-have you ever seen the film?-yes I _it three times when I lived in the USA答案是saw,为什么?
问题描述:
-have you ever seen the film?-yes I _it three times when I lived in the USA答案是saw,为什么?
为什么不选have seen?
答
when I lived in the USA是个具体时间点,完成时不与时间点连用