I'm good at (dancing) ,so I want to join the art club.括号里为啥不填dance而填dancing,dance也做名词用呀

I'm good at singing and dancing.(同义句) I‘m good at singing and dancing.（同义句） I'm good at singing and dancing.Are you good at singing ___dancing?变为一般疑问or 还是 and,为什么？ I'm good at (dancing) ,so I want to join the art club.括号里为啥不填dance而填dancing,dance也做名词用呀 I think she is good at dancing的翻译 I am good at singing and dancing改一般疑问句 I think you are good at dancing是什么意思 I'm ( )good at dancing括号里需不需要填also、too或either，或者不填 L'm good at dancing.(对划线部分提问,划 dancing） i m not good at And I 'm good at Does she good at dancing 病句 luck is good at dancing.同义句 I'm good at nothing什么意思 I'm good at least superficially She is good at singing .She is good at dancing,too.She is good at _____ inging_____ dancing.同 i'm no good at this 为什么不是not good I'm no good at it.与I'm not good at it.的区别.