Is it a bus?的复数句

Is it a bus?的复数句 is it a bus改为复数形式 this is a bus.【变为复数句】 Is this a bus （改为复数句 that is a bus.(变为复数句）that is a bus.(变为复数句） It's a new bus.改为复数句 this is a bus.把它改为复数句 Is that a bus?(改为复数句） It is a yellow leaf 的复数句急 it is a strawberry 改为复数句 it is a mouse改为复数句 It is a watch.变为复数句 It is a calf(改复数句) It is a photo (改为复数句) It is a watch.变成复数句 英语句的复数形式What is this?It is a desk.改为复数形式 What is it?It is a leaf 改为复数句 This is a bus.改为复数形式的句子