有yet是什么时态

They haven't yet put a price on the business.

他们还没有给这笔生意开价。

You're good for a few years yet.

你还可以活上几年。

We haven't won yet, not by any means.

我们离成功还远着呢。

You don't need to leave yet, do you?

你不必现在就走吧？

Details of the government report have not yet been made public.

政府报告的细节尚未公布。