mary could not have received my letter,otherwise she would h

来源：学生作业帮编辑：百度作业网作业帮分类：英语作业时间：2024/08/20 00:11:36

mary could not have received my letter,otherwise she would have replied to me last week.
为什么要用would have replied 是过去将来完成时吗?为什么?

could not have done 是情态动词中比较特殊的用法,不是虚拟语气,是表示对过去的推测,意思是：过去不可能做了某事.这个句子的后半句是虚拟语气,用would have done来表达跟过去事实相反.
这个句子的意思是：玛丽不可能收到了我的信,否则她上星期就给我回信了.

mary could not have received my letter,otherwise she would h Mary ______ my letter; otherwise she would have replied befo 并说明原因,1.Mary my letter; otherwise she would have replied bef Mary couldn't have received your letter;otherwise she___ to 英语翻译Mary couldn't have received my letter,or she should have 完成时态的用法mary couldn't have received my letter,or she have rep Jack _can not have arrived_yet,otherwise he would have telep this time Tom____careful enough,otherwise he would not have Tina ___ the truth,otherwise she would have told us. I have just received a letter from my brother, Ti If she had returned an hour earlier,Mary would not have been Mary is not thin.she is h().