Who give it to you?为什么不加did

Who give it to you?为什么不加did 为什么这个句子是Whom did you give the book to?而不是Who did you give th Can you help him find it为什么不加to could you give me a ride downtown为什么不加to Who did you speak to? ---who_____ --one of my friend did A did give it to you B ga To＿did you give the book?A.who B.whose C.which D.whom Whom did you give the book to?中Whom可不可以换为Who I'd give it to charity 为什么charity不加the 或加a 或变复数呢 Give him my best regards疑问,为什么不加to? it's nice of you to give me a ticket to the film,句子中为什么用of而不 Who did you think it might be?