Question

两年后是after two years还是in two years？

Answer 1

after two years

Answer 2

都行，看怎么个用法了

追问

那他们有什么区别

追答

after two years 用于"一般过去式"
in two years 用于将来式

追问

举个例子吧 麻烦你了。。。

追答

After two years of marriage they parted company.
婚后两年他们分手了。
I'll be a doctor in two years.
两年之后我将会成为一名医生。