _____ be made in cash．A．shall B．needC．will D．can【答案】A【解析】【详解】考察情态动词用法。

句意：——我能用支票付账吗?——对不起,先生。

但这是我们酒店的管理规定,支付要用现金。

shall可以表示命令，警告，强制，或者指规则和法律要求做的事情。

本题正是考察了shall表示按照规则和法律要求做的事情。

故A正确。

2．You _____ be right but I’m going back to check anyway.A．should B．must C．need D．might【答案】D【解析】【详解】考查情态动词。

句意：你或许是对的，但我还是要回去核对一下。

A. should应该；B. must 一定，必须；C. need需要；D. might或许。

本题主要考查情态动词表示推测的用法，由I’m going back to check anyway可知，我对此不确定。

由此可知，D项符合题意。

故选D项。

【点睛】can / could用于表推测的用法(1) 从使用句型上看，can 通常只用于否定句或疑问句，一般不用于肯定句，而could 可用于肯定句、否定句和疑问句。

两者没有时间上的差别，只是could 比 can 更委婉，更不确定。

(2) 从时间关系看，对现在或将来情况作推测，后接动词原形；对正在进行的情况作推测，后接 be doing 结构；对过去情况作推测，后接动词完成式。

二、 may / might用于表推测的用法表示推测，两者都可用，只是 might 比 may 语气更不确定，表示的可能性更小。

英语情态动词专项练习题及答案详解含答案解析一、初中英语情态动词1．The girl riding a horse there be Shirley. Her left leg was badly hurt in an accident yesterday.A. needn'tB. may notC. can'tD. mustn't【答案】C【解析】【分析】句意：那边骑马的女孩不可能是雪莉。

她的左腿在昨天的事故中受了重伤。

A.needn't不必；B. may not不可以；C. can't不可能，表示否定的推测；D. mustn't 不准，不允许，表示禁止。

本题表示否定的推测，不可能：can't。

故选C。

2．—Where is Monica? I can't find her anywhere.—She be in the library. She loves reading books when she is free.A. mustB. needC. can't【答案】 A【解析】【分析】句意：——莫妮卡在哪？我到处都找不到她。

——她肯定在图书馆，她喜欢空闲时看书。

A肯定，肯定句中表示推测，B需要，C不可能，否定句中表示推测，根据 She loves reading books when she is free ，可知是肯定句表示推测，故选A。

【点评】考查情态动词，注意情态动词表推测的用法。

3．—I missed last night's Everlasting Classics（《经典咏流传》）！—You care. You can watch it online later.A. mustn'tB. can'tC. may notD. needn't【答案】 D【解析】【分析】句意：——我错过了昨晚的《经典咏流传》！——你不必在意，以后你可以上网看。

情态动词详解、典型例题及模拟试题（含答案）1 . must、can、could、may、might、will / would 、shall / should 、need、dare △must的肯定式表示必须”否定式must n't表示禁止，严禁"的意思。

如：You must come here .You mustn' t take the book away from the library .同义词为have to do ,表示不得不”一般表示客观原因造成的不得不、被迫”女口：My car was broken , so I had to walk home .△can的肯定式表示能、会”可以”否定式ca n't表示不能，不会，不可以”。

女口：He can swim . I can ' t swim . You can go now同义词为be able to do ,也表示能，会”一般表示经过努力才具有的能力与can 的区别，主要是它可有时态。

如：He was able to cou nt to 10 , 000 whe n he was 3 .He will be able to walk n ext month△may表示可以”否定式may not 表示不可以"表示经某人允许。

女口：You may go home now . You may not go home now△will表示将要，打算"用于将来时，否定式will not / won '表示将不”不打算”。

女口：He will come here next week . He won' t come home .△shall用于第一人称后表示将要”打算”否定式shall not表示将不，不打算”。

女口：We shall go home together . I shall go there first .用于其他人称后表示必须，得”与must相近，但表示别人认为主语应该，得”女口：He shall go and see his aunt . Shall he open the door ?△need表示需要”否定式need n't表示不需要，不用”女口：He need do some washing . You needn' t stay here any more .△dare表示敢于.... "否定式dare not 表示不敢....... ”女口：He dare say no to wrong things . He dare not go home alone at night .注：need与dare除情态动词用法外还有实意动词用法，且意义不变。

