What is (someone) (doing)?

You ask "What are you (doing)?" to find out about someone's planned (future) actions. Asking in this way makes it sound like you think the listener already has a specific plan.

For example:

What are you doing tonight?

You can also ask other questions, like "Where are you...?", "How are you...?", "When are you...?", and so on.

A: I'm going out for a little while.
B: Where are you going?

In this example, Person B thinks that Person A already knows where they're going to go so Person B asks "Where are you..."

This phrase appears in these lessons: