is,this,adOII?改为复数句,怎么改?

is,this,adOII?改为复数句,怎么改? This is my shirt.改为复数句怎么改 This is a backpack(改为复数句子)怎么改? This is his pencil-box.改为复数句子怎么改? is this a car?改为复数形式怎么改? my birthday is in april改为复数句怎么改? He is a man teacher改为复数句怎么改? this is an apple怎么改为复数句 This is your red coat.改为同义句,怎么改? This is an apple 改为否定句,怎么改? This is my teacher.(改为否定句）怎么改? This dress is mine改复数句