Is that youe eraser?作否定句回答

Is that youe eraser?作否定句回答 Is that her eraser?作肯定回答 That is her eraser改为否定句 is that helen is pencil（作否定回答） a white eraser（对它提问） is this Is that my eraser?(作肯定回答） That is an eraser.变否定句、 一般疑问句 that's my cousin's eraser改为一般疑问句并作否定回答 Is that ID card.作否定回答 Is that your pen?作否定回答 is that the library?作否定回答 this is tom is eraser.变成一般疑问句并作否定回答 is it eraser?做否定回答