问下各位,be good at 后面加doing 还是do

问下各位,be good at 后面加doing 还是do be good at后加什么词? be good at 后接动词用什么形式 be good at后+什么词是不是+ing be good at后加动词什么形式? be good at造句 用be good at be good at 造句 be good at 词性 be good at+什么? Be good at+__ be good at be good at this be good at 和 be good with be good for,be good at, 用be good at造句. be good at 怎么用? be good at 等于什么?