高中英语情态动词练习
1、Many a time，the Chinese government urged that American government stop selling advanced
weapons to Taiwan，but it__________ listen，__________Sino-US relations.
A. won’t；damaging
B. wouldn’t；damaging
C. shouldn’t; to damage
D. wouldn’t：to damage
2、it have been the failure to pick up directions from the ground control that caused the air crash?
A. Must
B. Could
C. Would
D. Should
3、— Look! It’s raining again.
— Why _____ it rain on Sundays? We are always staying inside! What a nuisance!
A．need B．must C．does D．should
4、 ---Why ______ you stay in the countryside, where it is not convenient to go shopping?
---- But I’ve found it rather valuable for my health.
A .can B. must C. may D. shall
5、一What does the sign over there read?
一“No person ________ smoke or carry a lighted cigarette，cigar or pipe in this area．”
A.will
B. may
C. shall
D.must
6、—Have you checked the engine?
—Yes, I did twice; there be anything wrong with the car.
A. won’t
B. mustn’t
C. needn’t
D. shouldn’t
7、The doctor recomm ended that you swim after eating a large meal.
A.wouldn’t
B.couldn’t
C.needn’t
D.shouldn’t
8、His failure in the exam suggested that he _______ the teacher's instructions.
A. can't have followed
B. needn't have followed
C. mustn't have followed
D. shouldn't have followed
9、The missing children haven’t been found yet. Something terrible ________ to them.
A. may happen
B. should have happened
C. must happen
D. might have happened
10、I don't know how he _______that I'm lazy , _______he's been in bed all day.
A. dare to say , that
B. dares say , while
C. dare say , as
D. dares to say, when
11、— You didn’t wait for Elizabeth last night, did you?
— Yes, but we ______. She didn’t come at all.
A. don’t have to
B.needn’t have
C. need to
D. should have
12、I’m glad that you have managed to come, but you _____ have brought wine．We’ve got plenty.
A wouldn’t B．needn’t C．mustn’t D．couldn’t
13、The school rules state that no child ____________ be allowed out of the school during the day,
unless accompanied by an adult.
A. could
B. shall
C. might
D. should
14、The famous writer often says that he ________ so much without the support and
encouragement from his wife.
A. shouldn’t achieve
B. shouldn’t have achieved
C. couldn’t achieve
D. couldn’t have achieved
15、—Did you lock the door？—No, I ____, but I forgot.
A. should
B. must have
C. must
D. should have
16、 ----Who’s the man giving the speech?
---Well, if you ______know, his name is Lyric.
A. may
B. can
C. shall
D. must
17、—Mum, I am sorry, but I failed in the English exam.
—So you __________ get the MP4 you want. I am sorry, too.
A. shall not
B. might not
C. needn’t
D. shouldn’t
18、According to the school rule, no student go out during the class without the teacher’s
permission.
A. could
B. need
C. shall
D. would
19、You ______ pay too little attention to your reading skills, as they are so important.
A. should
B. mustn’t
C. can’t
D. needn’t
20、The Chinese government advocates that countries along the modern silk
road work together and share future success.
A. must
B.might
C.should
D.could
21、If I _____ fall in and can’t come for work, please find someone to cover for me.
A. must
B. will
C. should
D. may
22、Don’t you think it essential that every resident of Nanjing spare no effort to make
contributions to Nanjing Youth Olympic Games?
A．should B．will C．shall D．would
23、 ---How do you find your new teacher?
---Excellent. We ______hope for a better one. All the students think highly of him.
A. should
B. might
C. mustn’t
D. couldn’t
24—Hey, __ the boy with a blue backpack come over here? We need another hand with this table. —Me? Oh, sorry, but I’ve got an injury in my leg.
A. shall
B. would
C. should
D. must
25、— How is the smog control going on in our capital city?
— It couldn’t be worse. You ________ believe Beijing upgraded the smog alert from yellow to orange and then red again yesterday.
A. won’t
B. mustn’t
C. needn’t
D. shouldn’t
26、— I’m really surprised that a policeman in his car ______ have hit several common
pedestrians, killing one and injuring three.
