过去完成时标志词 五个

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过去完成时标志词五个过去完成时标志词五个过去完成时标志词五个1.beforeIthoughtIhadsenttheletteraweekbefore.2.byBynineo’clocklastnigh

过去完成时标志词 五个
过去完成时标志词 五个

过去完成时标志词 五个
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.

had done ; had been done