中考英语专项6.情态动词讲解及习题(共10页)

1、精选优质文档-倾情为你奉上初中英语情态动词用法详解【情态动词知识梳理】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。考点一：can，may，must等情态动词在陈述句中的用法：1. can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，此时may和must均不可代替它。如：She can swim fast, but I cant . （2）.表示许可，常在口语中。如：You can use my dictionary. （3）.表示推测，意为“可能”，

2、常用于否定句和疑问句中，此时cant译为“不可能”。如：Can the news be true?No, it cant be our teacher. He is on a visit to the Great Wall.2. could的用法：（1）.can的过去式，意为“能、会”，表示过去的能力。如：He could write poems when he was 10. （2）. could在疑问句中，表示委婉的语气，此时could没有过去式的意思。如:Could you do me a favour?Could I use your pen?Yes, you can.（注意回答）3.

3、 may的用法：（1）.表示请求、许可，比can正式，如：May I borrow your bike? You may go home now. (2) .表示推测，谈论可能性，意为“可能，或许”，一般用于肯定句中。如：It may rain tomorrow . She may be at home. (3) .may的过去式为might，表示推测时。可能性低于may。如：He is away from school. He might be sick. (4) . 表示希望、祈求、祝愿，常可译为“祝愿”。通常是用may +主+V例如：May you have a good time. M

4、ay you be happy! May you succeed！4. must的用法：(1).must表示主观看法，意为“必须、一定”。如：You must stay here until I come back. Must I hand in my homework right now? (2)其否定形式mustnt表示“一定不要” “千万别” “禁止,不许”.如：You mustnt play with fire. You mustnt be late.（3）对must引导的疑问句，肯定回答为must，否定回答为neednt 或dont have to .如：Must I finish

5、my homework?No, you neednt. (4)must表示有把握的推测，用于肯定句。如: The light is on, so he must be at home now.注意其反意问句的构成形式：当must表示肯定的判断、推测时，其反意疑问句要用实际问句的助动词来构成。如：She must have seen the film before，hasntshe?(注意反意疑问句的后半部分)You must have met uncle Wang in the shop yesterday，didnt you? (注意反意疑问句的后半部分)5. need的用法：（1）.nee

6、d表示需要、必须，主要用于否定句和疑问句中，其否定形式为neednt，意为“没有必要，不必”。用need提问时，肯定回答为must，否定回答为neednt或dont have to。如：Need I stay here any longer?Yes, you must .No. you neednt /dont have to.(2).need还可以作实义动词，此时有人称、数和时态的变化，如果是人作主语后边多接动词不定式。如：I need to do it right now. 如果是物作主语，一般用need doing与need to be done这种情况下应注意两点：.主动形式的动名词d

7、oing具有被动的含义；.该动名词可以改为其动词不定式的被动形式而句子的意义不变。例如：. The door needs painting. = The door needs to be painted. 6. dare的用法：dare意为“敢、敢于”,用法近似于need，有两种词性：（1）dare作为情态动词，多用于否定句、疑问句或条件句中，无第三人称单数形式，只有一般现在时和一般过去时。如：Dare he tell them what he knows? I darent ask her will you do it for me?（2）dare作为实义动词，此时有人称、数及时态的变化。如

8、：He doesnt dare to break his promise.注意：口语中，dare的各种形式常与不带to的不定式连用。如：Do you dare tell her what I said?7. shall的用法：shall表示征求对方意见（多用于第一、三人称），如：Shall we go out for a walk?8. should的用法：（1）.should意为“应该”，可表示劝告、建议、义务、责任等。如：We should protect the environment.（2）Should have done表示对过去动作的责备、批评。如：You should have

9、finished your homework.9. will的用法：will表示意愿、意志、打算，可用于多种人称。如：I will help you if Im free this afternoon.10. had better的用法：had better意为“最好”，没有人称的变化，后面接不带to的不定式，其否定形式为：had better not。如：We had better go now.考点二：含有情态动词的疑问句的回答:1.对may引出的问句，可以有下列回答方式：Yes,you may. Yes, of course.Yes, certainly.Sure .No, you mu

