语法专题

1. 语法专题 情态动词的用法

2. 情态动词的基本用法特点 1） 情态动词 除 ought 和 have 外，后面只能接动词 原型。2） 情态动词没有人称，数的变化，即情态动词第 三人称单数不加-s。3） 情态动词没有非谓语形式，即没有不定式，分 词，等形式。

3. 高中阶段都学过哪些情态动词呢 1 can / could / be able to 2 may/might 3 must / have to 4 shall / should 5 will / would 6 need / dare 7 ought to

4. 1 can / could / be able to 1 Some of us can use computers now, but we couldn't last year.（能力） 2 It will be sunny in the day time ,but it can rain later on this evening（客观可能性） 3 ---Can I go now ? yes ,you can （请求和允许） 4 Could you wait a few days for the memory? （请求） 5 1 Can this news be true? 2 It can't be our headmaster.he has gone to Beijing.（表推测，主要用于否定和疑问）

5. 1. can 与be able to 有何区别？ *be able to能用于各种时态。 can / could只能表示现在或过去的能力。 *was / were able to : “设法做成某事” 相当于 managed to do sth. succeeded in doing sth.。

6. 1. A computer ______ think for itself; it must be told what to do. A. can’t B. couldn’t C. may not D. might not A 2. The fire spread through the hotel very quickly but everyone ______ get out. A. had to B. would C. could D. was able to D 3. They will ______ run this machine on their own in three months. A. can B. could C. may D. be able to D

7. 2 may / might 1 May I watch Tv after supper? Yes you may /No ,you mustn't.（请求许可) 2 It may be true ./ she may come tomorrow / He might have some fever（推测） 3 May you succeed ! May you have many more days as happy as this one（祝愿） may/ might as well还是 -----好 we may as well stay where we are

8. 5. — Could I borrow your dictionary? — Yes, of course you _______. A. might B. will C. can D. should 6. — Might I watch TV after supper? — Yes, you ________. A. may B. must C. might D. can C A

9. 3 must 语 have to 的 用法 1 You must come to school on time . You mustn't waste any more time（必须,禁止） 2 Must I come back before ten ? Yes ,you must. No, you needn't./ don't have to 3 It must be our headteacher. You must be hungry after a long walk.（推测) 4 I really must go now. I have to go now,because my mother is in hospital.( 不得不）

10. 3、表推测语气的反意疑问句的构成 isn’t He must be reading, ____ he? You must do it yourself, ____ you? He must have gone over the article, ______he? It must have rained last night, _____ it? don’t hasn’t didn’t 另外must 还有偏偏一定要的意思 why must you play the piano while others are sleeping.

11. 7. You ______ return the book now. You can keep it till next week if you like. A. can’t B. mustn’t C. needn’t D. may not 8. Johnny, you ______ play with the knife, you ______ hurt yourself. A. won’t ; can’t B. mustn’t ; may C. shouldn’t ; must D. can’t ; shouldn’t C B

12. 9. --Will you stay for lunch? --Sorry, _____. My brother is coming to see me. A. I mustn’t B. I can’t C. I needn’t D. I won’t 10. --May I pick a flower in the garden? -- ________. A. No, you needn’t B. Not, please. C. No, you mustn’t D. No, you won’t B C

13. 4 shall 与 should 1用于一，三人称疑问句表示征求对方的意见 和 向对方请示 Shall the driver wait ?What shall we do next ? 2 用于 二 三人称陈述句表示命令警告，允诺， 威胁以及法律条文规定 You shall go with me / He shall be punished You shall have the book when I finish it All the children shall go to school at the age of seven.

14. 3表示劝告和建议 You should study hard. 4 表推测 They should have arrived by two o'clock 5用于if 条件句表示万一 Ask Tom to ring me up if you should see him. Shoud I be free tomorrow ,I will come. 6 表竟然 I don't know why you should be so rude to your mother

15. Tom’s father promised, “You ___have a new computer if you pass the coming examination,” A.can B.should C.shall D.may C

16. ------When can I come for the photos ? I need them tomorrow afternoon. -----They _____be ready by 12 : 00 . ( A. can B. should C. might D. need B

17. C • You ought to have helped him with his English, ____you ? • A. won’t you • B. ought not you • C. shouldn’t you • D. wouldn’t you

18. 5 will 与 would 的用法 1 表示意志和意愿 I will never do it again. They said that they would help us. 2 表请求，建议 Will you please take a message for me? Would you please pass him the book? 3 表功能 This machine won't work. 4 表示习惯性动作与used to有何区别 Fish will die without water. Every evening ,he would sit by the window.

19. 6 need 语 dare的用法 既可做实意动词又可做情态动词。做情态动词用于 否定和疑问句而做实意动词可用于肯定，否定疑问 How dare you say such a thing? How dare you to say such a thing? He daren’t to speak English before such a crowd, did he? He daren’t speak English before such a crowd, dare he?

20. C She _____out alone at night. ( ) A.dare not to go B. dares not go C. doesn’t dare to go D. doesn’t dares go

21. 7 ought to 的 用法 1 表应该与 should 的 区别 You ought to take care of him. You are his father .You ought to get him to receive good education 2 表推测 He ought to be home by now. He must be home by now.

22. 一 情态动词+ 完成时表对过去的推测 1 must have done（仅用于肯定句) 2 can't /couldn't have done(用于否定疑问句） 3 may have done （肯定，否定均可) 4 might have done（肯定，否定均可) 二 表虚拟 1 should / could /would /might have done 三 needn't have done would rather have done had better have done

23. A Jenny ____with him at that time, for I was having dinner with her in my home. ( ) A.can’t have been B. mustn’t have been C. must be D. may be

24. They are disappointed at the English party. They say that it ___better organized. ( ) A.had been B. had to be C. must have been D. could have been D

25. ---- Did you walked home by yourself last night ? ---- Yes, I did. But I think I _____. ( ) A. needn’t B. shouldn’t C. may not have D. needn’t have D

26. C • 8. We______last night, but we went to the concert instead. • A. must have studied B. might study • C. should have studied D. would study • 9. There was plenty of time. She_____. • A. mustn’t have hurried B. couldn’t have hurried • C. mustn’t hurry D. needn’t have hurried • 10. Yesterday, Jane walked away from the discussion. Otherwise. She____something she would regret later. • A. had said B. said • C. might say D. might have said. D D

27. D • 11. ----Did you scold him for his mistake? • ----Yes, but______it. • A. I’d rather not do • B. I’d better not do • C. I’d better not have done • D. I’d rather have not done

28. Homework Finish off the exercises. Read the passage about the modal verbs.