原文有语法错误啊!
那个which应该改成whose,指带book's 要是which的话就没有所有格的含义了.要用which的话也应该在其前面加个of才对.
换成正陈述语气
you have got the book of which cover is red.
you 主语
have got谓语
the book宾语
of which cover is red限定义定语从句,修饰the book.