after did sth.和after doing sth.有什么区别?

问题描述:

after did sth.和after doing sth.有什么区别?

没有直接after did sth用法.应该是after sb did sth 吧.这个后面是一个句子.
after doing sth.是直接接一个动名词.
两者意思一样.