情態(tài)動詞課件

1、1、Could I borrow your book? Yes. Of course you can.2. Would you like to do it for me ? Yes. I would.一、情態(tài)動詞注意事項一、情態(tài)動詞注意事項(1) 對現(xiàn)在或將來情況推測：對現(xiàn)在或將來情況推測：must +動詞原形。動詞原形。must只能用于肯定。否定和疑問分別用只能用于肯定。否定和疑問分別用cant和和can。He must tell a lie. Can he tell a lie ?He cant tell a lie.*Must-should/ought to may-might/coul

2、d+do可能性依次減弱可能性依次減弱2、推測語氣、推測語氣(2) 對過去情況推測：對過去情況推測：must (may, might)+完成時。完成時。You must have met him before. mustmaymight可能性依次減弱可能性依次減弱must只能用于肯定句，譯成只能用于肯定句，譯成“一定一定”。否。否定和疑問分別用定和疑問分別用cant / couldnt和和can / could。Could /Can it have happened last night ?It couldnt/cant have happened last night.He must be r

3、eading, isnt he?You must do it yourself, dont you?He must have gone over the article, hasnt he?It must have rained last night, didnt it?3、表猜測語氣的反意疑問句的構成、表猜測語氣的反意疑問句的構成 would need used to do dare mustnt dont have to=needntmay/might do/have done不妨不妨; 還是還是為好為好4、 be able to must can have to1）用于第一人稱表將來。）

4、用于第一人稱表將來。I shall go to work after I have finished school.2）用于一、三人稱疑問句、表征求對）用于一、三人稱疑問句、表征求對方意見或向對方請求。方意見或向對方請求。Shall he come in? Come in, please.3）用于二、三人稱，表示保證、承諾、）用于二、三人稱，表示保證、承諾、威脅、警告。威脅、警告。You shall be punished if you insist on doing it this way.5、Shall1）預測、可能。）預測、可能。They should be here by now.2）

5、說話人的感情。如驚奇、憤怒、）說話人的感情。如驚奇、憤怒、失望等、失望等、“竟然竟然”You cant imagine that well-behaved gentleman should be so rude to a lady.6、should1）對過去情況推測。）對過去情況推測。 must/may/might have donecant/couldnt/may not/might not have donecan/could have done?7、情態(tài)動詞、情態(tài)動詞+have done2）譯成）譯成“本本”could/should/need have done.You should h

6、ave come here five minutes earlier.3）虛擬語氣（與過去事實相反的主句）虛擬語氣（與過去事實相反的主句）If you had followed my advice, you wouldnt have been defeated.情態(tài)動詞典型例題專練1.-There were already five people in the car but they managed to take me as well. -It _a comfortable journey. ( )A.cant be B. shouldnt beC. mustnt have been D.

7、 couldnt have beenD2. Johnny, you _play with the knife, you _hurt yourself. ( )A. wont ; cant B. mustnt ; mayC. shouldnt ; must D. cant ; wouldntB3. The fire spread through the hotel very quickly but everyone _get out. ( )A.had to B. wouldC. could D. was able toD4. -When can I come for the photos ?

8、I need them tomorrow afternoon.-They _be ready by 12 : 00 . ( )A. can B. shouldC. might D. need B 5. With so much work on hand, you _to see the game last night. ( )A.mustnt go B shouldnt goC. could have goneD. shouldnt have goneD6.They are disappointed at the English party. They say that it _better

9、organized. ( )A. had been B. had to beC. must have been D. could have beenD7.She must have forgotten about the class _? ( )A.doesnt she B. mustnt sheC. hasnt she D. won t sheC8. See whos there ! _ it be Mary ?A.May B.MustC.Can D.willC9.Jenny _with him at that time, for I was having dinner with her i

10、n my home. ( )A. cant have been B. mustnt have beenC. must be D. may be A10.Toms father promised, “You _have a new computer if you pass the coming examination,” ( )A.can B. should C. shall D. mayC11.- Did you walked home by yourself last night ? - Yes, I did. But I think I _. ( )A. neednt B. shouldntC. may not have D. neednt haveD12.-Would you change this bucket for another ? It _ hold water. - OK. Im really sorry.A.wont B.cant C.didntD.doesntA13. You ought to have helped him with his English, _you ?A. wont you B. ought not youC. shouldnt youD. wouldnt youC14.- I though I _something burning.