after可以用作副词
after用作副词时常与soon, ever搭配,通常用于表示时间的名词后。
after用作副词时不用于比较等级。
例句：
They met in June and became lovers soon after.
他们在六月相遇, 不久就成了情侣。
The day after, he apologized.
次日，他道歉了。
They lived happily ever after.
他们後来一直生活得很幸福。
I need time to get my wind back after that run.
我跑过之后需要时间喘口气。
I could come next week, or the week after.
我可能下周来，或者再下一周。
The first 24 hours after the operation are the most critical.
病人手术后头24小时是最危险的。