介词after用法是什么

after作介词后面可以加做宾语的动名词，名词，代词。

一、after作介词的用法：

after+名词，作为介宾短语，

如：after 5 o'clock 五点以后。

He ran after the bus. 他在那辆公交车后追着跑。

after+动名词 ，也是作为介宾短语，

如：after having finished my homework 完成我的作业后。

I will go to bed after drinking the milk.

after+代词，作为宾语的主语，

如：He went home after he finished all the work

二、after做副词的用法：

如： three hours after三小时后; He told me after that he had not enjoyed the film. 他告诉我后来他一点都不想看电影。

三、after做连词的用法：

如 ：I saw them after I arrived.我到了之后才看到他们。