你这句话或许打错了吧 boy后面应该是is把，单数第三人称;要不就是boy是复数 改过来是： 1.The boy is playing football.2.The boys are playing football. 特殊疑问句：what is the boy doing? 一般疑问句：is the boy playing football? 2.The boys are playing football. 特殊疑问句：what are the boy doing? 一般疑问句：Are the boy playing football? 不知道你看动了没？