英语情态动词含答案解析一、情态动词单项选择题1．—What are you going to do tomorrow?—I’m not sure. I ________ make a trip to Hangzhou with my girl friend.A．may B．can C．will D．must【答案】A【解析】【详解】句意：——你明天打算做什么？——我不确定。

我可能和我的女朋友去杭州旅行。

考查情态动词。

may可能；can能；will将要；must必须。

由“I’m not sure.”我不确定，可知这里表示“可能去旅行”，用may表示“可能性”的推测。

故选A。

2．—I cannot find my pen. ________ I borrow yours?—Sure.A．Can B．Must C．Should D．Would【答案】A【解析】【详解】句意：——我找不到我的钢笔。

我可以借你的吗？——当然。

考查情态动词辨析。

can可以；must必须；should应该；would将。

根据“I borrow yours”可知，此处应用can表请求允许，希望能借对方的钢笔用一下，故选A。

3．—We’ve got everything ready for the picnic.—Do you mean I ________ bring anything with me?A．can’t B．needn’t C．couldn’t D．mustn’t【答案】B【解析】【详解】句意：——我们已经为野餐做好了一切准备。

——你的意思是我不需要带任何东西吗？考查情态动词。

can’t不能；needn’t不需要；couldn’t不能；mustn’t不允许。

根据上句说已经准备好了一切，可推测说话者的意思是不需要带任何东西了。

故选B。

4．Our teacher often suggests we ________ on both sides of the paper.A．write B．writes C．writing D．to write【答案】A【解析】【详解】句意：我们老师经常建议我们在纸的两面写字。

情态动词情态动词有can (could), may (might), must, have to, shall (should, will (would), dare (dared), need (needed), ought to等。

情态动词无人称和数的变化；不能单独使用，必须与其后的动词原形构成谓语。

一、can, could1) 表示能力（体力、知识、技能）。

如：Can you lift this heavy box? （体力）Mary can speak three languages.（知识）Can you skate?（技能）此时可用be able to代替。

Can只有一般现在式和一般过去式；而be able to则有更多的时态。

如：I’ll not be able to come this afternoon.当表示“经过努力才得以做成功某事”时应用be able to，不能用Can。

如：He was able to go to the party yesterday evening in spite of the heavy rain.2) 表示请求和允许。

-----Can I go now?----- Yes, you can. / No, you can’t.此时可与may互换。

在疑问句中还可用could, might代替，不是过去式，只是语气更委婉，不能用于肯定句和答语中。

---- Could I come to see you tomorrow?---- Yes, you can. ( No, I’m afraid not. )3) 表示客观可能性（客观原因形成的能力）。

They’ve changed the ti metable, so we can go by bus instead.This hall can hold 500 people at least.4) 表示推测（惊讶、怀疑、不相信的态度），用于疑问句、否定句和感叹句中。

【英语语法】情态动词can的用法（附练习及答案）一、can是情态动词情态动词，本身有一定的词义，但不能独立作谓语，不以人称和数量的变化而变化，后接动词原形，也就是说情态动词和动词原形一起构成谓语。

我们常见的情态动词有：can (could)，may (might)，must，will (would)等。

接下来，我们就来学习一下情态动词"can"的用法。

二、情态动词can具体用法1）表示"能、会"，指脑力或体力方面的"能力"。

I can speak English. 我会讲英语。

Jim can swim but I can't. 吉姆会游泳，但我不会。

2）表示"可能"，常用于否定句或疑问句中，指某种可能性。

Han Mei can't be in the classroom. 韩梅不可能在教室里。

Can he come here today, please? 请问他今天能到这里来吗？3）表示"可以"，常用于口语中，指许可或请求做某事。

Can I have a cup of tea, please? 请问我可以喝一杯茶吗？You can go out. 你可以出去了。

补充：①can在口语中可以代替may，表示许可或可以。

②can't在口语中代替mustn't时，表示禁止或不准。

You can't play football in the street. 不准在马路上踢足球。

③情态动词can的过去式could，用于现在时，可使语气更委婉、更客气。

Could you help me with my English? 你能帮助我学习英语吗？三、情态动词can的基本句型1）肯定句型为：主语+can+动词原形+其它。

