What is it 改为复数形式

What is it 改为复数形式 英语句的复数形式What is this?It is a desk.改为复数形式 whose coat is it?改为复数形式, is it a bus改为复数形式 Here it is.改为复数形式 It is my pen.(改为复数形式) It is a dictionary改为复数形式 It is a watch.(改为复数形式) It is a photo.(改为复数形式) 改为复数形式 Is that an English book?What"s this in English?It is what color is it?的复数形式 What is it?It is a leaf 改为复数句