浅谈中学英语时态的用法(2)

2017-11-17 01:47

导读：He has studied English for 5 years. He has studied English since 1985. Now I have finished the work. 注意：表示短暂时间动作的词，如:come, go, die, marry, buy等的完成时不能与for,

He has studied English for 5 years.

He has studied English since 1985.

Now I have finished the work.

注意：表示短暂时间动作的词，如:come, go, die, marry, buy等的完成时不能与for, since等表示一段时间的词连用。

3）现在完成时还可用在时间和条件状语从句中，表示将来某时完成的动作。例如：

I’ll go to your home when I have finished my homework.

If it has stopped snowing in the morning, we will go to the park.

7. 过去完成时的用法

）过去完成时由“had 过去分词” 构成，过去完成时的动作表示过去某一时刻或某一动作之前完成的动作状态。句中常用by, before, until, when等词引导的时间状语。例如：