10、stnt. No, you cant.2.对must引出的疑问句，回答方式为：Yes, must. No, neednt/ dont have to.3.could在疑问句中，表示委婉的语气，此时could没有过去式的意思。如:Could you do me a favour?Could I use your pen?Yes, you can.（注意回答）4. shall引出的疑问句用于第一人称，表示征求对方意见或客气的请求。其回答方式有以下几种：Yes, please.All right.No, thank you.5.would you的回答方式有以下几种：Yes, I will. (No

11、, I wont.)Sure . (Im sorry , I cant.)All right/ OK/ With pleasure.Certainly. (No, thank you .)Yes, please.考点三:不同情态动词的否定意义也不同：1.（1）.cant可译为“不会”，如：I cant play basketball.（2）当句子表推测时，用cant表达不可能，如：He cant be ill. He is playing chess with Tom.（3）cant还可用来回答“ May I ? ”这样的问句。如：May I come in ? No, you mustnt.

12、 / cant.（4）cant还可用于固定习语中。cant help doing禁不住，情不自禁cant wait to do something迫不及待地要做2. may的否定式为may not，译成“可能不”，如：He may not be at home.3.（1）mustnt表示不许，不可。如：He mustnt leave his room.(2) mustnt也可用于以may表示要求时的否定回答中。如：May I stand here?No, you mustnt (cant).4.（1）neednt意为“不必”。如：You neednt meet him unless youd

13、like to.（2）neednt + have+动词的过去分词，表不需要完成但已完成的动作，暗含时间或精力上的浪费。如：You neednt have bought it.你没必要买它（但你却买了）。5. shouldnt表示不应该。如：You shouldnt feel so unhappy over such little things.考点四:情态动词的被动语态含有情态动词的被动语态的结构为：情态动词+ be + done (动词的过去分词)。做题时要兼顾情态动词和被动语态这两个方面。考点五:情态动词表示推测的用法:一、“情态动词+动词原形”表示对现在的推测。1、can表示推测时一般用

14、于否定句或疑问句。如：That man cant be her husbandshe is still single.2、must表示肯定的推测，一般用于肯定句中。如：He must be in his office now.3、might表示推测时不一定是may的过去时，只是表示其可能性较小。如：The man may be the headmaster.4、Could表示推测时，语气can比要弱，说话者留有余地。如：Could it be an animal?It could not be，because it is not moving.5、Should表示推测的可能性比较大，仅比mus

15、t的可能性小一点。如：It is already 10 oclock now they should be there.二、情态动词表示对过去可能发生的动作或存在过的动作的推测性用法。1、“must +have done/been-”表示“过去一定发生过某事或存在过某种状态”，不用于“musnt+have-”形式。如：She must have seen the film before，hasntshe?(注意反意疑问句的后半部分)2、“should +have done /been-”表示“本应当做某事，而实际上并没有做”；“shouldnt+完成式”表示“本来不应当做，而实际上却做了”。以

16、上结构常带有说话者的责备的感情色彩。如：You should have finished your homework earlier (but in fact you did not finish it on time).3、“neednt+完成式”表示“本来没有必要做某事，而实际上却做了”。如：There was plenty of time. She neednt have hurried .4、“cant /couldnt+have done /been-”表示“过去不可能发生了某事或存在过某种状态”。如：I saw him just now. He cant have gone to

17、Japan.5、“could+have done/been-”表示“过去本来能够，可以做某事或成为某种状态，而实际上没有”，说话者有些遗憾。6、“may/might+完成式”表示“过去可能，本来可以于某事而实际上没有干”，might的可能性较小，语气较弱。如：He may have finished reading the book. 【情态动词易混点归纳】易混点一: can和be able to:两者表示能力时用法相同，但can只有原形“can”和过去式“could”两种形式，在其他时态中要用be able to来表示。另外be able to常常指经过努力，花费了时间和劳力之后才能做到某事

