过去完成时的用法(过去完成时用法讲解)

过去完成时表示表示过去的过去。

1、表示在过去某一时间或动作之前已经发生或完成的动作。 表示的时间是"过去 的过去 "常与by last year, by the time of yesterday,等连用。

She said she had seen the film 4 times.

When Mr Li got to the classroom, all the students had begun reading.

By the time they arrived, the bus had left.

2、表示 从过去某一时间开始一直延续到过去另一时间的动作或状态。常与for (后跟段时间)或since (后跟点时间)等连用。

She had worked in this school since it opened 25 years ago.