be+good+at后加什么？

be good at加名词、介词宾格或名词性短语；

be good a后跟名词、代词或动词ing形式。意思是 擅长于…

如

I am good at teaching English.

I am good at football等。

.You have to be good at spotting trouble on the way and heading it off.

你必须善于发现潜在的\'麻烦并加以化解。

A teacher should be good at drawing inferences about other cases from one instance.

老师要善于举一反三。

Viruses tend to be good at surviving when a computer system crashes.

计算机病毒在系统崩溃后往往依然存在。

You have to be good at spotting trouble on the way and heading it off.

你必须善于发现潜在的麻烦并加以化解。