— Yes. If one ______ ask for trouble, what can we say?
A. would; will
B. should; must
C. must may
D. need; dare
27、― Why ______ you stay in the countryside, where it is not convenient to go shopping?
―But I’ve found it rather valuable for my health.
A. can
B. must
C. may
D. shall
28、If Doric continue doing things like that, he _______ face the music one day！
A. can
B. should
C. would
D. shall
29、No student _________ go out of the school campus after 10:00 at night without permission
according to the school regulations.
A. shall
B. must
C. would
D. should
30、Mr.Smith is on time for everything. How he be late for the ceremony?
A. will
B.can
C.shall
D.may
31、—Shall I inform him of the change of the schedule right now?
—I am afraid you______, in case he comes late for the meeting.
A.will
B.must
C.may
D.can
32、—It’s amazing that Beijing and Zhangjiakou have won the bid for the 2022 Winter Olympics！
—Sure it is！The government __________ have made great efforts！
A．could B．should C．might D．must
33、It’s nearly eight o’clock．I must hang up and get down to work．My boss be here at any
moment．
A．should B．must C．could D．would
34、—What is an ideal team leader like?
—He ______ be responsible, determined and creative．
A．can B．may C．would D．should
35、一I'm going to Tibet for some days.
一Really? How I wish I ________get away for a while.
A. must
B. shall
C. could
D. need
36、 ---_____ you always question everything I say?
---Sorry if I make you unhappy; but it’s my habit to question before I believe.
A. Shall
B. Will
C. Must
D. Can
37、—The task is challenging and demanding. Who do you think can make it?
—my partner have a try? I think she is the right person to do it.
A．Will B．Might C．Should D．Shall
38、The little child ________ go out alone at night, so he ________ walk in the dark that night.
A. daren't; didn't dare to
B. doesn't dare; dare not
C. isn't dare to; dared not to
D. doesn't dare to; dare not to
39、English is a language that many people around the world________ not speak perfectly but
____ at least understand.
A. may; can
B. would; might
C. will; must
D. could; might
40、---I ________ myself more---it was a perfect day.
---Me, too. It’s years ________ I enjoyed myself so much.
A.couldn’t have enjoyed; since
B.needn’t have enjoyed; since
C.wouldn’t have enjoyed; before
D.shouldn’t have enjoyed; before
1、B
2、B
3、B
4、B
5 C
6、D
7、D
8、A
9、D
10、D
11、B
12、b
13、B
14、D
15、D
16、D
17、A
18、C
19、C
20、C
21、C
22、A
23、D
24、B
25、A
26、B
27、B
28、D
29、A
30、B
31、B
32、D
33、A
34、D
35、C
36、C
37、D
38、A
39、A
40、A
高中英语情态动词精讲与解析 概说 助动词(auxiliary)主要有两类：基本助动词(primary auxiliary)和情态助动词(modal auxiliary)。基本助动词有三个：do, have和be；情态助动词有十三个：may, might; can, could; will, would; shall, should; must, need, dare, used to, ought to. 上述两类助动词的共同特征是，在协助主动词构成限定动词词组时，具有作用词的功能： 1）构成否定式： He didn't go and neither did she. The meeting might not start until 5 o'clock. 2）构成疑问式或附加疑问式： Must you leave right now? You have been learning French for 5 years, haven't you? 3）构成修辞倒装： Nowhere can he obtain any information about his sister. Hardly had he arrived when she started complaining. 4）代替限定动词词组： A: Who can solve this crossword puzzle? B: Tom can. A: Shall I write to him? B: Yes, do. 情态助动词的特征 基本助动词与情态助动词最主要的区别之一是，基本助动词本身没有词义，而情态助动词则有自己的词义，能表示说话人对有关动作或状态的看法，或表示主观设想： What have you been doing since? （构成完成进行体，本身无词义） I am afraid I must be going. （一定要） You may have read some account of the matter. （或许已经） 除此之外，情态助动词还有如下词法和句法特征： 1）除ought和used以外，其他情态动词后面只能接不带to的不定式。如果我们把ought
