we could have had it all为什么不直接用have it all?

题目

we could have had it all为什么不直接用have it all?
比如we could have it all不行吗?请说出为什么.

答案

could+have done的结构为虚拟语气中对过去事情的假设,意思是本来能够做某事而没有做.we could have had it all的意思就是说我们本来可以拥有一切,但是实际上并未拥有一切.we could have it all则不能表示这样的意思,...