Are these your books?的回答能不能用
Yes,these are./No,these aren't.
--------不可以。可回答:Yes, they are.\No, they aren't。一般来说,可直接回答:they are!表示肯定。
Is this your book?的回答能不能用
Yes,this is./No,this isn't. ------不可以。应为,Yes,it is.\No,it isn't.因为说话的双方都是知道是指的那本书,在这种情况下用it.
Whose is it? 在日常口语中经常用到。whose book is it?在这里是特别强调了这本书。
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