after + 一段时间 和 after+点时间 这个时态有区别吗?

after+点时间：He came home after 10 o'clock last night.
after + 一段时间(这里的时间段一般不是具体时间,如,一般不说after three days ,,而是three days after.,但可以说 after a period of time ) ,如：
They had known the news three days after.
After a period of time / After a while,he returned.
时态的用法区别也应该明了吧!

没有
例如：After a while,he came here.
After five, he came here.
老师祝你学习进步！
望采纳，多谢^_^那 Tom didnot watch TV ____half past nine A after B until 我知道选B not ....until 但老师问我们为什么a...

after + 时间段，常用于过去时
after + 时间点，可用于各种时态