高中英语语法之情态动词 （一）情态动词的定义：情态动词表示说话人对某一动作或状态的态度。 （二）情态动词的特点：1）有一定词义；2）不受主语人称和数的变化影响；3）与主要动词 的原形（或称不带to的不定式）一起构成谓语（除ought to作固定词组看待）。 情态动词无人称和数的变化, 情态动词后面跟的动词需用原形,否定式构成是在情态动词后面加"not"。个别情态动词有现在式和过去式两种形式, 过去式用来表达更加客气, 委婉的语气, 时态性不强, 可用于过去，现在或将来。情态动词属非及物动词，故没有被动语态。 He could be here soon. 他很快就来。We can't carry the heavy box. 我们搬不动那箱子。 I'm sorry I can't help you. 对不起，我帮不上你。 基本助动词与情态助动词最主要的区别之一是，基本助动词本身没有词义，而情态助动词则 有自己的词义，能表示说话人对有关动作或状态的看法，或表示主观设想： What have you been doing since? （构成完成进行体，本身无词义） I am afraid I must be going. （一定要） You may have read some account of the matter. （或许已经） 除此之外，情态助动词还有如下词法和句法特征： 1）除ought和used以外，其他情态动词后面只能接不带to的不定式。如果我们把ought to 和used to看做是固定词组的话，那么，所有情态动词无一例外地只能接不带to的不定式：We used to grow beautiful roses. I asked if he would come and repair my television set. 2）情态助动词在限定动词词组总是位居第一：They need not have been punished so severely. 3）情态助动词用于第三人称单数现在时的时候，没有词形变化，即其词尾无-s形式： She dare not say what she thinks. 4）情态动词没有非限定形式，即没有不定式和分词形式，也没有相应的动名词： Still, she needn't have run away. 5）情态助动词的“时”的形式并不是时间区别的主要标志。在不少场合，情态助动词的现在 时和过去时形式都可以表示现在、过去或将来时间：Would you mind very much if I ask you to do something? She told him he ought not to have done it. 6）情态助动词之间是相互排斥的，即在一个限定动词词组中只能出现一个情态助动词，但 有时却可以与have和be基本助动词连用：You should have washed the wound. Well, you shouldn't be reading a novel. （三）情态动词有四类：①只做情态动词：must,can(could),may(might),ought to ②可做情态动词又可做实义动词：need,dare ③可做情态动词又可做助动词：shall(should),will(would) ④具有情态动词特征：have(had,has) to,used to ⑤情态动词表猜测 （四）情态动词的基本用法 1. can (could) 1）表示能力，could主要指过去时间。 Two eyes can see more than one. 两只眼比一只眼看得清。 Could the girl read before she went to school? 这女孩上学前能识字吗？ 2）表示可能（理论上或是逻辑判断上）。 The temperature can fall to –60℃, that is 60℃ below freezing. 气温可降至—60℃，也就是零下60℃。 t) have enough money for a new car. 他不可能有足够的钱买新车。 He can′ t (couldn′ re walking around in the wood. You could start a fire. You mustn′ t smoke while you′
情态动词的用法 A. can; could; be able to Can 1. 表示“能力”(此时过去时是could) 2.表示许可、请求，“可以”。--Can/Could I go now? 3 表示推测, 把握很大,could也可表推测,把握比can小。 --Look! Someone is coming! Who can it be? --It can?t be him. He has gone to Paris.（不可能）/ He could be here soon. 他很快就来。 4 表示感情（惊异/不耐烦）“究竟，到底”（主要用于否定句，疑问句和感叹句中。） How can you be so foolish? What can it possibly be? 到底那是怎么一回事? They can?t be working at this time of day. 5 肯定句中客观存在的可能性。“有时会，偶尔” It can be quite windy there, especially in spring. Could 1.表示能力，can 的过去式，过去能够 Could you speak English then? 那时候你会说英语吗? 2. 请求允许（委婉语气）（问句的答语不用could，而用can，） Could [Can] I use your pen? ” “Yes, of course you can.”/ No, I?m afraid not. 3. 表示推测可能性（肯，否，疑） We could go there this summer. 今年夏天我们可能要去那儿。(将来可能性) You could be right, but I don?t think you are. 