She seemed to have read the book before,seemed可以换成seems,为什么
问题描述：
She seemed to have read the book before,seemed可以换成seems,为什么
答
seemed and seems,
可以换,只是意思有点不一样了.
“之前看过这本书”这件事可以是现在的情况,也可以是“她”过去的.