i _play the piano at the age of sixi 后面是填can 还是could ,be able to

i _play the piano at the age of sixi 后面是填can 还是could ,be able to perform at the piano 改错：I am good at play the piano. i'm good at play the piano.改否定 直接改间接 Mary said I am good at playing the piano Mary said that ()() good at planging the piano I'm good at playing the piano.(否定句） I_____ ______ good at playing the piano. wich sentence is correct i am good at play the piano .and i am good at the piano如标题 ..那个正确..为什么 when i was a t__,i was good at playing the piano I often play the piano. I can play the piano. 将I started playing the piano at the ago of eight改为同义句I started playing the piano ______ ______ _______ eight 填三空 连词成句“at,usually,the,8：00,piano,I,play (.)中文是什么？ 连词成句I usually 8:00 play piano at the I like the piano还是I like piano Are you 什么 good at the piano? -----Do you play the piano at home,John?-----No,( )I can't play the piano.选项见问题补充)A.never B.always C.sometimes D.usually The twins are good at playing the piano.The twins ___ ___ in playing the piano. I can ()play the piano a （）.