Question

现在完成时的否定形式推测不是 can't have been 这个句型吧？

Answer 1

我认为他以前不是个芬兰人

I don't think she used to be a Finn

我想她不可能是芬兰人

I think he can not have been a Finn

She can't have slept through all that noise

他不可能在那种乱哄哄的地方睡觉

Can't have been

表示不可能发生的事情

在这里是可以用于他不可能是个芬兰人

我想她一定是芬兰人

I think she must be Finnish

I think she must have been a Finn

满意，请采纳

Answer 2

这是对过去动作或状态的推测。