你可能是对的，但我并不认为你是对的。 4. could have done ①对过去推测，可能已经。。。②本来能够却没做，差点就 He can?t [couldn?t] have seen her there. 他不可能在那儿见到她。 He could have gone home. 他可能已回家了 He could have told her, but he didn?t choose to. 他本来可以告诉她的，但他却没有。 B. may 和might 1.表示允许﹑许可，might提问更委婉。 ---May/Might I watch TV after supper? ---Yes, you may./ Yes, please./ Certainly. ---No, you mustn't. / No, you may not. / No, you can?t./No, you?d better not. 2. 表示推测，有“或许”、“可能”的意思。might把握更小。疑问句用can/ could. ?He may/might be right./ I hear there may be a few copies left. ?He may/might come today (tomorrow). 3. may表示祝愿，倒装。May +主语+动词原形。May you succeed!/May you all be happy. ☆may [might] as well…意为“不妨”、“还是…为好”等，用might 比用may 语气更委婉。如：I?m ready，so I might as well go now．我已准备好，因此不妨现在就走。 There?s nothi ng to do, so I may [might] as well go to bed. ☆may well... 完全可能 C. must, have to Must 1. 表示“必须”。否定式mustn?t表示“不可以”、“不准”、“禁止”等。 Everybody must obey the rules../You mustn?t lend it to others./You mustn?t speak like that to your mother. ☆在回答有“must” 的询问时，--- Must I go now? --- Yes, you must. ---No, you needn?t. / No, you don?t have to.
英语情态动词的用法大全附解析 一、初中英语情态动词 1．—We've got everything ready for the picnic. —Do you mean I __________ bring anything with me? A. can't B. mustn't C. couldn't D. needn't 【答案】 D 【解析】【分析】句意：—我们已经为野餐准备好了一切。—你的意思是我不必带任何东西吗？A. can't 不能；B. mustn't 表示禁止，一定不要；C. couldn't不能，表示过去时态；D. needn't不必。结合句意，故选D。 【点评】本题考查情态动词的用法。 2．—How amazing this robot is! —Wow, it has video cameras in its eyes, so it “see” and interact with pe ople. A. may B. can C. must D. should 【答案】 B 【解析】【分析】句意：—这个机器人多么惊人啊！—哇，在它的眼睛里有摄像机，因此它能看见和人打交道。A. may 可以，可能；表示许可，B. can 能；表示能力，C. must 必须；D. should应该；根据it has video cameras in its eyes,可知是有能力看见，故选B。 【点评】考查情态动词辨析。熟记情态动词的含义和用法。 3．—Where is George? —He _______ be here just now. His coffee is still warm. A. need B. can't C. must D. shouldn't 【答案】 C 【解析】【分析】句意：——乔治在哪里？——他刚才一定在这里，他的咖啡还是热的。A. need需要； B. can't 不能，不可能（表示推测）； C. must 必须，一定（表示推测）； D. shouldn't不应该；根据His coffee is still warm.可知表示肯定推测一定在这儿；故答案为C。 【点评】考查情态动词。掌握情态动词表推测时的意义和用法。 4．— Sorry, I forgot to take money with me. Maybe I can't buy the book you like. — Mum, you ______ worry about it. We can pay by Alipay （支付宝）. A. can't B. needn't C. mustn't D. shouldn't 【答案】 B 【解析】【分析】句意：——对不起，我忘记带钱了。也许我不能买你喜欢的书。——妈妈，你不用担心。我们可以用支付宝支付。A. can't不能，指不允许或否定推测；B. needn't 不需，指没必要；C. mustn't不能，表禁止；D. shouldn't不应该，表建议。根据句意语境，本句是说妈妈不需要担心，故答案为B。 【点评】考查情态动词。理解句意并掌握情态动词的意义和用法区别。
情态动词专项练习（一） 1. I __________ you, because I thought I must be wrong. A. dare not ask B. dare not to ask C. dare not asking D. dare to not ask 2. There __________ some flowers in the garden. A. were used to be B. used to be C. uses to be D. used to be having 3. ―__________ I take it out?‖―I′m sorry, you __________.‖ A. Could …couldn′t B. Might…might not C. Could…can D. May…can′t 4. You were stupid to climb the tree. You __________ hurt yourself. A. may B. might C. will D. might have 5. You __________ those letters. Why didn′t you ? A. should post B. should have posted C. must have posted D. ought to post. 6. All the lights are on, the Smiths __________ up. A. must get B. is getting C. must be getting D. would get 7. He __________ lead a horse to the water but he __________ not make it drink. A. will…can B. may…can C. may…dares D. dare…can 8. ―Need we do this job now?