Can John ( )(play) the piano. play要加s吗

来源：学生作业帮编辑：神马作文网作业帮分类：英语作业时间：2024/11/11 00:27:47

不加,can后跟动词原形
再问：若没有can就+s，对吗
再答：等一下，你这句是问句吧？最后应该是个问号吧…… 如果是的话，没有can，那这句句子就是一般现在时引导的一般疑问句，要改成Does John play the piano? play 仍然不要加s，但是can要改成does 如果不是问句，这句话的can不能放在句首。
再问： Is John ( )(play) the piano?这就要加ing,可以加s吗
再答： is/am/are 后跟动词的ing形式，表示现在进行时。所以这里要改成Is John playing the piano? s还是不加
再问：那什么时候才加

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