John,are these books----(your)

John,are these books----(your) Are they your books?还是Are these your books?为什么? these are (they)books.those are (your) are these your books?改为单数形式 These are your books.变一般疑问句 Are these your books?肯定回答 Are these your books?作否定回答 Are these your books?的否定回答 These are------------ your books中间是什么 These are your books.(改为单数) These are her books.These books are 英语中是用"Are these your a red books"还是用"Are these your the red