‖―Yes,__________.‖ A. you need B. you should C. you must D. you can 9. __________ to have lunch with us today? A. Do you likes B. Would you like C. Will you liked D. Have you liked 10. He said that you __________ watch TV all the evening if you wished. A. may B. must C. can D. might 11. –Is John coming by train? --He should, but he __________ not. He likes driving his car. A. must B. can C. need D. may 12. Peter __________ come with us tonight, but he isn′t very sure yet. A. must B. can C. may D. will 13. Michael __________ be a policeman, for he′s much too short. A. needn′t B. can′t C. shouldn′t D. won′t 14. I thought you __________ be hungry, so I have brought you some cakes. A. may B. might C. can D. could 15. I wonder how he __________ that to the teacher. A. dare to say B. dare saying C. not dare say D. dared say 16. Come on! We __________ hurry because there isn′t much time left. A. may B. must C. can D. need 17. Amy did best in the English test. She __________ hard last week. A. must have working B. should have worked C. should work D. must work 18. The fire spread through the hotel very quickly but everyone __________ get out. A. had to B. would C. could D. was able to 19. –--I stayed at a hotel while in New York. ---Oh, did you? You __________ with Barbara. A. could have stayed B. could stay C. would stay D. must have stayed 20. It′s nearly seven o′clock. Jack __________ be here at any moment. A. must B. need C. should D. can 专项练习（二） 1. Jean have kept his promise. I wonder why he changed his idea. A. must B. should C. need D. would
高中英语情态动词详解 1. 表示请求和允许: can，could ，may，might. 过去式使语气更委婉，答语应用原形。 --- Could I use your computer tomorrow morning? --- Yes，you can.( 否定回答可用：No，I’m afraid not.) 1)can表示理论上的可能性，指某事或情况可能发生，但并不说明实际上真的发生. Children can be very tiring. 2)对现在事情的推测：情态动词+do 对过去事情的推测：情态动词+have done 对已完成事情的推测：情态动词+have done 3)反意问句： He may know the plan，doesn’t he? You must have studied English before，haven’t you? You can’ t have been caught in the rain last night，were you? 3．can & be able to 在肯定句中can表示有“能力”做，be able to表示通过想办法/努力等而能够做成了某一件事，相当于managed to do…或succeeded in doing sth. Birds can fly. The fire spread through the hotel very quickly but everyone was able to get out. 4. may / might as well do sth“还是…好”、“不妨” You might as well tell me the truth. 你还是把真相告诉我的好。 5. must和have to 1) must表示的是说话人的主观看法，而have to强调客观需要。 2）否定形式含义不同。mustn’t禁止，不许可，don’t have to不必 3) must 偏要（做令人不快的事）eg. Must you shout so loudly? 6. shall和should 1)表示说话人征求对方意见和向对方请示，用于第一、三人称。 When shall my father be able to leave hospital? Shall2) 用于第一、三人称2) 用于第二、三人称，表示说话人给对方的命令、警告、允诺或威胁以及说话人的决心。 You shall go with me (命令)/ You shall have the book when I finish it.33（允诺） He shall be punished （威胁）/ Nothing shall stop me from doing it. (决心)
