16) in与after
in 与 after 都可以表示时间,但二者有所区别。
1.in 经常用于将来时的句子中,以现在为起点,表示将来一段时间。如:
He will leave for Beijing in a week. 一周后他会动身去北京。
2.after 经常用于过去时的句子中,以过去为起点,表示过去一段时间。如:
He left for Beijing after a week. 一周后他动身去了北京。
不过,如果after后跟的是具体的时刻,它也可用于将来时。如:
We will finish the work after ten oclock.十点后我们会完成工作的。
3.注意区分以下的in的用法。
Ill visit him in a week. 一周后我会去拜访他。
Ill visit him twice in a week. 一周内我会去拜访他两次。
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