问题描述:
表示时间介词for+时间段,什么时候for是可以省略的,请说明具体情况,最好有例句.
如His uncle has worked on a space station for three years.中for可以省略吗?为什么?
We’ve been here for three weeks .中for可以省略吗?为什么?
如His uncle has worked on a space station for three years.中for可以省略吗?为什么?
We’ve been here for three weeks .中for可以省略吗?为什么?
问题解答:
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