一、情态动词用法 1.情态动词的具体用法 A.能干can/could do; (经过努力)能干be able to (have the ability to do, be capable of doing) B.必须干/不得不干must / have to do; 不许干：mustn’t do C.(经允许)可以干may/ might do; 不可以干：may not do D.应该干should /ought to/ be to/ be supposed to do E.将要干will/would/shall do; (按法律，许诺，命令，威胁，第二三人称中) 将干shall do F.(某段具体时间)常干would do; (现在不做，过去常做) used to do G.宁愿做would rather do; 最好做had better do; 不妨做might as well do H.需要做need do ; 敢做dare do 2.情态动词表猜测 A.一定是must be ;一定已经干了某事must have done sth.; 一定不是can’t/couldn’t be ; 一定没干过某事can’t/couldn’t have done sth. B.可能（不）是may/might (not ) be; 可能已经（没）干某事may/might (not) have done sth. 3.情态动词与虚拟语气 A.本应该干某事（带有批评责备之意）should/ ought to have done sth.；本不该做了某事而做了shouldn’t /oughtn’t to have done sth B.本不必干某事needn’t have done sth. C.本可以干某事can/could have done sth. D.本（不会）干某事would (not) have done sth. E.真希望做过某事would like to have done sth. F.Should 在表建议的从句中： (a)It’s high time that sb. should do/did sth (b)It’s important sb. (should) do sth. (c)I suggest sb. (should ) do sth. 二、理解情态动词 Lucy is an outgoing lady. She can play many kinds of musical instruments. Actually, she could play the piano when she was 8 years old. Lucy also keeps taking exercise every day. She says that she has to do some sports because she must keep slim. “You shall get fat soon if you don’t take exercise every day.” She usually says to her friends. As for her, an elegant lady should try to keep fit. However, last week, she found that she might put on weight and she worried and decided to lose her weight. And these days she is always thinking that she may succeed soon if she tries all her best. However, she is always lack of time because she ought to take care of her children. One night after supper, she walked quickly in order to go dancing at the Tomorrow Park and she was late. On her way, she thought that the dancing must have
高中英语情态动词用法归纳与练习 A: can / could = be able to 1 表示能力两种时态can (could)，其他时态要用be able to的形式 He can speak French. Was/were able to 可以表示成功做成某事的含义* managed to do / succeeded i n doing With our help, he was able to build the house. 2 表示请求或许可Could 比Can 更加客气* may Can I go now? Yes, you can. 3 表示推测或可能性，常用于否定句和疑问句 Can he be at school? Today is Sunday. He can't be at school. Can’t couldn’t/ Can ? Could? have done There is no light in the room. Can she have gone to bed? She can’t have gone to school----- it’s Sunda y. Could have done 可用在肯定句中表示过去存在的可能性* may have done She could have gone out with some friends yesterday. Could have done 可以表示虚拟语气 某事可能发生（并没有发生） It was silly to throw the TV out of the window. It could have hit somebody. 批评某人没有完成某事(本可以做某事) You are late again. You could have got up earlier. 4 can 表示客观上的可能性* Anybody can make mistakes. B: may and might 1 表示请求和允许类似用法can could(更加口语化) May I watch TV now? Yes, you may. 2 表示可能性; 猜测might比may更加不确定may/might have done 对过去的揣测* He may be busy these days. May not 可能不；不可能；一定不可 3 表示祝愿Wish you success! May you succeed!* C: must and have to 1 表示必须；一定要可以用have to 代替 must 现在；将来的必须而且是主观看法* have to 有多种时态而且强调客观情况 I really must stop smoking now. I had to leave early because I wasn’t feeling well. Must I come here?
