this is a box.变复数句___________?
this is a box.变复数句___________?
单数句变复数句This is a box.This is a bus.Tt is a ruler.This isn't
this is knife in the box(变复数句
This is a box.(改为复数句)
This is a box.改为复数形式
this is a box改为复数
Is this a pen?(变复数句)
This is a pen变为复数句,怎么变
This is a horse.变该句为复数形式
This is a box and that is a knife (改为复数句)
There is an apple in the box.变复数句
This is a box and that is a knife.改为复数形式〔怎么变的〕