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1、 2022届高三英语语法专题复习讲义-情态动词含配套练习1. 表示恳求和允许: can, could , may, might. 过去式使语气更委婉，答语应用原形。 - Could I use your computer tomorrow morning? - Yes, you can.( 否认答复可用：No, Im afraid not.)2表示推想： 理论可能性 can 可能性 确定句 must, may ,might, could 疑问句 can否认句 cant (不行能)，may not (可能不) 1)can表示理论上的可能性，指某事或状况可能发生，但并不说明实际上真的发生. Chi
2、ldren can be very tiring. 2)反意问句。 He may know the plan, doesnt he? You must have studied English before, havent you?You can t have been caught in the rain last night, were you?3could would不与表示状态的动词连用。There used to be a hospital here. / There would be a hospital here.( )2) would 常与often, sometimes, f
3、or hours等表示时间的副词（短语）连用。We would sit in the yard every evening and listened to his story.3) used to 强调过去的行为同现在的比照，含有“过去怎样，而现在却不这样了”的含义. eg. He will not spend the money on books as he used to.9. dare 和need两者作为情态动词都不用于确定句，常用于否认句、疑问句和条件从句中。习惯用语I dare say（可能，或许，我揣测）除外。实义动词用法同于一般动词。但在否认句中，dare 后的to可省略，即：d
4、ont / doesnt dare (to ) do. need 作为实义动词时，用在否认句中时，其后的to不能省略。He dare go there alone. ( ) He dares to go there.He dares not go there alone. ( ) He dare not go there alone . / He doesnt dare ( to ) go there alone.He stood there without daring lift his head.() He stood there without daring to lift his he
5、ad.10情态动词+ have done,表示过去 比拟： 情态动词+ do , 表示现在或将来。cf. neednt have done in that case, his mother will be very disappointed. a. must have failed B. might fail C. could have failed D. should fail 9. - Why _ it rain now? I _ go to the concert at 7.- What a pity! A. can; might not B. should; neednt C. mus
6、t; cant D. need; mustnt 10. - We need some fresh air, but the window open.- _I help you ?A. didn”t; Will B. shan”t; Need C. mustn”t ; May D. won”t; Shall11. - What do you think of your nephew?- He be very naughty but at the same time you _ help liking him. A. will; will b. wont ; cant C. may; may D.
7、 can; cant 12. It was not possible that she_ go down, step by step down the unexpected stairs into the dark below.A. should dare B. should dare to C. must dare D. must dare to13. - I am told that John had another car accident this morning.- I believe not. He _ so careless. A. shouldnt have been B. w
8、ouldnt have been C. couldnt have been D. mustnt have been14. -You ought to have given them some advice. -_, but who cared what I said? A. So I ought B. So ought I C. So I did D. So did I 15 -Write to me when you get home. -_. A.I must B. I should C. I will D. I can16. Shut your mouth. Nothing _ stop
9、 me once I have made up my mind. A. will B. ought to C. shall D. must 17. Keep up a good state of mind even if you _fail plenty of times. A. must B. will C. can D. should 18. The policeman told the pupils. “You _ play football in the street.” A. cant B. neednt C. mustnt D. shouldnt 19. If you _ wait a moment, I will go and find our manager. A. can B. should C. will D. must 20. Dont believe him. His story _ be true. A. mustnt B. neednt C. shouldnt D. may not 情态动词：CDBCD CCBCD DBCCC CDCCD