They can play basketball. 他们能打篮球。

情态动词总结I 情态动词的特征：1.本身有词义。

2.不能独立作谓语。

2. 后接动词原形一起构成谓语。

3. 不随人称和数的变化。

II 情态动词各自的基本意义及用法：1.大多数情态动词（除表‘能力、许可、意志’外），都可以表示推测，其程度有差异。

按可能性程度的高低排列为：must﹥will ﹥would ﹥ought to ﹥should完全肯定完全可能很可能﹥can ﹥could﹥may ﹥might可能有可能2. 区分情态动词的否定含义：may not或许不、可能不might not可能不can’t 不可能mustn’t不许、禁止shouldn’t不应该needn’t 不必1.情态动词表推测的反意疑问句，简单来说，就是以情态动词后的时态为淮，如句子里有明确的时间状语，则以其为准。

2.以must 为例：E.g. 1. You must be hungry now, aren’t you?2. He must be watching TV , isn’t he ?3 Tom must have lived her for a long time, hasn’t he ?4. She must have arrived yesterday, didn’t she?注：如选择题中（以She must have arrived yesterday, didn’t she？为例）既有didn’t she又有hasn’t she则以didn’t she？为最佳答案。

IV 情态动词专项练习与解析一( ) 1. You _____ return the book now. You can keep it till next week if you like.A. can’tB. mustn’tC. needn’tD. may not( ) 2. Where is my pen? I _____ it.A. might loseB. would have lostC. should have lostD. must have lost( ) 3. I wish I _____ you yesterday.A. seenB. did seeC. had seenD. were to see( ) 4. I didn’t hear the phone. I _____ asleep.A. must beB. must have beenC. should beD. should have been( ) 5. If my lawyer _____ here last Saturday, he _____ me from going.A. had been; would have preventedB. had been; would preventC. were; would preventD. were; would have prevented( ) 6. He _____ you more help, even though he was very busy.A. might have givenB. might haveC. may have givenD. may give( ) 7. If it _____ for the snow, we _____ the mountain yesterday.A. were not; could have climbedB. were not; could climbC. had not been; could have climbedD. had not been; could climb( ) 8. Without electricity human life _____ quite difficult today.A. isB. will beC. would have beenD. would be( ) 9. A computer _____ think for itself, it must be told what to do.A. can’tB. couldn’tC. may notD. might not( ) 10. Jenny _____ have kept her word. I wonder why she changed her mind.A. mustB. shouldC. needD. would( )11. We _____ last night, but we went to the concert instead.A. must have studiedB. might studyC. should have studiedD. would study( ) 12. — Could I borrow your dictionary?— Yes, of course you _____.A. mightB. willC. canD. should( ) 13. Tom ought not to _____ me your secret, but he meant no harm.A. have toldB. tellC. be tellingD. having told ( ) 14. — 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 taken ( ) 15. Peter _____ come with us tonig ht, but he isn’t very sure yet.A. mustB. mayC. canD. will( ) 16. I told Sally how to get here, but perhaps I _____ for her.A. had to write it outB. must have written it outC. should have written it outD. ought to write it out( ) 17. I didn’t see your sister at the meeting. If she _____, she would have met my brother.A. has comeB. did comeC. cameD. had come ( ) 18. — Shall I tell John about it?—No, you _____. I’ve told him already.A. needn’tB. wouldn’tC. mustn’tD. shouldn’t ( ) 19. When a pencil is partly in a glass of water, it looks as if it _____.A. breaksB. has brokenC. were brokenD. had been broken( ) 20. It’s nearly seven o’clock. Jack _____ be here at any moment.A. mustB. needC. shouldD. can( ) 21.— 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 been ( ) 22. Johnny, you _____ play with the knife, you _____ hurt yourself.A. won’t; can’tB. mustn’t; mayC. shouldn’t; mustD. can’t; shouldn’t ( ) 23. The fire spread through the hotel very quickly but everyone _____ get out.A. had toB. wouldC. couldD. was able to ( ) 24. — When can I come for the photos? I need them tomorrow afternoon.— They _____ be ready by 12:00.A. canB. shouldC. mightD. need( ) 25. — I stayed at a hotel while in New York.— Oh, did you? You _____ with Barbara.A. could have stayedB. could stayC. would stayD. must have stayed ( ) 26. — Will you stay for lunch?— Sorry, _____. My brother is coming to see me.A. I mustn’tB. I can’tC. I needn’tD. I won’t( ) 27. — Are you coming to Jeff’s party?—I’m not sure. I _____ go to the concert instead.A. mustB. wouldC. shouldD. might( ) 28. — Write to me when you get home.