单数句变复数句This is a box.This is a bus.Tt is a ruler.This isn't

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单数句变复数句
This is a box.This is a bus.Tt is a ruler.
This isn't a book.That isn't an apple.It isn't a desk.
复数句变单数句
Thoy are erasers.Thoy aren't orages.These are cakes.
Those are eggs.Are they pens?
写出答语（肯定否定回答)
ARE you fine?Is Tom a student?Is this a toy?
Is that a book?Are these desks?Is it a car?

现在小孩真简单.
单数句变复数句
These are boxes.These are buses.These are rulers.
These are not books.Those are not apples.They are not desks.
复数句变单数句
It is an eraser.It is an orange.It is a cake.
That is an egg.Is it a pen?
写出答语（肯定否定回答)
ARE you fine?肯定 Yes,I am,否定 no,I am not
Is Tom a student?肯定 yes,he is,否定 no,he is not
Is this a toy?肯定 yes,it is.否定 no,it isn't
Is that a book?肯定 yes,it is.否定 no,it is not
Are these desks?肯定 yes,they are 否定 no,they are not
Is it a car?肯定 yes,it is.否定 no,it isn't

单数句变复数句This is a box.This is a bus.Tt is a ruler.This isn't this is a box.变复数句___________? this is a bus.【变为复数句】 Is this a bus （改为复数句 is,a,this,red,ruler 连成句改成复数句This is a book.That isn't an egg.Is this a book?Yes,is This is a box.(改为复数句） This is "a ruler". this is a bus.把它改为复数句 this is a ruler.改复数 this is a ruler 改为复数 This is a bus 改为单数或则复数