can you tell me when he will come?这个句子为什么不能选will he come/doe

Can you tell me when will he come back可以 而Can you tell me wh tell me when he will come back Could you please tell me when he will come 为什么用will而不是would I will tell you when he will come back ---could you tell us( )he will come? could you tell me that he will come here soon这句话为什么错? When will he come to see you? can you tell me when you will come back和can you As soon as he comes back,I will tell him when( you will come When he will come back can you tell me if you（ will come） to my party?when you （com please tell me if he will come是什么从句