题目内容：

It seemed that you had read the book.=You ____ ____ ____ ____the book.

优质解答

seemed to have read

追问：

谢谢，请问have不是助动词吗，seem不是动词吗，为啥have不放在seem前？

追答：

这是系动词seemed 接不定式的完成式作表语， 所以to have+过去分词 在后