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情态动词的用法 1 、 Could I borrow your book? Yes. Of course you can. 2. Would you like to do it for me ? Yes. I would. 一、情态动词注意事项.

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Presentation on theme: "情态动词的用法 1 、 Could I borrow your book? Yes. Of course you can. 2. Would you like to do it for me ? Yes. I would. 一、情态动词注意事项."— Presentation transcript:

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2 情态动词的用法

3 1 、 Could I borrow your book? Yes. Of course you can. 2. Would you like to do it for me ? Yes. I would. 一、情态动词注意事项

4 (1) 对现在或将来情况推测: must + 动词原形。 must 只能用于肯定。否定和疑问分别用 can’t 和 can 。 He must tell a lie. Can he tell a lie ? He can’t tell a lie. *Must-should/ought to –may-might/could+do 可能性依次减弱 2 、推测语气

5 (2) 对过去情况推测: must (may, might)+ 完成时。 You must have met him before. must—may—might 可能性依次减弱 must 只能用于肯定句,译成 “ 一定 ” 。否定 和疑问分别用 can’t / couldn’t 和 can / could 。 Could /Can it have happened last night ? It couldn’t/can’t have happened last night.

6 He must be reading, isn’t he? You must do it yourself, don’t you? He must have gone over the article, hasn’t he? It must have rained last night, didn’t it? 3 、表猜测语气的反意疑问句的构成

7 would need used to do dare mustn’t don’t have to=needn’t may/might do/have done 不妨 …; 还是 … 为好 4 、 be able to must can have to

8 1 )用于第一人称表将来。 I shall go to work after I have finished school. 2 )用于一、三人称疑问句、表征求对 方意见或向对方请求。 Shall he come in? — Come in, please. 3 )用于二、三人称,表示保证、承诺、 威胁、警告。 You shall be punished if you insist on doing it this way. 5 、 Shall

9 1 )预测、可能。 They should be here by now. 2 )说话人的感情。如惊奇、愤怒、 失望等、 “ 竟然 ” You can’t imagine that well-behaved gentleman should be so rude to a lady. 6 、 should

10 1 )对过去情况推测。 must/may/might have done can’t/couldn’t/may not/might not have done can/could have done…? 7 、情态动词 +have done

11 2 )译成 “ 本 …”could/should/need have done. You should have come here five minutes earlier. 3 )虚拟语气(与过去事实相反的主句) If you had followed my advice, you wouldn’t have been defeated.

12  情态动词典型例题专练

13 2. 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 ; wouldn't B

14 3. The fire spread through the hotel very quickly but everyone _____get out. ( D ) A.had to B. would C. could D. was able to

15 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

16 5. With so much work on hand, you ____to see the game last night. ( ) A.mustn’t go B shouldn’t go C. could have gone D. shouldn’t have gone D

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

18 7.She must have forgotten about the class _______? ( ) A.doesn’t she B. mustn’t she C. hasn’t she D. won’ t she C

19 8. See who’s there ! _______ it be Mary ? A. May B. Must C. Can D. will C

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

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

22 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

23 Would you change this bucket for another ? It ______ hold water OK. I’m really sorry. A.won’t B.can’t C.didn’t D.doesn’t A

24  13. 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 C

25 I though I ____something burning. ( ) ---Really ? A.smelled B. was smelling C. could smell D. might smell C

26 15. 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 C


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