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1、精选优质文档-倾情为你奉上情态动词（讲义）一、can, could, may, might 表示请求许可1. 区别Can I take the book away? Could I take the book away? May I take the book away? Might I take the book away?语气的委婉程度从高到低为 can, could, may, might。2. can, could, may, might 表示请求许可时的回答。Can you give me another chance?Yes, I can.No, I cant.Could I lo
2、ok at your pictures?Yes, of course you ./I am sorry you .用 could 提问，表示“能吗？”，若表示同意用 can，不同意用 cant，注意不用 could 来回答。May I speak to you for a moment in private, please?May 表示请求许可时，常常与第一人称 I 连用，构成“May I?” 句式，表示“我可以吗？”肯定回答用 Yes, you may. / Yes, please. / Yes, of course.否定回答用 No, you cant. / No, you mustnt.
3、 ()May I smoke here? , you . It can be dangerous.A. Yes; canB. No; cant C. Yes; may D. No; neednt Might I come in?Might I borrow some money?might 用于礼貌的询问是否能做某事，常出现在口语中，用法稍显过时。肯定回答通常用 may，否定回答可以用 cant 或者 mustnt。练习：()Can I get you a drink? . I am not thirsty.A. Thats very nice of youB. No, you dont ha
4、ve toC. Yes, pleaseD. With pleasure()May I leave the classroom now?1No, you . You shouldnt leave until the bell rings.A. may notB. cantC. needntD. couldnt专心-专注-专业()you pass me a pen? Id like to write down the telephone number.A. NeedB. CouldC. MustD. Should ()Could I use your eraser for a while?Yes,
5、 of course you .A. couldB. willC. canD. should二、情态动词和短语情态动词1. 情态动词needThe little girl needs to get some sleep.I needed two more days to finish the work. Do you need to have some coffee?need 作实义动词，有人称，时态的变化。接动词时，用动词不定式。Need I come here before eight tomorrow morning?No, you neednt.need 作情态动词时，常用于否定句和疑
6、问句中。判断下列句子中的 need 属于实义动词还是情态动词Tom needs to have a rest after a days working. Need I pay the dishes now? He didnt need to go the hospital. He neednt have gone to hospitalhe only had a cold. dare v. 敢 于I would never dare to steal things from stores. Do you dare to tell her what I said?I didnt dare to
7、look at him.I darent tell my mother the truth.dare 可以做实义动词，后面接动词不定式（口语中 to 可以省略） 也可做情态动词，常用于否定句和疑问句。shallWe shall be away next week.I shall be in Henan next Friday.I/we shall，用于表示未来要做的事。Shall I open the window?Shall we meet at six, OK? What shall I make for dinner?shall I/we，好吗？要不要？用于提建议或要求他人做请补充完整下
8、面的对话A: How can we go there? B: We can go there by bus.A: How long will it take us to get there? B: About half an hour.A: ?B: Lets meet at the bus stop at 7 oclock.2. 短语情态动词have to“不得不”，使用时有人称和时态的变化。 My brother has to eat an egg every day.You dont have to be here tomorrow.had better“最好”You had better
9、 stay at home tomorrow, for it will rain heavily. Tina had better not put off the plan because it is very important. 否定形式为 had better notwould rather “宁愿”I would rather go there with you.我宁愿不去电影院。I would rather not go to the cinema. 否 定 形 式 为 would rather not ought to1）表义务，意为应该（因责任、义务等该做），口气比 should
10、稍重。You are his father. You ought to take care of him. You ought not to smoke so much.2）表推测，暗含很大的可能，语气较弱，可翻译为“应该吧”。Han Mei ought to know his telephone number.Theres a fine sunset; it ought to be a fine day tomorrow.三、情态动词加完成时1. 情态动词表示对现在情况的推测Its just five oclock. Mary must be staying on bed now.3肯定推测
11、That cant be Tom. He went to Beijing yesterday.否定推测He may/might be in China now.可能性推测2. 情态动词表示对过去情况的推测must have doneHe must have arrived in Henan at that time.Lucy must have finished the book before she returned it.昨晚一定有人进来这个房间了。Somebody in the room last night.must have done 对过去的肯定推测，翻译为“一定了”。cant h
12、ave doneMiss Li cant have gone to Shanghai. I met her yesterday.He cant have done that because he stayed with me at that time.cant have done，对过去的否定推测，翻译为“不可能做了”。Jimmy 不可能打扫了房子，因为他昨天就不在家。Jimmy cant have cleaned up the house because he was not at home yesterday.3. 情态动词表示对过去情况的虚拟should have doneTom, yo
13、u are too lazy. The work should have been finished yesterda. You should have told me about it earlier.My father should have got home at seven but his car broke off on the way.should have done 翻译为“本应该了（但实际没有）”（也可用 ought to have done）我本就应该知道他是在骗我的。I that he was lying to me.neednt have doneYou neednt h
14、ave done it by yourself. You could ask others for help. My mom neednt have told me these words. I knew how to do it.I neednt have bought so much foodonly five people came. neednt have done 翻译为“本不应该做（实际做了）”。could have doneYou could have got higher scores.4I could have been there yesterday, but I met
15、Tom on the way.could have done “本能够”（实际未能做某事）练习：() The ground is wet. It have rained last night.A. cantB. needntC. shouldD. must() Mr. Smith have gone to Beijing, for I saw him in the library just now.A. mustB. needntC. cantD. should() Theyhave finished the work yesterday, but it was raining hard.A.