— _____.A. I mustB. I shouldC. I willD. I can( ) 29. I was really anxious about you, you _____ home without a word.A. mustn’t leaveB. shouldn’t have leftC. couldn’t have leftD. needn’t leave( ) 30. — Is John coming by train?— He should, but he _____ not. He likes driving his car.A. mustB. canC. needD. may专项练习（二）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 punished3. 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 something important 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 not17. 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 youB. are youC. must youD. 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.” “It’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. cos t … notB. to spare … don’tC. pay … thanD. spend … than专项练习（三）1. — Has Li Lin started? He said he would join in the party.— He ______. He is a man of keeping his word.A. could have leftB. must have leftC. can’t comeD. won’t be c oming2. — May I park my car here?— No, you ______. No car is allowed to park here.A. may notB. needn’tC. mustn’tD. daren’t3. — Excuse me, could you tell me where the Yajia Supermarket is?—It’s two blocks straight ahead. You ______ miss it.A. mustn’tB. can’tC. needn’tD. shouldn’t4. — I saw Mr. Sun at Tongyu Station this morning.—You ______. He’s still on holiday in Hawaii.A. couldn’t haveB. mustn’t haveC. shouldn’tD. needn’t5. — How about paying a visit to Dr. Wang, our former Chinese teacher?— Good idea. I will e-mail him today so that he ______ know ______ to expect us.A. shall; whyB. could; whenC. would; whatD. will; how6. Everything has two sides. Beautiful songs, sometimes, ______ be just noise to others.A. mustB. mayC. shouldD. could7. Someone ______ my umbrella. I found it wet yesterday.A. must be usingB. must have usedC. must useD. must have been using8. — How dangerous it was!— Yes, but for the passer-by’s quick action, th e girl ______.A. was drownedB. could have been drownedC. had drownedD. should be drowned9. You ______ scold such a pupil who always keeps silent so seriously that you ______ hurt him.A. should; canB. may; willC. mustn’t; mayD. can’t; must10. — Why does Alice know so much about Angkor Wat?— She ______ have been there, or ...A. mustB. oughtn’t toC. mayD. can’t11. —You may laugh, but I’ve been thinking of becoming a vegetarian.— Oh, you ______ be crazy. You will be hungry all the time.A. mustB. mayC. willD. need12. —What’s the matter with you?—Oh, I’m not feeling well in the stomach. I ______ so much fried fish just now.A. shouldn’t eatB. mustn’t have eatenC. shouldn’t have eatenD. mus tn’t eat13. — ______ he have been chosen as captain of the football team?— Yes, he ______.A. Can; must haveB. Must; must haveC. Can; mustD. Must; must14. Mr. Zhang ______ in Shanghai tomorrow morning.A. can have arrivedB. will have arrivedC. may have arrivedD. must have arrived15. Miss Wang started at 8 o’clock, and she ______ be there now.A. shouldB. canC. can’tD. need16. — It must be Mr. Li who did it. — No, it ______ be Mr. Li.A. mustn’tB. wouldn’tC. can’tD. may17. You ______ finish reading the book as soon as possible.A. mayB. canC. needD. should18. — Need you go to work now? — Yes, I ______.A. mustB. needC. canD. dare19. Your trousers are dirty. ______ them for you?A. Shall I washB. Will I washC. Am I going to washD. Am I washing情态动词专项练习与解析一【练习解析】1．C 从原题中You can keep it till next week if you like这一信息句可知，“你不必现在还”。

【英语】高考英语情态动词题20套(带答案)及解析一、单项选择情态动词1．—Can I pay the bill by check?—Sorry，sir．But it is the management rules of our hotel that payment _____ be made in cash．A．shall B．needC．will D．can【答案】A【解析】【详解】考察情态动词用法。

句意：——我能用支票付账吗?——对不起,先生。

但这是我们酒店的管理规定,支付要用现金。

shall可以表示命令，警告，强制，或者指规则和法律要求做的事情。

本题正是考察了shall表示按照规则和法律要求做的事情。

故A正确。

2．Ann said whenever her father was unhappy he ________ go out and buy something, usually something large and useless.A．should B．couldC．would D．might【答案】C【解析】【详解】考查情态动词。

