《情态动词英语_必修3_unit_2》由会员分享，可在线阅读，更多相关《情态动词英语_必修3_unit_2（34页珍藏版）》请在金锄头文库上搜索。
1、 语法讲义之情态动词 modal verbs1.-Is John coming by train? -He should, but he _ not. He likes driving his car. A. must B. can C. need D. may 2.It has been announced that candidates(候选人)_ remain in their seats until all the papers have been collected. A. can B.will C. may D. shall 3.-I heard they went skiing
2、in the mountains last winter. -It _ true because there was little snow there.A. may not be B. wont be C. couldnt be D. mustnt be情态动词表示推测不表示推测can could may might shall should must will would ought tohave to dare (darent) need (neednt) used to表示推测情态动词的重要用法. 1. You must be Mr Smith-I was told to expect
3、 you here. 2. He must have known what we wanted. 3. We may have read the same report. 4. He cant have slept through all that noise. 5. Theres someone outside-who can it be? 6. What can they be doing? 7. These pills might help to cure your disease. 8. You could be right, I suppose.表示推测情态动词的重要用法.肯定的推测
4、可能的推测否定的推测疑问的推测must对将来 对现在 对过去情态动词may, might couldcant, couldntcan, could+ V. + V. + have done 常见must be + be doing+ V. + V. + have done+ be doing可以用not表示“可能不” +V. + V. + have done+ be doing+ V. + V. + have done+ be doing1. I dont know where she is, she _ be in Wuhan.2. At this moment, our teacher _
5、our exam papers.这时，我们老师想必在批改试卷。3. The road is wet. It _ last night.(rain)4. Your mother _ for you.你妈妈一定一直在找你。maymust be markingmust have rainedmust have been looking5. Philip _ seriously inthe car accident. 菲利普可能在车祸中受了重伤.6. -Linda has gone to work, but her bicycle is still here.-She _ (go) by bus.7.
6、 Mike _ his car, for he came to work by bus this morning.迈克一定还没有找回他的车，因为早上他是坐公共汽车来上班的。may (might) have been hurtmay (might) have gonecant have found一、表示对已发生的事情的推测 must have done 肯定句 表示肯定推测may/might have done 肯定句 表示可能性推测cant/couldnt have done 否定句 表示否定推测特殊疑问词+can/could have done? 特殊疑问句 Can/could+ have
7、 done? 一般疑问句表示疑问推测 情态动词+have done的用法 高考考题:1. I thought you _like something to read, so I have brought you some books. A. may B. might C. would D. must 2. Where is my pen? I _it. A. might lose B. would have lost C. should have lost D. must have lost3. I didnt hear the phone. I _asleepA. must be B. mu
8、st have been C. should be D. should have beenB D B 4. -There were already five people in the car, but they managed to take me as well.-It _a comfortable journeyA. cant be B. shouldnt be C. mustnt have been D. couldnt have been 5. Its nearly seven oclock . Jack _be here atany moment.A. must B. need C
9、. should D. couldD D 不同的“肯定”程度可按下列层次排列： He is at home. (事实) He must be at home.（非常肯定的推断） He could be at home.（很可能） He ought to be at home.（很可能） He may be at home.（仅仅可能而已） He might be at home.（或许, 非常不确定） He might not be at home.（也许不在家） He may not be at home. （比might可能） He couldnt be at home.（很可能不在家）
10、He cant be at home.（一定不在家） He isnt at home.（事实） 二、表示对过去所发生的事情的遗憾或责备 “本”should/ought to have done 本该做却没做shouldnt/ought not to have done 本不该做却做了could have done 本有能力做却没做neednt have done 本没必要做却做了would have done 本打算做却没做=would like/love to have donewould rather have done 宁愿做却没做在不表示推测的情态动词中, 我们要注意以下考点:1. 表
11、示能力、许可的情态动词的用法。2. 表示否定的情态动词的用法。3. shall 和 will 的多种意义的区别。4. 情态动词短语的使用。5. 虚拟语气中情态动词的使用。表示能力: can, could, be able to*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.。1. 表示能力、许可的情态动词的用法。1. A computer _ think for itself; it must be t
12、old what to do.A. cant B. couldnt C. may not D. might not2. The fire spread through the hotel very quickly but everyone _ get out.A. had to B. would C. could D. was able toA D 3. They will _ run this machine on theirown in three months.A. can B. could C. may D. be able to4. That big cinema _ seat 2,
13、000 people.A. can B. should C. ought to D. is able toD A 表示许可: may / might, can / could * might, could 比较委婉, 一般多用于疑问句.* can, may 表达的语言比较随便.* 在以could, might 表示征询对方意见或表示请求时，回答应相应使用can, may.5. Could I borrow your dictionary? Yes, of course you _.A. might B. will C. can D. should6. Might I watch TV after supper? Yes, you _.A. may B. must C. might D. canC A 2. 表示否定的情态动词
