that is a pen (变为复数）

that is a pen (变为复数） That is a pen.(变为复数) that is a bus.(变为复数句）that is a bus.(变为复数句） 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 What is that?itis a pen改为复数形式 that is a pen That is your pen(加her pen变为选择疑问句） That is your pen (加her pen变为选择疑问句） 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 Is this a pen?（变复数句） This is an apple.that is a pen.改复数形式 Is this a car?复数Is this a car?(变为复数） Yes,it is.（变为复数） That shirt is White变为复数句