- before做副词时的用法before做副词时一般都用完成时,可
- before做副词时一般都用完成时,可放在时间的后面,那么:
他三天前来我们这的。He's been here three days before.
他曾当过兵。He has been a soldier before.
一周前他离开了。He's been away one week before.
这几句对吗?如果用过去时是否可以?
- 正确,before 也常用于过去式中,而最重要的一点就是: 在before引导的副词子句中,用现在式表示将来.
例:Shut the window before you leave.你离开前关上窗.
Only two days remained before the examination.考前只剩下两天了.
I have met Mary before.我以前见过玛丽.
I don't think we've met before.我想我们以前没有见过.