be good at后面加動(dòng)詞時(shí)是動(dòng)詞的ing形式，be good at還可以加介詞賓格或名詞性短語。be good at意為“擅長……”，表示“擅長于某一學(xué)科知識(shí)或技能”，也可表示“在……方面做得好。

be good at后面的動(dòng)詞是什么形式

be good at加名詞，介詞賓格或名詞性短語，非常重要的便是如接動(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.

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

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

I am good at chess， but not checkers.

be good at的用法及例句

1、be good at后面加動(dòng)詞ing形式，例如：You have to be good at spotting trouble on the way and heading it off.你必須善于發(fā)現(xiàn)路上的問題并加以解決；

2、be good at加名詞，介詞賓格或名詞性短語，例如：I am good at football.我擅長足球；

3、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.John擅長游泳和籃球。

be good at的反義詞，表示“不擅長…… "或 在某方面做得不好”，be bad/poor at……；do badly in……；be weak in……；例句：He is bad at drawing.他不擅長畫畫。He is weak in English.他不擅長英語。