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1、-高考英语情态动词讲解及习题(附答案)-第 9 页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 cant. 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
2、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 cant 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 havent been able to get in touch with her.我一直没能和她联系上。2)
3、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 cant. -No, you mustnt.-No, youd better not.2.3表示猜
4、测，通常只用于陈述句例如：You may be right.你可能是对的。 2.4过去式might表示的语气更加委婉、客气例如：Might I use your pen for a while?我能用用你的钢笔吗？2.5在口语中can可以代替may表示许可，但can较随便，may更正式例如：Can I use your bike, John?约翰，我可以用一下你的自行车吗？ May I have a look at your license please, sir?先生，我可以看一下你的执照吗3.must 的用法3.1表义务，“必须”例如：You must talk to them about
5、 their study.你必须同他们谈谈关于他们学习的事。 3.2在否定结构中表不许、禁止例如：You mustnt leave here.你不能离开这儿。 3.3表坚定的建议例如：You must come and see us as soon as you get to Shanghai.一到上海你就得马上来见我们。 3.4表推测，暗含有很大的可能性例如：He must be ill. He looks so pale.他肯定是病了。他的脸色那么苍白。注意may 暗含的可能性较小，must 暗含的可能性较大。3.5关于must的简短回答：例如：Must I clean the dinin
6、g room at once? 我必须马上打扫餐厅吗？-Yes, you must. -No, you neednt. -No, you dont have to.4.have to的用法have to 虽属于情态动词，但它有人称、数的变化，它的疑问句否定句的构成也和其他情态动词有所不同。4.1 have to表客观的需要和义务，must表主观认识例如：I missed the train, so I had to take a taxi.我没搭上火车，所以我只得打的。4.2在疑问句和否定句中，have to多用助动词do构成，must则直接提前或加not。例如：Did he have to
7、do it?他得做那件事吗？ He didnt have to do it.他不需要做那件事。4.3在否定句中，have to表示不需要，must表不允许。例如：You dont have to go there.你不需要去那儿。 You mustnt go there?你不可去那儿。4.4虽然must可以用在过去时态中，但是have to更能直接了当的表达过去时间概念。例如：She must see Hubert that very night.她必须在那个晚上见到休伯特。 I had to leave at six yesterday.我得在昨天6点离开。5.need 的用法need既可用
8、作情态动词，又可用作实义动词。作情态动词时，没有数和人称的变化，后接动词原形；作实义动词时，有数的变化和人称的变化，后接带to的不定式。5.1用于否定句，表“不必”例如：You neednt worry.你不必担心。 I dont think you need worry.我想你不必担心。 5.2用于疑问句，表“需要吗”例如：Need you go? 你得去吗？-No, I neednt. 不必。-Yes, I must. 是的，我必须去。 5.3 need用作实义动词时，要注意始终以实义动词的标准贯彻到底例如：（正确）Do you need to go there?（错误）Do you ne
9、ed go there?6.will和would的用法6.1 will，用于构成将来时是助动词。用于表示“意志”“决心”“请求”是情态动词。would亦同理。例如：Hell be here this afternoon.今天下午他会来这儿。（助动词） Will you tell her that Im here?请您告诉她说我在这儿，好吗？（情态动词） 6.2用于各种人称，表示“意志”“决心”“允诺”例如：I will try.我愿一试。 6.3在疑问句中用于第二人称，提出请求或询问例如：If you want help， let me know, will you?如果你需要帮助，让我知道，
10、好吗？ Will you type this, please?请打印这个，好吗？ Wont you sit down?请坐下，好吗？6.4 would比will客气委婉例如：Would you help us, please?请您帮助我们，好吗？（表请求） Id go there with you.我要和你一块到那儿去。（表意愿） Dad wouldnt allow it.爸爸不会允许这件事。（表许可）7.shall和should的用法7.1 shall用于构成将来时是助动词，shall用于征求对方的意见，表示“决心”是情态动词例如：Perhaps I shall pay a visit to
11、 England this winter.可能今年冬天我会去英国观光。（构成一般将来时，助动词） Shall I turn on the light, Mom?妈妈，我把灯打开好吗？（用于征求对方的意见，情态动词） I shall be there.我会到那儿去的。（表“决心”，情态动词） 7.2 should用于构成将来时是助动词。should用于表示“应当”“猜测”是情态动词例如：We thought we should never see you again.我们以为再也见不到你了。（构成一般过去将来时，助动词） I should write some letters tonight.今
12、晚我得写几封信。（表“应当”，情态动词） They should be there by now.他们现在可能到了。（表“猜测”，情态动词）8.ought to的用法ought to 表示应该、理应做什么例如：You ought to clean the classroom , for it is your turn today.你应该把教室打扫了，因为今天是你值日。9.情态动词表示“推测”的用法情态动词表示“推测”时，要记住以下两种推测和形式推测：对过去发生动作或状态的推测；对现在状态的推测。两种形式：用情态动词加完成时态表示对过去发生动作或状态的推测；用情态动词加动词原型表示对现在发生动作
13、或状态的推测。具体用法如下：9.1 must have done表示过去一定做了什么，语气十分肯定例如：You must have finished your work.你一定完成了你的工作。9.2 cant have done表示过去不可能做了什么，语气也比较肯定(是上面的否定形式)例如：He cant have gone to Beijing, for I had a talk with him just now.他不可能去过北京，因为我刚和他交谈过。9.3 neednt have done表示过去没有必要做什么但已经做了。例如：You neednt have come earlier.
