after放句首的时态

回答
爱扬教育

2022-10-10

  • 相关推荐
after做介词时,后面只能加名词、代词、动名词短语,形成介宾短语,做句子的状语;after后面直接加一个动词时,它作为一个介词,动词用ing形式。after的前后时态遵循“主将从现”原则。

扩展资料

  由 after,before,和 when 引导的状语从句在复合句中的位置比较灵活,放在句首或句末通常不会影响原句的意思:

  After I called you,I put it back = I put it back after I called you.我给你打电话后,把它放回去了。

  Before I came,did anything happen?= Did anything happen before I came?在我来之前,有什么事发生吗?

  When I saw my friend,he was eating.= My friend was eating when I saw him.当我看到我的朋友时,他正在吃饭。