情态动词 情态动词是高考考查的重点语法项目之一，2005年全国17套高考试题对此都有考查。下面就近几年来高考试题中出现的情态动词的考点进行归纳分析，以便同学们复习掌握。 一、情态动词表推测 1. 肯定的推测一般用must, should, may（might）或could（不用can），其中，must的语气最强，译为“肯定”、“准是”、“想必是”；should的语气次之，译为“很可能”、“应该”，指按常理推测；may（might），could的语气最弱，译为“也许”、“可能”。 ①Helen _______ go on the trip with us but she isn’t quite sure yet. （2005年安徽卷） A. shall B. must C. may D. can ②—I’ve taken someone else’s green sweater by mistake. —It ___ Harry’s. He always wears green. （2005年广东卷） A. has to be B. will be C. mustn’t be D. could be ③I have lost one of my gloves. I _______ it somewhere.（2005年北京春季卷） A. must drop B. must have dropped C. must be dropping D. must have been dropped ④If I ____ plan to do anything I wanted to ,I’d like to go to Tibet and travel through as much of it as possible. （2005年湖北卷） A. would B. could C. had to D. ought to 2. 否定推测分为两种情况： 1）语气不很肯定时，常用may not, might not或could not，译为“可能不”、“也许不”。 You might just as well tell the manufacturer that male customers ______ not like the design of the furniture. （2004年上海春季卷） A. must B. shall C. may D. need 2）否定语气较强时，则用can’t，译为“根本不可能”、“想必不会”，表示惊异、怀疑的感情色彩。 ①—Do you know where David is? I couldn’t find him anywhere. —Well. He ______ have gone far——his coat’s still here.（2005年湖北卷） A. shouldn’t B. mustn’t C. can’t D. wouldn’t ②— Isn’t that Ann’s husband over there? — No, it _______ be him I’m sure he doesn’t wear glasses. （2004年全国卷Ⅰ） A. can’t B. must not C. won’t D. may not 3. 疑问句中的推测，往往用can或could。 Mr. Bush is on time for everything. How ______ it be that he was late for the opening ceremony？（2001年上海春季卷） A. can B. should C. may D. must 4. 对已发生事情的肯定推测常用“must, may, might等+完成式”；否定推测常用“can, could, may, might等+完成式”。 ①I was on the highway when this car went past followed by a police car. They _______ at least 150 kilometers an hour.（2005年重庆卷） A. should have been doing B. must have been doing C. could have done D. would have done ②He _______ have completed his work; otherwise, he wouldn’t be enjoying himself by seaside. （2005年北京卷）
英语情态动词用法详解 一、单项选择情态动词 1．Look! There are so many mistakes in your composition. You ________ have fixed full attention on it. A．can B．should C．need D．might 【答案】B 【解析】 【详解】 考查情态动词。句意：看！你的作文里有那么多的错误。你本应该把所有的注意力都集中在它上面的。表示“本应该做但实际上没有做”应该用should have done结构，can have done 表示可能；need表示需要；might have done表示可能做过某事；故选B。 2．---Hi, Johnson, any idea where Susan is? ---It is class time, so she __________ in the classroom now. A．can be B．must have been C．might have been D．should be 【答案】D 【解析】 考查情态动词的用法。A. can be可能，可以是；B. must have been一定（对过去事实肯定的推测）；C. might have been可能（对过去事实肯定的推测）；D. should be应该是。句意：—知道苏珊在哪里吗？—现在是上课时间，她应该在教室里。故答案选D。 3．The room is so clean. He ________ have cleaned it yesterday evening. A．will B．need C．can D．must 【答案】D 【解析】 【详解】 考查情态动词表推测。句意：房间如此干净，他一定是昨天晚上打扫过了。must have done 表示对过去发生的事情有把握的猜测，意思是“一定（做过）”，故D项正确。 4．— Excuse me, do you mind if I open the window? — Well, if you __________. I can put on more clothes. A．can B．may C．must D．shall 【答案】C 【解析】
情态动词专项讲解 1. China is developing its high-speed train technology fast, so it _____be good enough to catch up with the best. A. may B. might C. must D. should 2. Then some other interesting reasons appear, such as “It's so smoggy that I ______find my way to office." A. mustn’t B. won’t C. can’t D. shouldn’t 3. "The world is big, and I want to see it," wrote a teacher in her resignation letter. _____ you quit your job to travel the world A. Must B. Might C. Should D. Would 【答案揭晓】CCD 一、情态动词的定义 情态动词是一种本身有一定的词义，但要与动词原形或其被动语态一起使用，给 谓语动词增添情态色彩，表示说话人对有关行为或事物的态度和看法，认为其可 能.应该或必要等。情态动词后面加动词原形。 1. No driving electric motorbikes in some areas is a rule that we shall obey in Fuzhou.