14、你不需要来这么早的。9.4 should have done过去该做什么但没有做。(含有责备的意思)。例如：You should have started earlier.你本应该早点开始的。9.5 shouldnt have done表示过去不该做什么但做了。(含有责备的意思)例如：You shouldnt have helped him, he could do it himself.你本不该帮助他的，他能自己做。9.6 ought to have done表示过去该做什么而没有做。(是职责和义务)例如：You ought to have helped him. (but you didn
15、t.)你应该帮助他的。9.7 can/could do sth.表示对现在情况的猜测，常用于否定句、疑问句或感叹句中。例如：This news cant be true.这消息不可能是真的。9.8 may/might do sth. 表示对现在情况的猜测，常用于肯定句中。例如：Mr.Wang may know Professor Lis telephone number.王先生也许知道李教授的电话号码。针对性练习：1) You_ all those clothes! We have a washing machine to do that sort of thingA) neednt have
16、 washedB) shouldnt have washedC) must not have washedD) can not have washed2) Johns score on the test is the highest in the class; he_ last night.A) should study B) should have studiedC) must have studiedD) must have to study3) The room is in a terrible mess; it _cleaned. (CET-4, 1996,6)A) cant have
17、 beenB) shouldnt have beenC) mustnt have been D) wouldnt have been4) Nobody knows how people first came to these islands. They _ from South America on rafts.A) must have sailedB) can sailC) might have sailedD) should have sailed5) Mary was not in her bedroom yesterday afternoon. She _ in her classro
18、om.A) should have beenB) must have beenC) must beD) should be6) Bob said he was going to join our club but he didnt. He _ his mind.A) cant have changedB) wouldnt have changedC) must have changedD) shouldnt have changed7) You_ to town to see the film yesterday. It will be on TV tonight.A) neednt goB)
19、 had better not goC) should not goD) neednt have gone8) We_ the letter yesterday, but it didnt arrive.A) must receiveB) ought to receiveC) must have receivedD) ought to have received9) With all the work on hand, he_ to the cinema last night.A) mustnt goB) shouldnt have gone C) could not goD) couldnt
20、 have gone10) Eve was late for class again. She _earlier.A) should get upB) must get upC) need to get upD) should have got up11) I am feeling sick. I_ so much chocolate.A) neednt have eaten B) couldnt have eaten C) mustnt have eaten D) shouldnt have eaten12) I didnt send out my application form last
21、 week, but I _.A) had B) would doC) should have D) might have to13) Walking alone in the deserted village, John was scared. He thought he_ Tom to go with him.A) might have askedB) should askedC) must have asked D) should have asked14) When I got to the cinema, the film had already started; I_ there
22、earlier.A) ought to getB) ought to have gotC) must have gotD) must get15) The road was muddy. It_ last night.A) must rainedB) must have rainedC) must be rainedD) 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
23、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 beB) used to beC) was used toD) use to18)- “We didnt see him at the exhibition yesterday.” - “He _it.”A) mustnt visitB) cant have v
24、isitedC) should have gone to seeD) may see 19) Mary _my letter, otherwise she would have replied before now.A) should have received B) has receivedC) Couldnt have receivedD) ought to have received20) I _ you a valuable present for your birthday, but I was short of money.A) would have liked to giveB)
25、 liked to give C) have liked to giveD) would like to give21)- “Where _ my umbrella?” - “Somebody _ it away by mistake.”A) is, must have takenB) is, must takeC) have been, must takeD) is, takes22) What _ would happen if the director knew you felt that way?A) will you supposeB) you supposeC) do you su
26、pposeD) you would suppose23) Two eyes _see more than one.A) canB) mayC) willD) should24) _ you continue in your efforts and achieve new and greater successes.A) WouldB) WillC) MayD) Should 25) We ought to help each other in our work, _?A) oughtnt weB) should weC) shouldnt weD) ought to we26) Tom _ b
27、etter than to ask Dick for help.A) shall knowB) shouldnt know C) has knownD) should have known27) You _ your tooth pulled out before it rot completely.A) had better gotB) had to get better C) had better to getD) had better get28) When we got to the cinema, the film hasnt started yet, so we _.A) need
28、nt hurryB) didnt need hurryC) neednt to hurryD) neednt have hurried29) It was really very dangerous; you _ him seriously.A) might have injuredB) could injureC) should have injuredD) must injure 30) As he had heart attack, he was told that he _ continue the work.A) neednt B) may not C) mustntD) cant3
29、1) An Englishman who _not speak Italian was once traveling in Italy.A) mustB) couldC) may D) might32) I _like to make a suggestion.A) could B) would C) must D) might33) I know things are hard with you, but you _try to get over the difficulties.A) can B) may C) must D) ought34 I cant find the recorde
