this is your bag ,I think.错在哪里

this is your bag ,I think.错在哪里 Is this your book No __(I) is in my bag Is this your bag 和 this Is your bag哪个正确,有什么差别?是否通用? I t___ this bag is Lily's. is this your bag?与is this bag yours?有什么区别 This is your family photo . M ( )is in my bag. This is your bag.和 Here's your bag.有什么区别? OK.< >Is this your bag?< >里填英语 Is this your bag?是什么时态请各位马上回答 Is this hers bag? this black bag is this is my bag. Where is your bag? Is your bag 一般疑问句中,如,is this your bag 和is it your bag 谁对,还是都对为什么 i am sure that your bag is smaller than____(me) Is this your bag No,mine is light .but this one is_____. Is ths your bag?“怎么回答?可以用This is my bag吗?为什么?我主要是问可以用This is my bag吗？