高三语法题:情态动词I ______ my car can't go more than 80.
问题描述：
高三语法题:情态动词I ______ my car can't go more than 80.
---You were driving at 100km an hour.
---But officer,I ______ my car can't go more than 80.
A.may not have been B.could not have been C.would not have been
选什么?为什么
答
选B
could not have done sth.
不可能做过
may not have done sth.
有可能没做过
would not have done sth.
不应该做过（就是说这是不对的）