She must have read the novel last week,didn't she? 如根据last week用过去时,那陈述句中为什么用have?
问题描述：
She must have read the novel last week,didn't she? 如根据last week用过去时,那陈述句中为什么用have?
答
must后面跟动词原型
答
表推测的
答
must情态动词后都加动词原形
答
must后面就是跟动词原形的
答
must have 表示对过去的推测,可译为“过去一定做过…”
答
must have done是过去一定做某事。这里的have没有具体的意思