16、 mustB. couldC. shouldD. neednt() I have bought so much wineonly five people came.A. couldB. mustC. needntD. should四、情态动词考点总结1. 常考点：通过语境分析说话人语气，选用最合适的情态动词()Look out! The knife is very sharp. You cut your finger.A. needB. mustC. shouldD. may ()In order to speak English better, we _ be afraid of losin
17、gface. Remember, practice makes perfect.A. shouldB. shouldntC. have toD. must ()You stop when the traffic light turns red.A. canB. had betterC. needD. must ()Theres enough time for you to go to the airport. You hurry now.A. shouldB. needntC. mustD. cant2. 常考点：情态动词与一般现在时连用，表示对现在的推测。()Is Mr. Hu in the
18、 reading room?No, he be there. He has gone to Tianjin.A. mustntB. needntC. wontD. cant ()This book Lucys. look! Her name is on the bookcover.A. must beB. may beC. cant beD. mustnt be()This pair of shoes belong to Jack. He likes this kind very much.5It be his. Its too large for him.A. can; cantB. may
19、; needntC. must; mustntD. must; cant3. 常考点：mustnt 与 must 问句的回答()According to the traffic laws, people _ drive after drinking wine or beer.A. wouldntB. couldntC. needntD. mustnt ()Must we leave now?No, we . We still have two more hours.A. cantB. mustntC. needntD. shouldnt ()Miss Li, must we hand in o
20、ur homework right now?No, you . You can hand in it tomorrow.A. dontB. mustntC. needntD. may not ()Tom, you _ play with the knife. Youhurtyourself.A. wont; cantB. mustnt; mayC. shouldnt; mustD. cant; should4. 常考点：can, could, may, might 表请求许可时的回答。()May I leave now?No, you . You should wait here until
21、lunchtime.A. cantB. needntC. couldntD. wont ()Could I have another candy, mom?No, you . Its bad for your teeth.A. couldntB. needntC. cantD. shouldntExercises一、单项选择()1. Can I borrow your ruler, please?Yes, you _ . But you must return it before lunchtime.A. haveB. canC. mustD. used to()2.you wait a fe
22、w more minutes? Itll be your turn soon.A. MustB. ShouldC. CouldD. Might ()3. I try on these shoes in the window? . They are just on show.6A. Could; Yes, you canB. Can; Sorry, you couldntC. Could; Sorry, you cantD. Can; Yes, you could()4. Amy, I hear youve got many foreign coins. I have a look?Of cou
23、rse, Ill fetch them for you.A. MayB. MustC. ShouldD. Need ()5. May I smoke here?Im sorry you . It is dangerous to smoke at gas station.A. needntB. couldnt C. shouldntD. mustnt() 6. Lisa is a little poor at Chinese. I think she needs it every day.A. practice to speakB. to practice speakingC. practice
24、 speakingD. to practice to speak ()7. Shall we take a taxi?No, we . Its not far from here.A. cantB. mustntC. shouldntD. neednt()8. What do you want to eat for lunch? I will prepare earlier today.Honey, you . Lets go out to have something different.A. mustntB. cantC. shouldntD. dont have to() 9. Its
25、rather hot in the room. Youd better the windows or the door.A. closeB. not to closeC. dont closeD. not close()10. The students ought to wear school uniforms when theyre at school. 划线部分可以替换为： A. mustB. would like to C. shouldD. love to()11. Harryhave won the speech contesteasily yesterday, but he gav
26、e up.A. couldB. mightC. shouldD. must()12. The weather was fine yesterday. I _my umbrella with me .A. should have takenC. neednt have takenD. mustnt have taken ()13. I didnt hear the phone. I asleep.A. must beB. must have beenC. should beD. should have been ()14. He is not poor. You have lent him th
27、e money.A. cantB. needntC. couldntD. mustnt()15. Ihere in time, but I met an old friend of mine. I stopped and talked with him for some time.A. shouldnt have comeB. must have comeC. neednt have comeD. could have come()16. I didnt see her in the meeting room this morning. She at the meeting.A. mustnt
28、 have spokenB. mightnt have spokenC. cant have spokenD. shouldnt have spoken ()17. Can you go swimming with us this afternoon?Sorry, I cant. Itake care of my little sister at home.A. canB. mayC. wouldD. have to ()18. What will the weather be like tomorrow?It be rainy, cloudy or sunny. Who knows?A. m
29、ustB. mightC. shallD. should ()19. How was the party last night, Mark?It was great. You come.A. mustB. canC. shouldD. may ()20. Will you stay for some more days?Sorry, I . My mother called to ask me to go back at once.A. mustntB. may notC. cantD. wouldnt ()21. Good morning. Ive got an appointment wi
30、th Mr. Kingin his office.Morning. You be Mr. Jones. This way, please.A. willB. mustC. canD. might () 22. This dictionary Toms. There is Anns name on it.A. might be B. may beC. must beD. cant be()23. Look at the sign!8Oh, I see. We speak loudly in the library.A. canB. mustC. mustntD. neednt() 24. Mus
31、t I return the book this week?No, you . You can it for 20 days.A. mustnt; keepB. neednt; borrowC. neednt; keepD. mustnt; borrow ()25. I come back before five oclock?No, you . But yoube back later than seven oclock.A. Need; must; mustntB. May; mustnt; cantC. Can; cant; cantD. Must; neednt; cant【参考答案】一、2. cancantB练习：BBBC 二、1. 实义动词情态动词实义动词情态动词When and where shall we meet?三、2. must have come3. should have known练习：DCBC 四、1. DBDB2. DAD3. DCCB4. ACExercises一、单项选择15：BCCAD610：DDDDC1115：ACBBD1620：CDBCC2125：BDCCD