Do you think who he is 这个句子成立吗

Do you think who he is 这个句子成立吗 请问 who is he?这个句子的主语是who吗?那么为什么插入do you think 后,变为who do you who is he 和do you think 合成一个句子 do you know who he is 和who do you think is he?的区别 how old do you think he is?和who do you think is the best stu who do you think he is waiting for?中do you think 何成分 who do you think is getting hooked Who do you think it is that he will have ______ the letter?A what do you think of your deskmate?Oh,he is a___ student who who do you think the best man is?还是who do you think is the b Do you think who the best student is?还是Do you think who is t do you think who she is?who do you think she is?这2个句子的语法作何解释