18、。易混点二:can和may1. can和may均可用来征求意见或许可，意为“可以”，一般可互换使用。如：Can/ May I help you ? 我能帮助你吗？2. can和may表示可能性时的区别：1)在肯定句中用might，may，must，不用can2)在疑问句中表示推测用can，不用might，may，must3)在否定句中用cant（不可能），不用may，must。如：She may be in the classroom .她可能在教室里。Where can they be now?他们现在可能在哪儿？That cant be true.那不可能是真的。易混点三: may be和

19、maybe 用法区别 常用位置may be may为情态动词，be为动词原形 句中，作谓语maybe 副词，大概、也许，相当于perhaps 句首，作状语例如：He may be wrong , but Im not sure.也许他错了，但我也不确定。易混点四：cant和mustnt1. cant根据其基本用法可译为：（1）不会。如：I cant speak English .我不会说英语。（2）不能。如：We cant do it now because its too dark.天太黑了，我们现在干不了。（3）否定句中表示推测。“不可能”，如：The man cant be our te

20、acher because he is much younger than our teacher.。2. mustnt意为“禁止、不许”，用来表达命令，表示强烈的语气。如：You mustnt play football in the street. Its too dangerous.易混点五：must和have to1.must侧重于个人意志和主观上的必要。have to侧重于客观上的必要，可用于现在时、过去时和将来时。易混点六: used to do / be used to doing / be used to do/ be used for doing sthused to do表

21、示过去常常发生的动作，强调过去，只用于过去；而be used to doing意为“习惯做”；be used to do意为“被使用去做,”为被动语态形式。be used for doing sth“用作”练习题一1. -Mum， may I watch TV now？-Sure， but you _ help me with my English.A. can B. may C. must D. could2. -_ I download the article again？-No，you needn't.A. Shall B. Will C. Must D. Can3. -Can

22、you go skating with us this afternoon？-Sorry， I can't. I _ take care of my little sister at home.A. can B. may C. would D. have to4. -Must I hand in my exercise book today？-No， you _.A. can't B. needn't C. mustn't D. won't5. -May I have a word with you？-No， you _. I'm busy to

23、day.A. needn't B. wouldn't C. don't have toD. can't6. -_I have your English name， please？-Yes， Helen. H-E-L-E-N.A. Must B. May C. Will D. Need7. -Who is the boy over there？ Is it John？-No， it _ be him. John is much taller.A. mustn't B. may not C. can't D. needn't8. -Can y

24、ou play Frisbee， Jay？-Yes， I _. It's easy.A. must B. can C. need D. may9.-You must come back every month. -Yes， I _.A. will B. must C. should D. can10. She _ know the answer， but I'm not sure.A. maybe B. may be C. may D. must11. - Must we clean the room right now？- No， you. You clean it afte

25、r lunch.A. needn't；may B. needn't;mustC. Mustn't； can D. mustn't；may12. John_ come to see us tonight， but he isn't very sure yet.A. may B. can C. has to D. must13. Children _ play with fire.A. mustn't B. can't C. shouldn't D. needn't14. -_ I come in， Mr Green？-Yes

26、,come in， please.A. Must B. Need C. Will D. May15. -Must I finish the work today？-No， you _. You _ finish it tomorrow.A. mustn't； may B. can't； canC. needn't； may D. needn't； must练习题二1. _ I go out to play now，Mum? No，you_ AMay，shouldnt BCan，neednt CMust，cant DMaymustnt 2. Help m

27、e with this case_ you? Adont Bwill Cdo Dshall 3. They started early that morning in order that they_ there before noon Amight get Bmay get Cwould get Dgot 4. A teacher do every exercise，but a pupil_ Aneednt，must Bmay not，must Cneednt, neednt Dcant, must 5. If you _ do as I tell you，you_ go

28、 to the party Acan，shant Bwill, wont Cwont，shall D wont, shant Awill Bwould Cdo Dcan 7. Dont believe himHis story _ be true Amustnt Bneednt Cshouldnt Dmay not8. -She must have gone back to the valley -No, she _ . The entrance to it was nowhere to be found Amustnt Bneedn't Ccouldnt Dhad