句意：安说无论什么时候她父亲不高兴的时候，他就会出去买些东西，通常是一些又大又没用的东西。

A. should应该；B. could能；C. would总是，愿意；D. might 可能。

此处表示过去经常习惯做某事，故选C。

3．The accident which left 15 people on board dead ________ if both the angry female passenger and the bus driver had kept calm.A．should have avoided B．should be avoidedC．could have avoided D．could have been avoided【答案】D【解析】【详解】考查“情态动词+完成式”。

大学英语情态动词完整详细版附练习题情态动词概述情态动词是英语中一类特殊的动词，用于表达说话人的意愿、能力、推测、建议、许可等。

常见的情态动词有 "can"、"could"、"may"、"might"、"shall"、"should"、"will"、"would"、"must" 等。

以下是对每个情态动词的详细解释和用法：1. Can 表示能力、许可或请求。

例如：Can表示能力、许可或请求。

例如：- I can swim.（我会游泳。

）- Can I use your pen?（我可以用你的钢笔吗？）2. Could 过去式形式的 "can"，表示能力、请求或礼貌的请求。

例如：Could过去式形式的"can"，表示能力、请求或礼貌的请求。

例如：- I could ride a bike when I was five.（我五岁时就会骑自行车了。

）- Could you please open the window?（可以请你打开窗户吗？）3. May 表示许可或推测。

例如：May表示许可或推测。

例如：- May I go to the bathroom?（我可以去洗手间吗？）- It may rain tomorrow.（明天可能会下雨。

）4. Might 过去式形式的"may"，表示推测或可能性较小。

例如：Might过去式形式的 "may"，表示推测或可能性较小。

例如：- I thought it might be too late.（我想可能太晚了。

）5. Shall 表示将来时态的意愿、建议或命令。

例如：Shall表示将来时态的意愿、建议或命令。

初中英语：情态动词真题100题第一部分:1-50 真题解析第二部分:51-100练习及答案1．—Mommy, may I go swimming now?—Yes, honey, but remember that you _____go with your Daddy.A．must B．may C．would D．can全面解析：——妈妈，我现在可以去游泳了吗？——是的，亲爱的，但记住你必须和你爸爸一起去。

must必须；may可以，可能；would将会；can能；根据yes和转折词but，可知是可以去但必须跟爸爸一起，must符合题意，故答案为A。

2．— Whose notebook is this?— It _______________ Bill's. It has his name on it.A．can't be B．must be C．can be D．mustn't be全面解析：——这是谁的笔记本？——一定是比尔的。

can't be不可能是，表示否定的推测；must be 一定是；can be可以是，可能；上面有他的名字。

mustn't be 不能；根据It has his name on it. 上面有他的名字，可知，这个笔记本一定是吉姆的，表示肯定的推测，故答案为B。

3．—____________ you call back tomorrow?— Of course I can.A．Can B．Must C．May D．Need全面解析：——你能明天再打来吗？——我当然可以。

can，可以；must，必须；may，可以，主语常用第一人称；need，必须。

都是情态动词。

从答语中can知，问句也用can。

故选A。

4．— Two hundred yuan for such a T-shirt! You ___________________ be joking!— I'm not joking. It's made of silk.A．can't B．can C．need D．must全面解析：——这样一件T恤要两百块！你一定是在开玩笑！——我不是在开玩笑。

初中英语情态动词详细用法归纳（含练习及答案）情态动词有具体的词义, 但也同助动词一样, 需要与其他词语一起构成句子的谓语, 另外情态动词没有人称和数的变化, 情态动词后必须跟动词原形。

1.ca.的用法:（1）.表示能力、许可、可能性.表示能力时一般译为“能、会”.即有种能力, 尤其是生来具备的能力.如：Sh.ca.swi.fast.bu..can’.. 她能游得很快, 但我不能。

.ca.se.wit.m.eyes.我用眼睛看。

could是can的过去式。

表示过去的能力.b.abl.t.d.sth.常常指经过努力，花费了时间和劳力之后才能做到某事。

is/am/ar.abl.t.d.sthwas/were able to do sth.（2）.表示许可, 常在口语中。

如: .m.dictionary..你可以用我的字典。

（3）.表示推测, 可能性, 意为“可能”.常用于否定句和疑问句中.此时can’.译为.不可能”.如：Ca.th.new.b.true.这个消息会是真的吗？—Ca.i.b.ou.teacher?那个人有可能是我们老师吗？—No.i.can’.b.ou.teacher.H.i.o..visi.t.th.Grea.Wall.不可能。

