中考英语专项6.情态动词讲解及习题练习

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. - Where is Mary? - She _ in the library. A. should be B. must be C. can be D. must have been2. His room is dark. He must _ to bed. A. go B. be going C. have gone D. have been gone3. “Will yo

22、ur father stay home tonight?” “Im not sure, He _to work.” A. must go B. can go C. may be gone D. may be going4. “Where is Tom?” “He isnt here I think he _ have gone home.” A. may B. must C. might D. A or B or C5. “I think Helen is at home.” “ No, she _ be at home, for she phoned me from the airport

23、just five minutes ago.” A. mustnt B. neednt C. cant D. darent6. Hes late. What _ have happened to him? A. can B. may C. should D, must7. “ _ he be watching TV now?” Yes, he _ be watching TV now.” No, he _ be watching TV now.” A. Must; can; mustnt B. Can; must; cant C. Must; must; cant D. Can; can; m

24、ustnt8. “_. He have left yesterday?” Yes, he _ yesterday.” No, he _ yesterday.” A. Must; must have left; cant have left B. Can; can have left; cant have left C. Can; must have left; cant have left D. May; must have left; shouldnt have left9. You must be a writer, _ you? A. mustnt B. are C. must D. a

25、rent10. You must have seen her yesterday, _ you? A. mustnt B. havent C. didnt D. dont11. You must have seen her, _ you? A. havent B. didnt C. dont D. A or B12. There was plenty of time. She _ worried or hurried. A. mustnt have B. shouldnt have C. must be D. neednt have13. I got up early, but I _ so

26、because I had no work to do that morning. A. mustnt have done B. didnt need to do C. neednt have done D. cant have done14. I _ up early this morning. So I stayed in bed till 9 a. m. A. neednt have got B. didnt need to get C. shouldnt have got D. cant have got15. The flower is dead. I _ it more water

27、. A. will give B. would have given C. must give D. should have given16. He _ have come here yesterday, but he didnt. A. could B. should C. ought to D. A or B or C17. “Must he do it?” “No, he _.” A. mustnt B. neednt C. doesnt have to D. B or C18. “Need you go now?” “Yes, I _.” “No, I _.” A. need; nee

28、dnt B. must; neednt C. may; mustnt D. can; neednt19. “May I borrow your bike?” “No, you _.” A. mustnt B. may not C. had better not D. cant20. “Can I do it?” “No, you _.”or “No, please _.” A. cant; doesnt B. cant; dont C. cant; cant D. cant; you dont21. I missed the last bus, so I _ go home on foot.

29、A. must B. have to C. may D. had to22. We _ hurry if we want to arrive in time. A. must B. need C. may D. have to23. He ought to have won the first prize, _ he? A. oughtnt B. shouldnt C. mustnt D. oughtnt to24. He _ get up early when he lived in the countryside. A. would B. used to C. mustnt D. cant

30、25. My brother _ be very naughty, and my sister _ like reading. A. used to; would B. would; used to C. used to; used to D. would; would26. _ you please pass on a message to him? A. Do B. Shall C. May D. Will27. _ we set off now? A. Shall B. Will C. Would D. ought28. “_ he open the window?” Yes, plea

31、se.” A. Does B. will C. Shall D. Would29. Ive told him many times, but he _ listen to my advice. A. shall not B. wont C. will not D. wouldnt30. “Will you lend me a hand?” “Yes, I _.” A. will B. shall C. can D. may31. Everyone _ do his best for the modernization of China. A. will you B. dont we C. sh

32、all we D. do you32. Lets clean our room, _? A. will you B. dont we C. shall we D. do you33. Let us watch TV, _? A. will you B. dont we C. shall we D. do you34. Close the door after you, _ you? A. dont B. do C. shall D. will35. Every time he meets me, he _ to me. A. smiled B. would smile C. will smil

33、e D. is smiling36. “_ you like to see a film?” “Yes, Id like _.” A will; to B. Would; to see C. Would; to D. Will; to see37. He asked me for his book many times. Please tell him he _ have it tomorrow. A. must B. may C. shall D. is38. - Must I finish all the exercises today? - No, you _, but you _fin

34、ish them before Friday. A. mustnt; need B. dont have to; must C. neednt to; need D. shouldnt; ought39. Night has fallen. We have to go home, _ we? A. dont B. havent C. mustnt D. shouldnt40. The cat _ hibernate is winter. A. doesnt need to B. neednt C. mustnt D. shouldnt41. Your composition _ rewriti

35、ng, _ it? A. need; neednt B. needs; doesnt C. needs; does D. need; doesnt42. Neither of them _ the snake. A. dares catch B. dares to catch C. dare catch D. dare catching43. He _ any help. A. neednt B. doesnt need C. need D. do need44. Im afraid you must have met with many difficulties in the work, _

36、? A. didnt you B. arent you C. mustnt you D. neednt you45. I wish to shake hands with you, _? A. will you B. shall we C. can you D. may I46. Susan, you are so lazy. This job _ hours before. A. should finish B. could be finished C. must have been finished D. should have been finished47. _ if it were spring all