2015年成人英语三级时态复习:过去完成时
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过去完成时
1、表示在过去某时之前已经完成了的动作(即过去的过去)。这个过去的某一时间可用by， before等介词或连词引导的短语或一个从句来表示。
例：(1)We had scarcely reached the school before it began to rain. 我们刚到学校天就下雨了。
例：(2)By this time he had already made some friends. 到这时他已经交了一些朋友了。
2、表示从过去某一时间开始，一直持续到另一个过去的时间的动作。
例：When I got to the station the train had left.
我到达车站时火车已经离开了。
3、在含有before, after, as soon as 等连词引导的状语从句的复合句中，由于连词本身可以明确表示动作发生的先后顺序，因此，主句和从句都可以用一般过去时表示，而不用过去完成时。
例：I called him as soon as I arrived.我刚一到就给他打电话。
4、过去完成时常用在no sooner …than…, hardly/scarcely/barely…when…，一…就…。句型之中，句子倒装。
例(1)Hardly had I opened the door when he told me.
我刚开开门，他就告诉了我。
例(2)Scarcely had he opened the door when a gust of wind blew the candle out.
他刚打开门，蜡烛就被一阵风吹灭了。?
往年试题：
例(1)When I went to visit Mrs. Smith last week, I was told she ______ two days before.
A. has left B. was leaving C. would leave D. had left
答案：D
例(2)About the sixth century A.D. when few Europeans could read, the Chinese _____ paper.
A. invented B. had invented C. have invented D. had been invented
答案：B
例(3)The chemistry class _____ for five minutes when we hurried there.
A. had been on B. was on C. has been on D. would be on
答案：A
例(4)No sooner had we sat down _____ we found it was time to go.
A. than B. when C. as D. while
答案：A
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