过去完成时标志词 五个

问题描述:

过去完成时标志词 五个
1个回答 分类:英语 2014-11-03

问题解答:

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1.before
I thought I had sent the letter a week before.
2.by
By nine o’clock last night,we had got 200 pictures from the spaceship.
3.过去完成时常常用在told,said,knew,heard,thought等动词后的宾语从句(或间接引语)中,这时从句中的动作发生在主句表示的过去的动作之前.
4.since
He said he had worked in that factory since 1949.
5.过去完成时还可用在hardly…when…,no sooner…than…,It was the first (second,etc)   time (that)…等固定句型中.
 
 
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