must have been是什么时态

must have been是完成时态。

must：modal (表示必要或很重要)必须; (表示很可能或符合逻辑)一定; (提出建议)应该，得。

have：vt. 有; 持有; 占有; 由…组成; 显示出，带有(性质、特征)。

been：v. 曾经; 曾经到过(某地)。

扩展资料

I must have been blind not to realize the danger we were in.

当时我一定是眼瞎了，竟然没有意识到我们所处的危险。

Judging by the company he kept, Mark must have been a wealthy man.

根据马克所交往的人来判断，他一定是位富翁。

It couldn't have been me ─ it must have been someone else.

那不可能是我——准是别人。

The car must have been doing at least 100 miles an hour.

这车速肯定每小时至少100英里。

I must have been insane to agree to the idea.

我肯定是犯傻了，居然同意了这个想法。