shouldn’t have done是虚拟语气么?

shouldn’t have done是虚拟语气么? couldn`t have done 不用于虚拟语气 么 情态动词+have done是虚拟语气吗? 英语 哪些情态动词+have done 是虚拟语气? must have done是虚拟语气的一种吧? 英语虚拟语气1.You shouldn't have run across the road without looki 虚拟语气would have done 的用法 关于could have done 的虚拟语气 虚拟语气 should have done 与 could have done 虚拟语气中对过去的虚拟主句否定是用would have not done or would not have done? 区别shouldn't have done 和 needn't have done should have done 它的否定式是 shouldn't have done