I will have to check what is on when I go to Dalian.“what is on”是固定搭配“什么是对的”吗?

问题描述:

I will have to check what is on when I go to Dalian.“what is on”是固定搭配“什么是对的”吗?
在别的句子中也可以把what is on 当词组来用吗?

翻译:当我去大连的时候,我会去查看发生了什么.
what is on 是比较口语的表达,意思是“发生了什么,上演了什么?”
例句:
How about going to the theatre to see what is on tonight?
我们要不要去戏院看看今天晚上演什么?