情态动词中考英语专题复习ppt课件.ppt

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1、Revision for Modal Verbs, The basic uses of Modal Verbs,1. Can,Could 过去式；语气更委婉,Can 表示习惯能力， 而be able to表示经过努力而做成了某事。2. 在否定结构中，二者可以互换。,1.在否定、疑问句中表示“对过去发生行为 的可能性猜测。2. 在肯定句中表示“本来可以做而未做”,The door was locked. She couldnt have been at home.You could have been more careful.,1. May,Might 过去式；语气更委婉,1.在否定、肯定句中

2、表示对过去动作的推测 “也许是”2. Might+have+p.p表示虚拟，表“劝告、责备之意。”,Eg. 1. She may be still waiting for us. 2. May I come in? 3.May you have a happy holiday.,Eg. 1. He might have spoken to her yesterday. 2. You might have told me earlier. 土豆-服装,1. Must,表示肯定的猜测,但只用于肯定句，而mustnt 表示“禁止、不准”,Must表示主观Have to表示客观需求Have got t

3、o 多见于口语,3. must + have +p.p,对过去事情的肯定猜测。,Eg. The road id wet. It must have rained last night.,1、Shall /should,2、shall/should + have +p.p ought to,表示本应该做而未做。,should 过去式 语气更委婉,Eg. You should have been five minutes ago.,Will/ would,1、情态动词用于否定、疑问句；条件从句中。 eg. 1. Dare you go here alone? 2. How dare you do

4、such foolish things? 3. I wont allow you to swim in the river, even if you dare do it.,Dare / dared,2 、做实意动词后加不定式。 eg. I have never dared to tell him about it.,Need /needed,1、情态动词用于否定句，疑问句。,2、实意动词用法似dare,用作不定式。,3、need + not + have +p.p 表示“本来不需要做而做了。,Ought to,1、其否定式为ought not to,2、ought to + have + p

5、.p 表示本来应该做而没有做到。,Eg. You ought not to have cut away the trees around the old building.,三点说明,1、情态动词 + v 表示对现在或将来动作的猜测。 情态动词 + have + p.p表示对过去动作的猜测。,2、情态动词的过去式与原形相比，多点礼貌，少点冒昧， 语气更为委婉。,情态动词在一般疑问句中的回答： Can you sing? May I come in? Must I hand in the book now? Need I finish it now?,典型错误,1. He mustnt be i

6、n the classroom. ( ),Cant,2. You might leave the bag on the bag. ( ),might have left,3. You must have seen the film last week, havet you? ( ),didnt you,4. Li ming must have been to Japan, didnt he? ( ),hasnt he,13,1.-There were already five people in the car but they managed to take me as well. -It

7、_a comfortable journey. ( )cant be B. shouldnt beC. mustnt have been D. couldnt have been,D,14,2. Johnny, you _play with the knife, you _hurt yourself. ( )A. wont ; cant B. mustnt ; mayC. shouldnt ; must D. cant ; wouldnt,B,15,3. The fire spread through the hotel very quickly but everyone _get out.

8、( )had to B. wouldC. could D. was able to,D,16,4. -When can I come for the photos ? I need them tomorrow afternoon.-They _be ready by 12 : 00 . ( )A. can B. shouldC. might D. need,B,17,5. With so much work on hand, you _to see the game last night. ( )mustnt go B shouldnt goC. could have goneD. shoul

9、dnt have gone,D,18,6.They are disappointed at the English party. They say that it _better organized. ( )had been B. had to beC. must have been D. could have been,D,19,7.She must have forgotten about the class _? ( )doesnt she B. mustnt sheC. hasnt she D. won t she,C,20,8. See whos there ! _ it be Ma

10、ry ?May MustCan will,C,21,9.Jenny _with him at that time, for I was having dinner with her in my home. ( )cant have been B. mustnt have beenC. must be D. may be,A,22,10.Toms father promised, “You _have a new computer if you pass the coming examination,” ( )can B. should C. shall D. may,C,23,11.- Did

11、 you walked home by yourself last night ? - Yes, I did. But I think I _. ( )neednt B. shouldntC. may not have D. neednt have,D,24,12.-Would you change this bucket for another ? It _ hold water. - OK. Im really sorry.wont cant didntdoesnt,A,25,13. You ought to have helped him with his English, _you ?A. wont you B. ought not youC. shouldnt youD. wouldnt you,C,26,14.- I though I _something burning. ( )-Really ?smelled B. was smellingC. could smell D. might smell,C,27,15. She _out alone at night. ( )dare not to go B. dares not goC. doesnt dare to go D. doesnt dares go,C,