请某位英语神马帮助!be good at、 be skilled in ,be skilled at,do well i

请某位英语神马帮助!be good at、 be skilled in ,be skilled at,do well i be skilled at or in? to be good at; to be skilled in; to be dead on; to be clever be good at与 do well in do well in与be good at be good at与do well in be good at do well in 造句, be well in和be good at be good at doing sth.be good at=do well in 是不是 do well in do be good at 与 do well in 得区别 be good at和 do well in的分别 Be good at和Do well in的区别.