反义词：before.

造句

I went to the post office immediately after I left you.

离开你之后我立刻就去了邮局

2

Let's go for a walk after breakfast.

我们早饭后去散步吧

3

After the iPhone came out， all the other phone companies jumped on the touch-phone bandwagon.

当iPhone问世之后，其他手机厂商纷纷加入触屏手机的行列。