since后面的时态有什么规定

回答

爱扬教育

2022-04-08

当since表示“自从”时，不管它是用作介词、连词还是副词，它通常都要与现在完成时（since前）连用。
当主句表示“多长时间”时，动词可用一般现在时（当然也可用现在完成时）。

扩展资料

　　Since he changed jobs he's looked like a new man.

　　他跳槽之后像换了一个人似的。

　　I haven't seen him since the summer before last.

　　我已有两个夏天没见过他了。

　　They've been best friends since they were children.

　　他们从孩提时起就是最要好的朋友。

　　He's been working in a bank since leaving school.

　　他中学毕业以后一直在一家银行工作。

　　The hotel has polished up its act since last year.

　　这家酒店自去年以来已经改善了服务水平。