Wat is this?谁会改（改为复数形式）

Wat is this?谁会改（改为复数形式） How much is it?谁会改（改为复数形式） This is my shirt.改为复数句怎么改 This is his pencil-box.改为复数句子怎么改? is,this,adOII?改为复数句,怎么改? is this a car?改为复数形式怎么改? This is a backpack(改为复数句子)怎么改? This is an English book(改为复数句）怎么改 This is a pair of socks 改为复数句子 怎么改 将Is this that twin sister's photo改为复数形式怎么改? this is an orange改复数句 this is my cousin 改复数句子 this is an eraser 改复数 This dress is mine改复数句 This is a garden改复数 this is my knife改复数句 this is a ruler.改复数 This is my sister.改为复数形式、