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这里为什么要用现在完成式?Not(havingreceived)areply,hedecidedtowriteagain.为什么要用现在完成时?哪里看出来要用现在完成式?

题目详情
这里为什么要用现在完成式?
Not (having received )a reply,he decided to write again.
为什么要用现在完成时?哪里看出来要用现在完成式?
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答案和解析
在这动词的ING是做原因状语
这是一道高考选择题.原题是
________ a reply, he decided to write again.
A. Not receiving
B.Receiving not
C. Not having received
D. Having not received
本题答案是C.考查分词的时态与分词的否定式.根据题意判断,分词的动作(接信)发生在谓语动词的动作(决心再写信)之前,因此用分词的完成式.分词的否定式的构成为not +分词,故选C.该句可理解为:Because he had not received a reply, he decided to write again.