That is an appie(变复数)怎么变?

That is an appie(变复数)怎么变? This is an eraser That is aThis is an eraserThat is a plate变复数句 that’s an appie .it 's red 的同意句 什么Apple is什么 is this that 变复数怎么变 It's an appie tree(改成复数句) that’s an orange变复数形式 It is an orange,变复数 she is an airhostess.变复数句 this is an eraser 变复数.快 that is a jacket 变复数形式 that is his pen变复数句 That is my grandmother.怎么变复数 that is his room 变复数 That is her dish变复数 whose is that book（变复数） Is that coat blue?变复数 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 That is an English book变成复数