选择You __ not have seen her yesterdays for she was abroad.You __________ not have seen her yesterdays for she was abroad.A.must B.shouldC.could D.would选什么?四个答案有什么区别?
问题描述：
选择You __ not have seen her yesterdays for she was abroad.
You __________ not have seen her yesterdays for she was abroad.
A.must B.should
C.could D.would
选什么?四个答案有什么区别?
答
选C，must的话要加be；should的意思是应该，放上去语句不通；这句句子是过去完成时，用wuold不对。
答
选A，翻译是你昨天一定没见到她因为她出国了，这是情态动词的虚拟语气。
答
选C.这是对过去的猜测.在表示猜测的否定时,情态动词要用can或could,不能用must；should若用在should not have done中表示“本不该做（但已经做了）”；would not have done用于虚拟语句中,比如：Without your help,I would not have succeeded.没有你的帮助,我不会成功的.注：would have done表虚拟时,不可置于从句中,而应在主句中使用.
答
A