情态动词表示对过去的推测时,怎样区分过去时和完成时.
问题描述：
情态动词表示对过去的推测时,怎样区分过去时和完成时.
比如：I'm sorry.I___at you the other day.A.shouldn't shouted B.shouldn't have shouted
答
此题选B.情态动词对过去的推测没有过去时的用法,基本结构为:情态动词+have done.注意：must have done 对过去动作的推测,意思为 过去一定做过e.g.he must have stolen my money last night since he was the last le...