-I am worn out now．I stayed up last night to finish the report．-Oh?You ．The professor asked us to hand it in next week．( )A．needn't haveB．wouldn't haveC．couldn't haveD．can't have 题目和参考答案——青夏教育精英家教网——

题目内容

7．-I am worn out now．I stayed up last night to finish the report．
-Oh？You ______．The professor asked us to hand it in next week．（　　）

A．

needn't have

B．

wouldn't have

C．

couldn't have

D．

can't have

分析 ---我现在已经筋疲力尽了，昨天晚上我熬夜完成了这个报告．
---哦？你本来不需要熬夜完成这个报告的，教授要我们下星期才上交．

解答答案A．
本题是两人之间的对话，选项中有语义省略的现象，have后面省略了"stayed up last night to finish the report"．need not have done表示过去已做…事了，但事实上没有必要做．wouldn't have done它表示的是与过去事实相反之假设的结果，意思是"（过去）当时就不会做…了"，而实际上做了…；cannot have done/couldn't have done这两个形式表示推测，意思是"过去应该不可能做…"．根据句子所表达的意思和下文的语境"The professor asked us to hand it in next week．"可知答案选A．

点评本题考查虚拟语气和"情态动词+have+done"结构的含义及用法．"情态动词+have+done"，表示对过去行为或动作进行推测、评论或判断，这个结构是近几年高考情态动词的重点和难点．

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