this is your eraser变成一疑问句并作否定回答

this is an eraser 变复数.快 Is this your eraser怎么回答 is this your eraser的同义句 前面是Is this your eraser is this your eraser?【同义句】 Is this your eraser?(同义句）Is this___ ____? this is an eraser in English变特殊疑问句 Is this your eraser?(作否定回答） is,this,your,eraser,（同义句转换） is this your an eraser?是不是对的， Is this your an eraser?哪错了? Is this your eraser?NO,it is not.Ithink{ }1;it his eraser 2;its his eraser 3;it is his eraser改选哪一个 is that not your eraser?这句话对吗?That isn't your eraser.变一般疑问句is that not your eraser? Is this your eraser?---No,it isn't.I think ___.A.it her eraser B.its her eraser C.it's her eraser This is an eraser That is aThis is an eraserThat is a plate变复数句 This is your eraser.(真是你的尺子.）《该否定句》 --------- --------- your eraser两天之内答出 是This eraser is mine还是This eraser is my? I guess this is eraser.