be good at后面加什么形式?

　　be good at加名词,介词宾格或名词性短语,很重要的就是如接动词要加动词的ing形式.

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

　　be good at后面要接名词、动名词或名词/动名词短语，

　　例句：

　　John is good at swimming and basketball.

　　约翰擅长游泳和篮球。

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

　　重要的是我们要尽力做好我们所做的每一件事。

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

　　我声音尖利。我永远不会擅长唱歌。

　　I am good at chess, but not checkers.

　　我擅长象棋，但不擅长跳棋。