be good at加名詞,介詞賓格或名詞性短語,很重要的就是如接動(dòng)詞要加動(dòng)詞的ing形式.

　　如I am good at teaching English.I am good at football.

　　be good at后面要接名詞、動(dòng)名詞或名詞/動(dòng)名詞短語，

　　例句：

　　John is good at swimming and basketball.

　　約翰擅長游泳和籃球。

　　It is important that we try to be good at everything we do.

　　重要的是我們要盡力做好我們所做的每一件事。

　　I have a shrill voice. I'll never be good at singing.

　　我聲音尖利。我永遠(yuǎn)不會(huì)擅長唱歌。

　　I am good at chess, but not checkers.

　　我擅長象棋，但不擅長跳棋。