before属于什么时态
问题描述:
before属于什么时态
要全部说出来
答
可用于一般现在时,一般过去时,现在进行时,过去进行时,现在完成时或过去完成时等,如
I have never been there before.
He had worked for ten years before he joined the army .
He sits before me .
He stood before me yesterday .
He is standing before me now.