I have an new eraser.哪里错了

I have an new eraser.哪里错了 there have a pencil and an eraser in the pencil-case.哪里错了? I have an eraser 对an eraser提问 I have a eraser 这句话错在哪里? I have an eraser改为特殊疑问句 I have an eraser同义句 i have an eraser.改为否定句 I have an eraser in my hand.改为同意句 Many I have an eraser?的同义句 This’s an eraser and that's a card.改错误 哪里错了?并改正. May I have look your new sweater?中哪里错了? I know you have a new pen.Please show me it这句话哪里错了