发布网友 发布时间:2022-04-26 22:52
共2个回答
热心网友 时间:2022-06-19 11:25
1、表示过去某一时间或动作以前已经发生或完成了的动作。它表示动作发生的时间是“过去的过去”,侧重事情的结果
2、表示发生在过去的动作对过去的某一点造成的某种影响或结果,用来指定在另一个过去行动之前就已经完成了的一个事件,侧重事情的结果。
We had learnt fifteen lessons by last week. 到上周为止,我们学完了十五篇课文。
He had stayed here for two days before he left. 他走之前在这儿呆了两天。
He said that he had lived there since he was ten. 他说他十岁起就住在那儿了。
2. 过去完成时的结构
过去完成时由“had + 过去分词”构成。
3. 过去完成时的应用
(1) 与过去完成时连用的时间状语可以多种多样,使用它的主要依据是看其是否发生在“过去的过去”。如:
He had learnt some English before I went here. 在来这儿之前我学过一些英语。
He had written three stories by last year. 到去年他已经写了三篇故事。
We had cleaned the room when he got there. 当他到那儿时,我们已经把房子弄干净了。
He went there after he had finished his work. 他把事做完之后,就去哪儿了。
注意:当主句跟由before, after, as soon as所引导的时间从句的动作连接很紧密时,从句也可用一般过去时。
He went there after he read the letter. 他看了那封信后就去那儿了。
热心网友 时间:2022-06-19 11:25