把Is it an eraser改为复数形式

把Is it an eraser改为复数形式 it is an eraser的复数形式!help It is an eraser .改为否定句 It is an English car.(改为复数形式) It is an Asian wolf.改为复数形式谢谢 It is an old sweater 改为复数形式是? It is an eraser? It is an eraser. he is an engineer.把句子改为复数形式 把IT is Lucy is dictionary改为复数形式 it is an eraser(改为一般疑问句） It is pen复数.和this is an eraser复数.还有he isboy复数