咱们老师正在游览长城呢。

【例题】—.thin.Mis.Ga.mus.b.i.th.library.Sh.sai.sh.woul.g.there.—No.Sh.__b.there..hav.jus.bee.there..A.can’.B.mustn’.C.needn’.D.wouldn’t【解析】根据下文“我刚去过那儿”可知, 应为“不可能”, can’t 表示推测[答案] Acould的用法:（1）.can的过去式, 意为.能.会”, 表示过去的能力。

如: H.coul.writ.poem.whe.h.wa.10. 他十岁时就会写诗。

（2）.could在疑问句中, 表示委婉的语气, 此.coul.没有过去式的意思。

情态动词主要用来表示说话人的看法、态度等,但不能单独作谓语,只能和其他动词原形构成谓语。

1. can (could)1) 表示能力，could主要指过去时间。

例如：① Two eyes can see more than one. 两只眼比一只眼看得清。

② Could the girl read before she went to school? 这女孩上学前能识字吗？因为can不能和其他助动词连用，所以表示将来式时用will be able to例：You will be able to skate after you have practiced it two or three times.注意：Can表示一贯的能力，be able to表示客观能力和通过努力可以达到的能力I can’t swim. But I am sure I will be able to swim through more practicing.The fire spread through the hotel, but everyone was able to get out2) 表示允许。

例如：① Can I have a look at your new pen? 我可以看一看你的新钢笔吗？② He asked whether he could take the book out of the reading—room. 他问他可不可以把书带出阅览室。

3) 表惊异、怀疑、不相信等态度。

主要用于否定句、疑问句或感叹句中。

例如：① Where can (could) they have gone to? 他们会去哪儿了呢？② How can you be so careless? 你怎么这么粗心？could 加完成式还用于肯定句时一般表过去可能完成而却未完成的动作。

You could have completed the task a little earlier.你本来能早点完成任务的。

情态动词常见的情态动词有：can 能may 可以will，would （表意愿）need 需要dare 敢must 必须have to 不得不shall，should 应该（表义务）ought to 应该1.can，could 的用法1.1表能力，有“能”、“会”、“能够”的意思例如：Can you drive a car? 你会开车吗？-----Yes, I can. 我会。

-----No, I can't. 我不会。

1.2表允许，在口语中代替may，有“可以”的意思例如：Can I use your bike?我可以用你的自行车吗？1.3表示可能性，常用于否定句和疑问句例如：Can it be true?那会是真的吗？Today is Sunday. He can't be at school.今天是星期天。

他不可能在学校里。

1.4过去式could表示的语气更加委婉、客气例如：Could I come to see you tomorrow?明天我可以来见你吗？1.5 can 和be able to 的比较1) can 只有一般现在时和一般过去时两种时态(could)，其他时态要用be able to的形式例如：I haven't been able to get in touch with her.我一直没能和她联系上。

2) 通常can 和be able to 可以互换例如：He will come if he can.如果可能的话，他一定会来。

2.may，might的用法2.1表示许可或征求对方的许可，有“可以”的意思。

例如：You may go now.你可以走了。

May I use your computer?我用一下你的电脑可以吗？2.2回答以may开头的疑问句有如下表达法：例如：May I smoke here? 我可以在这儿抽烟吗？-----Yes, you may.-----Yes, please.------No, you can't.------No, you mustn't.------No, you'd better not.2.3表示猜测，通常只用于陈述句例如：You may be right.你可能是对的。

情态动词的基本用法1．shall(1)用在第一、三人称的疑问句中，表示征求对方的意见。

►Shall Tom go there with me tomorrow?明天汤姆可以和我一起去那里吗？(2)用于第二、三人称陈述句中，表示说话人的命令、警告、威胁、许诺、决心等，意为“必须”。

►The school rules state that no child shall be allowed out of the school unless accompanied by an adult.学校制度规定，除非有成人陪同，任何孩子不准离开学校。

2．should(1)表示责任、义务、劝告、建议，意为“(按道理)应该”。

►You should listen to your doctor's advice.你应该听医生的建议。

(2)表示出乎意料的语气，意为“竟然，居然”。

►I am surprised that you should speak in such a way.我很惊讶你居然用那种口气说话。

3．must(1)表示“必须，应该”，语气强烈。

强调主观看法，只有现在时形式，否定式是must not(mustn't)，表示“禁止”。

must开头的问句，其否定回答要用needn't或don't have to来表达。

►—Must I hand in the paper today?——我今天必须交作业吗？—Yes, you must.——是的，你必须交。

—No, you needn't/don't have to.——不，你不需要。

(2)表示推测，意为“一定”，用于肯定句。

►At 29 Russell must be one of the youngest ever international referees.29岁的拉塞尔想必是迄今为止最年轻的国际裁判之一。

