作业帮过去完成时
来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/05/02 13:04:14
什么是过去完成时，过去完成时的标志是什么
解题思路： 如下
解题过程：
过去完成时
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。 他表示的时间是“过去的过去”，常与by last year, by the time of yesterday,等连用。如：
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.如:
She had worked in this school since it opened 25 years ago.
最终答案：略
解题过程：
过去完成时
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。 他表示的时间是“过去的过去”，常与by last year, by the time of yesterday,等连用。如：
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.如:
She had worked in this school since it opened 25 years ago.
最终答案：略