题目内容

14．-Oh dear!Look at the mountains of trash in the street and the terrible haze these days!
-Everyone's effort counts．I ______ fireworks on New Year's Eve!（　　）
A．needn't have playedB．mustn't have played
C．shouldn't have playedD．couldn't have played

分析 -哦，亲爱的！看看街上的垃圾和这些天可怕的阴霾!
-每个人的努力都是重要的．我本不应该在除夕放烟火的！

解答 答案为C．shouldn't+have+done表示本来不应该做某事，而实际做了．含有指责对方或自责的含意．再结合句意我本不应该在除夕放烟火的！可知答案，故选C．

点评 情态动词+have+done是历年高考的重点和难点之一，一定要理解结构与用法．
needn't+have+done则表示"本来不需要做某事而做了"．I needn't have bought so much wine-only five people came．我本来没有必要买这么多酒，只来了五个人．
must+have+done表示对过去事情的肯定推测，译成"一定做过某事"，该结构只用于肯定句．
It must have rained last night，for the ground is wet．昨晚一定下雨了，因为地面还是湿的．
shouldn't+have+done表示本来不应该做某事，而实际做了．含有指责对方或自责的含意．
Look，Tom is crying．I shouldn't have been so harsh on him．看，汤姆哭了，我本来不应该对他如此严厉．
could have done 表示"过去本能够做某事却未做．"
couldn't have done 没有虚拟语气的用法，表否定推测，"不可能做过某事"

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