I can play the guitar(该否定句)

I can play the guitar and the piano否定句 I can play the guitar and the drum改为否定句 mary can play the guitar改为否定句 He can play the guitar.(否定句） she can play the guitar 改为否定句 I can play the guitar well 怎么提问the guitar I can play the guitar.改为疑问句 I think they can play the guitar. he can play the guitar and the violin,改否定句 My father can play the guitar very well.(改为否定句) My father can play the guitar very well.（改为否定句） can the girl play the guitar?（作否定回答）