That is an eraser.变否定句、 一般疑问句RT还有肯定回答

This is an eraser That is aThis is an eraserThat is a plate变复数句 this is an eraser 变复数.快 That is an eraser.变否定句、 一般疑问句RT还有肯定回答 Is that an eraser?的回答 Is that an egg?变复数 Is it a pen?做否定回答 Those are eraser.变单数 These are English books.变单数 this is an eraser in English变特殊疑问句 It is an eraser. It is an eraser? That is ( ) eraser. 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 that( )eraser?--yes,it,s( )eraser. This is a pen and that’s an eraser.可不可以写成This is a pen and that is an eraser.呢? This is an eraser 对an eraser 提问 what is on the table?回答what is on the table?A It's an eraser B They're eraser C That's an eraser D The eraser 选哪个 为什么?如何理解提问主语? Is that your eraser?(改为同义句）Is----------eraser-----------? that's an eraser改为复数句 That is my eraser.对my eraser提问 this is an eraser 改复数