英语情态动词含答案解析一、情态动词单项选择题1．Tom, you ________ cross the road now. The traffic light is still red.A．couldn’t B．wouldn’t C．mustn’t D．needn’t【答案】C【解析】【详解】句意：汤姆，你现在不能过马路。

交通灯仍然是红色的。

考查情态动词。

couldn’t不能够；wouldn’t不会；mustn’t禁止，一定不；needn’t不必。

根据“The traffic light is still red.”可知红灯亮时禁止过马路。

故选C。

2．—Must I return the book this week?—No, you ________. You can ________ it for 20 days.A．mustn’t; keep B．needn’t; borrow C．don’t have to; keep D．mustn’t; lend【答案】C【解析】【详解】句意：——我必须在本周还书吗？——不，你不必这样做。

您可以借20天。

考查情态动词的一般疑问句。

在以must开头的一般疑问句，肯定回答用must；否定回答用need’t或者don’t have to，故排除A和D。

第二空根据“it for 20 days.”可知该空是延续性动词，borrow是短暂性动词，因此排除B。

故选C。

3．In China, all passengers ________ wear protective masks while using public transport. A．should B．need C．can D．must【答案】D【解析】【分析】【详解】句意：在中国，所有乘客在乘坐公共交通工具时必须佩戴防护口罩。

考查情态动词。

should应该；need需要；can可以；must必须。

根据“wear protective masks”和生活常识可知，是必须要佩戴防护口罩，因此must符合句意。

高考英语情态动词辨析运用练习题30题答案解析1.She have known the answer,for she looks so confident.A.mustB.canC.shouldD.need答案解析：A。

“must”在这里表示肯定的推测，因为她看起来很自信，所以一定知道答案。

“can”表示能力或可能性，不太符合此处语境。

“should”表示应该，不符合推测的意思。

“need”表示需要，也不符合。

2.He speak three languages fluently.A.canB.mustC.shouldD.need答案解析：A。

“can”表示能力，他能流利地说三种语言。

“must”表示必须或肯定的推测，这里不是推测也不是必须的意思。

“should”表示应该，不符合语境。

“need”表示需要，也不合适。

3.You finish your homework before you go out to play.A.mustB.canC.shouldD.need答案解析：A。

“must”表示必须，你必须在出去玩之前完成作业。

“can”表示能力或可能性，这里不是能力或可能性的意思。

“should”表示应该，语气没有“must”强烈。

“need”表示需要，不符合语境。

4.It be raining outside,for I can hear the sound of rain.A.mustB.canC.shouldD.need答案解析：A。

“must”表示肯定的推测，因为能听到雨声，所以一定在下雨。

“can”表示能力或可能性，不太符合此处语境。

“should”表示应该，不符合推测的意思。

“need”表示需要，也不符合。

5.She have forgotten to bring her book,for she is looking everywhere for it.A.mustB.canC.shouldD.need答案解析：A。

情态动词一、考点、热点回顾【词汇辨析】1.sometimes/ some times/sometime/ some time：sometimes：“有时”=at times. He is sometimes late for school.some times：“几次” I have been to Nanjing some times。

sometime：“某一时刻” I bought it sometime last spring。

We’ll meet again sometime next week。

some time：“一段时间” We have to stay here for some time。

2。

many/ much/ a few/ a little/ few/ little(1）many修饰可数名词，much修饰不可数名词；都表示许多。

例如：许多书许多牛奶（2)a few和a little都表示"有一点儿"，侧重于肯定，相当于"some”，但a few修饰可数名词,a little修饰不可数名词,例如:He has a few friends in London。

———Would you like some coffee？———Yes，just a little.（3）few和little表示”几乎没有”,侧重否定。

few后接可数名词，little后接不可数名词。

例如：He is a strange man. He has few words。

Hurry up, there is little time left。

【固定搭配】加-ingbe busy doing sth.忙于做……eg: Mother is busy cooking.look forward to + doing sth. 期待做……eg: Tom looks forward to seeing his father again。