谁能给我讲解一下和could never have done 的相关知识

Question

如题所述

Answer 1

“情态动词 + have done”常用作虚拟语气对已发生行为的进行假设，如：

If it had been the same as it were, you could never have done it.  如果它还是原来的样子，那么你就从没有做过（事实上你已经做过，它已经不是原来的样子了）。

He seemed thehe could never have done it.  他似乎从来也没有完成它（事实上已经完成了）。