30、r in the room. It _ by somebody.A) may have been taken away B) may leave C) may take away D) must have taken away35) He _the 9:20 train because he didnt leave home till 9:25.A) can reach B) could catchC) may not catch D) couldnt have caught情态动词部分练习题答案1)A 2)C 3)A 4)C 5)B 6)C 7)D 8)D 9)D 10)D 11)D 12)
31、C 13)D 14)B 15)B 16)B 17)B 18)C 19)C 20)A 21)A 22)C 23)A 24)C 25)A 26)D 27)D 28)D 29)A 30)C 31)B 32)B 33)C 34)A 35)D1. You _angry with her, for she is very young.A. need not to be B. dont need to C. need not be D. need not2. “It _Mary who is in the office.”“Im sure it _her. I saw her off at the airp
32、ort just twenty minutes ago.”A. cant be, cant be B. must be, mustnt beC. must be, cant be D. cant be, mustnt be3. You look pale. You _ill.A. can be B. must be C. should be D. has to be4. You _in your exercises in time so that you can get them back now.A. should hand B. shall hand C. Shall have hande
33、d D. should have handed5. He saw her only a minute ago, so he said that she _ not have gone to Tibet.A. must B. could C. might D. need6. “Wont you tell me more about your problems?”“I _talk about it any more.”A. would rather not to B. wouldnt rather C. would rather not D. wouldnt rather to7. “My goo
34、dness I just missed the train.”“Thats too bad. I am sure you _ it, if you had hurried.”A. could have caught B. had caught C. would catch D. could catch8. I _ tell her the truth.A. cannot help B. cannot but C. may not help D. could but9. It was so dark outside that he didnt _. A. dare to go out to fe
35、tch some water B. dare fetch some waterC. dare to go out bring some water D. to dare to fetch some water10. He left yesterday, so he _ in Beijing.A. may arrive B. may have arrived C. must arrive D. arrived11. Comrade Li _ be in Beijing because I saw him in town only a few minutes ago. A. mustnt B. c
36、ant C. may not D. isnt able to 12. You _ go now. Its getting late.A. had rather B. would rather C. had better D. would better13. Since she is angry, we _.A. had better to leave her alone B. should leave her aloneC. might as well leave her alone D. must leave her alone14. Look, what youve done! You _
37、 more careful.A. may be B. had to C. should have been D. would be15. She _ for what she has done.A. ought to praise B. ought be praised C. ought to praised D. ought to be praised16. I _ get this done immediately or it will be too late.A. can B. shall C. may D. must17. _ I ask your name, please?A. Wi
38、ll B. Shall C. May D. Must18. Why _ you always interrupt me?A. can B. will C. may D. must19. He _ blind not to see that car coming.A. can have been B. will have been C. may have been D. must have been20. He was a good swimmer so he _ swim to the river bank when the boat sank.A. could B. might C. suc
39、ceeded to D. was able to21. _ repeat the question? A. Shall I B. Will I C. Would you like that I D. Do you want that I 22. Since the ground is wet, it _ last night.A. should have rained B. has rained C. must rain D. must have rained23._open the door for you?A. Would you like me B. Do you want me C.
40、Will you mind me D. Shall I24.Professor Li, many students want to see you. _they wait here or outside?A. Do B. Will C. Shall D. Are25.I wasnt sure whether I _offer to help or not.A. should B. might C. would D. could26. “I havent felt well for a week.”“You_ see a door.”A. had ought to B. had better C
41、. should have to D. had rather27.You _read that book if you dont want to.A. havent B. cant C. mustnt D. neednt28.Although he tried he_ not make it.A. would B. should C. might D. could29.I have neither a raincoat nor an umbrella. Thats why I _wait until the rain stops.A. must B. should C. ought to D.
42、 have to30.He ought _have done so even if possible.A. not to B. to not C. not D. never31.It _be difficult to learn Tibetan.A. shall B. must C. should D. need32.He promised he _not do it any more.A. would B. should C. might D. could33.I _ have been here, but I_ not find the time.A. should, would B. s
43、hould, could C. might, could D. could, could34.I want to go the doctor, but you _with me.A. need not to go B. do not need go C. need not go D. need go not35.I dont believe him. He _ be serious.A. neednt B. cant C. maynt D. mustnt36.Would you like to see the movie tonight? I _ meet you at the gate of
44、 the Student Center.A. may B. will C. must D. ought to37.I _ not get away any sooner although I had planned to leave earlier.A. should B. would C. could D. might38. She quickened her pace in order that she _ with the others.A. may catch up B. might catch up C. could have caught up D. might have caught up39. The boy stood there without _