looked so tired this morning.He( )late last night.
题目
looked so tired this morning.He( )late last night.
A.must stay up
B.must have stayed up
C.was staying up
D.has stayed up
选哪个呢?可以选A吗?为什么?
答案
选B啊~A不行的,must do表示一定要做什么,must have done是一定做过什么,stay up肯定是做过了所以才会tired的~
举一反三
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
最新试题
热门考点