Is this his eraser 把这句单数句变成复数句

Is this his eraser 把这句单数句变成复数句 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 把下面句子改成陈述句这是作业急Is this your pencil?Is this my pen?Is that his books?Is that her eraser? This is his pencil case改为一般否定句 This is my eraser 改为否定句 This is his pencil case改为一般否定句 This is my eraser 改为否定句 把下面四个句子班委否定句和疑问句：This is my backpack.That is her dictionary.It’s his eraser. 是This eraser is mine还是This eraser is my? I guess this is eraser. this is eraser的意思 This is ( )eraser. ( )eraser is in the pencil case . This is an eraser 对an eraser 提问 This is my eraser. Is that_____(you) That is his eraser改为一般疑问句 is that his eraser咋回答 英语句子改成疑问句并回答1 this is my eraser.2that is his pencil sharpener This is my eraser 改为一般疑问句. this is an eraser 改复数 Is this your eraser怎么回答