That is a pen.(变为复数)

That is a pen.(变为复数) that is a pen (变为复数） This is a pen 变为复数如题 This is a pen变为复数句,怎么变 there is a pen on the desk 变为复数 that is a bus.(变为复数句）that is a bus.(变为复数句） What is that?itis a pen改为复数形式 that is a pen that is his pen变复数句 is that his pen?改为复数 That is my brother.(变为复数句) lt is a nThat is my brother.(变为复数句) lt is a nice picture.(变为复数句) This is a pen and that is a knife改为复数形式 This is an apple.that is a pen.改复数形式 That shirt is White变为复数句 Is that his sister?变为复数句 this is a pen.改为复数句 This is a pen.(改为复数形式) There isn't afootball field in my school变为复数That is a basketball court 变为复数