必须.一定（法律.法规等）动 词原形 2. Women who are exposed to second-hand smoke during their pregnancy can be at risk of abortion.能，会，可以(表示有能力或机会) 动词原形 二、常考情态动词的关键用法 (一) can 1. －Jim，it is time you went to bed．You need to get up early tomorrow. －It’s not f air，Mary can stay up till ten hut I have to go to bed at eight. 可以(表示允许) it were not for the fact that she can't sing，I would invite her to the party. 能，会，可以(表示有能力) 3. Luckily, iron can be reworked and mistakes don't have to be thrown away 能够，可以(表示某事物的特点) can be really difficult to get along with at times even though he’s a
高考英语情态动词讲解标准化管理处编码[BBX968T-XBB8968-NNJ668-MM9N]
（一）情态动词常考点 （一）表能力 如：I am starving to death。I can eat two bowls of rice now。 （现在的能力）我快饿死了，现在我能吃两碗米饭。 If you have a good sleep，you will be able to work out this problem。 （将来的能力）如果你好好睡一觉，你将能够解出这道题。 The fire spread through the hotel very quickly but everyone was able to get out。 （过去有能力做并且成功的做了某事）尽管这场大火迅速蔓延到了整个宾馆，但是每个人都能够逃出去。 I could have worked out the problem，but I didn’t。 （过去有能力做但未做）我本来可以解决这个问题，但没有解决。 （二）表推测（可能性） 1.可能性可分为客观的可能性和具体事情实际发生的可能性两种。所谓客观的（理论的）可能性即并不涉及具体某事是否会发生，此种用法常常可以说明人或事物的特征。情态动词can可用于肯定句中表示客观的（理论的）可能性，而表示具体事情实际发生的可能性时，can一般不用于肯定句。如：
（2）表示具体事情实际发生的可能性时，may，must常用于肯定句，一般不用于否定句和疑问句（may not表示“可能不”）；can常用于否定句、疑问句或感叹句中，表示疑惑、惊讶或不相信等意思；could既可用于肯定句，又可用于否定句、疑问句中。如： This can’t/ couldn’t be done by him。（表不相信） 这不可能是他做的。 This may not be done by him。（表不确定） 这可能不是他做的。 He could be on his way home now。（could不如may/ might常用）
一、情态动词无人称和数的变化，不能单独做谓语，只能和行为动词或状态动词构成谓语 二、情态动词分为：情态助动词：can(could)、may(might)、must、have to (had to )、ought to 、 shall(should)、will(would) 12个 半情态助动词：dare、need、used to、had better、would better(5个) 三、情态助动词 1.can and could 1)ability：be able to do /manage to do/succeed in doing sth. eg.The army can defeat their enemy. eg.The army is able to defeat their enemy. eg.The army succeed in defeating their enemy. 2)permission:eg.Can I smoke here? eg.You can’t smoke here. 3)possibility:用在否定句、疑问句、感叹句中- eg.This can’t be done by him. 当被用在肯定句中时，表达的是理论上的可能性，不涉及是否真的会发生 eg.even expert drives can make mistakes. 要表达现在或者将来的可能性，用may /might或could. eg.I may leave for Beijing next month. 但在特殊疑问句中，或与副词hardly、only等连用的陈述句中表达可能 性只用can/could Eg.where can the noise be coming from? eg.It can hardly be the postman,he comes only in the morning. 4)有时会：the road can be blocked. 5)could 表示轻微的怀疑或委婉的看法 I’m sorry I couldn’t lend you the book now. His story could be true,but I hardly think it is. 6)could 表示委婉的请求，主要用于疑问句，不用于肯定句 Could you lend me some money? Yes,I can /No,I am afraid not. 7)could 的常用结构：could+动词+比较级“非常，再.....不过了” It couldn’t be better. Couldn’t +过去分词+比较级“非常，再.....不过了” They couldn’t have tried harder to make me eel welcome. Can’t..too..=can never too“无论怎样...也不为过,越...越好” I can’t thank you too much.I owe my progress to you. Can’t (help/choose) but do/can but +动词原形“不得不，只好” We can but agree with him. Can’t help doing 忍不住，不得不 I can’t help laughing Can’t be (it) 控制不住，没有办法 It can’t be helped Can’t....without 没有...就不能 One can’t succeed without perseverance.