I don't think you could answer it的反义疑问句

could you ?在I think.这种句型中,反义疑问句时要对从句进行提问,而这种句型中如果从句表达的是否定,而且带有not的,通常进行否定转移,即把not提前,放到think前面,因为think是一般性动词,所以还要用do,这样就变成I don’t think.,根据前肯后否,前否后肯原则,本义是you could not answer it ,因此提问时用could you?