His mother found him _______ inventing different kinds of things.
问题描述：
His mother found him _______ inventing different kinds of things.
A.good with B.being good at C.to be well in D.good at
已知答案是D,但不明白为何选D.希望有高人可以给出选D的详细原因.
答
这到题应用的不是found sb do sth 这个短语
首先be good at 是系表结构的短语,但是found 接宾补时要把be动词去掉因此要说found him good at
另外found sb加adj时,也要直接加而不要be动词（原因和上面一样）