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1、重点 11情态动词+动词不定式完成结构的用法1)must have done 过去一定做了某事,只用于肯定句。2)cant/couldnt have done 过去不可能做了某事3)could have done “本来可以”(表示过去没有实现的可能)。4)may /might have done “本来可能;本来应该或可以做某事”(实际没有发生;含有轻微的责备语气。5)should/ought to have done “本来该做某事”(而实际未做)6)should not/ought not to have done “本来不该做”(实际却做过了,含有责备语气)7)neednt have
2、done “本来不必做”(但是已经做过了)8)would rather have done “当时宁愿做了某事”(实际没有做过);否定式would rather not have done, 表达相反意思“宁愿当时没有做某事”,两者都有后悔之意。练习: 1. We have bought so much food now that Suzie wont be with us for dinner.Amay notBneedntCcant Dmustnt (2020江西) 2. I met Mr. White shortly after the Second World War, and tha
3、t _ about March 1946, I suppose.A. is B. maybe C. must have been D. may have been3. My sister met him at the Grand Theater yesterday afternoon, so he _ your lecture.A. couldnt have attended B. neednt have attendedC. mustnt have attended D. shouldnt have attended4. He _ have completed his work; other
4、wise, he wouldnt be enjoying himself by the seaside. A. should B. must C. wouldnt D. cant(北京) 5. Catherine, I have cleaned the room for you. Thanks. You _ it. I could manage it myself.(福建) A. neednt do B. neednt have done C. mustnt do D. shouldnt have done 6. If the traffic hadnt been so heavy, I co
5、uld have been back by 6 oclock. What a pity! Tina _ here to see you.(湖南) A. is B. was C. would be D. has been 7.A traffic accident happened on the highway, and a driver _.A. may have hurt B. may be hurting C. may be hurt D. may have been hurt8. He paid for a seat, when he _ have entered free.(山东) A. could B. would C. must D. need