题目

3.I( )have watched that movie—it`ll give me horrible dreams
A.shouidn`t B.needn`t C.couldn`t D.mustn`t
4.Jack described his father ,who()brave boy many years ago,as a strong-willed man.
A.would be B.would have been C.must be D.must have been
5.--Sorry.Professor Smith ,I didn`t finish the assignment yesterday.
--Oh,you()have done it as yesterday was the deadline.
A.must B.mustn`t C.should D.shouldn`t
如果只给答案不写原因的就免了

提问时间：2020-08-03

答案

A.shoud not have done不该做某事（但实际应该做了）
needn`t have done不必要做（但实际上还是做了）
后面两个意思可以照着上面的理解,因为都是虚拟语气,所以表示的意思相反
D.must have been 那时一定是（PS：你那个句子后面是不是省略了一个冠词“a”啊）
would be 表示对将来的假设
would have been 本应该是（但实际不是）
must be 一定是（一般用在现在时）
C.shoud have done应该做某事（但实际没做）
这些基本都是考察虚拟语气的吧