is the boy your brother做否定回答：No,he isn't.
不明白的再问哟,请及时采纳,多谢!怎么变一般疑问句，做肯定回答和否定回答的方法是什么如果句中有be 动词，一般将be 动词提前到句首如： He is fifteen. - Is he fifteen ? 如果是行为动词就需要助动词 do, does, did 等如： He goes to school by bus. - Does he go to school by bus ? 很多规律哟，三言两语是说不清的哟。youreraser ishers同义句Your eraser is hers. 你的橡皮是她的。 （ 什么意思？）就是这样的Her eraser is yours.