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发表于 2016-7-24 10:22:23
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4. 对已发生事情的肯定推测常用“must, may, might等+完成式”;否定推测常用“can, could, may, might等+完成式”。
①I was on the highway when this car went past followed by a police car. They _______ at least 150 kilometers an hour.(2005年重庆卷)
A. should have been doing B. must have been doing
C. could have done D. would have done
②He _______ have completed his work; otherwise, he wouldn't be enjoying himself by seaside. (2005年北京卷)
A. should B. must C. wouldn't D. can't
③—Tom is never late for work. Why is be absent today?
—Something ________ to him. (2005年江西卷)
A. must happen B. should have happened
C. could have happened D. must have happened
④ My sister met him at the Grand Theatre yesterday afternoon, so he_____ have attended your lecture.(2000年上海卷)
A. couldn't B. needn't C. mustn't D. shouldn't
二、“情态动词+完成式”
1. “should(ought to)+完成式”表示本应该做某事而实际上没有做。其否定式表示某种行为不该发生但却发生了。
①—I'll tell Mary about her new job tomorrow.
— You________ her last week. (2004年福建卷)
A. ought to tell B. would have told
C. must tell D. should have told
②Oh, I'm not feeling well in the stomach, I _____ so much fried chicken just now. (2002年上海春季卷)
A. shouldn't eat B. mustn't have eaten
C. shouldn't have eaten D. mustn't eat
2. “could+完成式”表示本来能够做成某事的但结果没能做成,含有遗憾的意味。
He paid for a seat, when he ______ have entered free. (2005年山东卷)
A. could B. would C. must D. need
3. “needn't+不定式的完成式”表示本来不必做某事而实际上做了某事。例如:
You needn't have watered the flowers, for it is going to rain.你本不需要浇花的,因为天就要下雨了。
— Catherine, I have cleaned the room for you.
— Thanks. You ______ it. I could manage it myself. (2005年福建卷)
A. needn't do B. needn't have done C. mustn't do D. shouldn't have done
三、常见的情态动词
1. shall用于一、三人称疑问句表示征求对方意见;用于二、三人称陈述句表示说话人给对方的命令、警告、允诺或威胁等。
①“The interest be divided into five parts, according to the agreement made by both sides,” declared the judge. (2004年重庆卷)
A. may B. should C. must D. shall
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