What...is that...是什么句型?（请分析一下句子结构,）例如What surprises us is that she doesn't know where the difference between the two lines.

what...is that是什么短语 “That is what he wants.” 是什么从句?what是什么代词? that is what we tell ourselves,这里what是什么用法 that is what we tell ourselves,这里what是什么用法 有一首歌是什么 There is a song that is what what is that? what shit is that? haha what is that what good is that? What coler is that that is what she said的意思是什么 what is that over there的中文是什么? what is Nancy there over that 连成一句话是什么 what you can't see is that 是什么从句 that is what I trying to do 是什么从句Jim,that is what I trying to do 是什么从句 what is important is that what is in the box和what is that in the box的区别是什么 What is it that he makes him what he is.又是什么结构请详解.