29、nt 9. You need not do it at once,_? Aneednt you Bmustnt you Cdont you Dneed you  10. He must be in the classroom_ he? Amustnt Bcant Cisnt DCan11. Lets go to the libraryshall we? _ ANo，I cant BYesI will CYes，thank you DNo，Wed better not 12. You ought to have called him yesterday Yes, I

30、 know I_ Aought to Bought to have Cought to have done Dought to have called13. -Why did you keep it a secret from me? -I _ about it Ashould be told Bought to have been told Cshould have told Dought to be told 14. The work _ be finished in such a short time Awasnt able to Bcouldnt Cought Dcould&

31、#160;15. He looks very tiredHe _ to bed too late last night Amust go Bmust have gone Ccould go Ddidnt go16. The door _ lock Acant Bmay not Cwont Dmustnt17. As a soldier，you _ do as the head tells you Awill Bshall Cmay Dought 18. How _ you be so careless? Acan Bwill Ccould Dmay 19. I talked for

32、a long time，and in the end I_ make her believe me Acould Bcan Cmust Dwas able to20. Did you scold him for carelessness ? Yes，but _ it AId rather not do BId rather not have done CI shouldnt do DId better not do 21. He neednt come to attend the meeting_ ? Adidnt he Bdoesnt he Cneed he Dmust

33、he22. Fish _ die without water Awill Bshould Cshall Dmust 23. Wed better hurryOur teacher _ us Await for Bmust wait for Cmust be waiting for Dhas waited for 24. I saw him leave the room an hour agoHe _ at this time Amustnt be working Bcant be working  Ccant work Dmay not being working

34、25. _ basketball every day? ADid you used to playing BDid you use to play CUse you to play DUsed you play26. Why_ you keep on troubling me with such questions while I am busy ? Acould Bcan Cmust Dwill 27. -You were driving at 100km an hour, sir -But officer，I_ ，my car cant go more than 90. Amay

35、 not have been Bcouldnt have been Cwould have been Dneednt have been28. You _ call him if you want to，but you_ ，for hell surely come here soon Acan，neednt Bmay, mustnt Chave to，neednt Dcan, doesnt need29. At last he _ finish the work ahead of time Acould Bwas able to Ccould have done Dwould have bee

36、n able to 30. There must be some enemy soldiers in the forest. _ any behind the church? AMust there be BShould there be CMay there be DCan there be31. The shy girl_ dance before so many strangers， _she? Adarent，does Bdarent，dare Cdoesnt，dare Ddare notDares 32. “When _ he leave the hospital

37、?” I asked the doctor Awill Bshall Ccan Dmay 33. -They havent finished the work up to now -Well，they_. Ashould have Bshould Cought to Dought have34. The money was soon spent，so she _ go hungry Amust Bhad to Cmight DShould35. Jack studied hard and _ pass the examination Acould able to Bwould Cwa

38、s able to Dought 36. You dont look well，you _ have a fever Amight Bcan Cshall Dshould37. You are running a fever，you _ to see the doctor Aneed go Bmust have gone Cshould go Dcan go 38. I _ take the jobNo one _ stop me Awill，can Bcan，must Cmust，can Dwill, must 39. There used to be a hi

39、gh tower here，_ ? Awas there Bwasnt there Cused there Dusednt there40. Whenever the teacher was not there, the children _ make a lot of noise Awill Bwould Cwere to Dwere going to41. He must be shy, _ he? A. A   must Bmustnt Cis DisntB 42. I must do it, _ I?  Ado Bdont Cmust Dmust

40、nt43. You did not go to the party yesterday, or I _ you. Awould see Bcould meet Cmight have seen Dmight see44. -How do you like the food here? -Oh，excellent! We _ a better hotel Acant find Bwont find Cmustnt have found Dcouldnt have found 45. -We were waiting for you this time yesterday -Sorry，

41、I _ you to tell you that I couldnt come. Amust have called Bwould have been calling Ccould have been calling Dshould have called46. -Would you mind returning the book tomorrow? -_ AOk，I will BSure, I wouldnt CYes，I wouldnt DWhy, I wouldnt47. See whos there! _ it be Mary? AMay BMust CCan DWill 48. My little son _ out a1one at night Adares not go Bdares not to go Cdare not to g