How do you say what are doing in English?

There are a few ways to say "what are you doing" in English, depending on the context and formality:

Informal:

* Whatcha doin'? (very casual)

* What are you up to?

* What's going on?

* Busy? (Implies you are asking if they have time to talk)

Formal:

* What are you working on? (If it's a work context)

* What are you doing at the moment?

* May I ask what you are doing? (More polite and formal)

To ask about a specific task:

* What are you doing with that? (If they are holding something)

* What are you working on now? (If they are working on a project)

Choose the phrase that best suits your situation and the level of formality you want to convey.