"What are you going to do tonight?" 是询问对方明天晚上要做什么的常用句型。
来源：这个句型是由助动词"are"，主语"you"，动词"going to"和动词原形"do"组成的。 "Are"表示复数主语的现在时， "going to"表示将要做某事， "do"是一般现在时的动词。
例句:
What are you going to do tonight? 你今晚要干什么？
I'm going to watch a movie. 我要看电影。
She is going to have dinner with her friends. 她要和朋友吃饭。
We are going to have a party at my house. 我们要在我家开派对。