1.this is a bus（改为复数句子）

Is this a bus （改为复数句 This is a bus.改为复数. 1.this is a bus（改为复数句子） This is a bus.改为复数形式的句子 this is a bus.把它改为复数句 This is a bus 改为单数或则复数 this bus is very big. 改为复数 is it a bus改为复数形式 --What is this?--It is a bus.改为复数是什么?0.0 this is a bus.【变为复数句】 This is a book 改为复数句 This is a pear.改为复数句 this is a book改为复数形式 This is a dress.改为复数形式 this is a tree 改为复数句 this is a shirt改为复数句 this is a strawberry改为复数 This is a young tree.(改为复数)