His sister has to play the piano after s

His sister has to play the piano after s My+sister+often+play+the+piano+after+supper.为何这里的play不加s大神们帮 He didn't play the piano ------his sister. I used to play the piano after school.(play the piano是对画线部分提 The boy has to stay at home to look after his little sister, Can your sister ____(play)the piano? she’s going to play the piano同意句 The girl has learned to play the piano,but she can play a co 英语,简单 he goes to the music club to ( ) play the piano after 几个英语问题1.I"m going to learn to play the piano after I retire- After ten minutes his sister came outside and began to play 关于英语问题He has to look after his sister.怎么改成否定句?别长篇大论!