Formal:
* Wo yɛn araa wɔyɛ? (Literally: What are you doing yourself?)
* Wo reyɛ dɛn? (What are you doing?)
Informal:
* Wɔyɛ dɛn? (What are you doing?)
* Wo re-yɛ dɛn? (What are you doing?)
More informal, depending on the tone:
* Yɛn araa wɔyɛ? (What are you doing, yourself?)
* Yɛn araa wɔre-yɛ? (What are you doing, yourself?)
* Dɛn na wɔre-yɛ? (What are you doing?)
To ask about someone else's activities:
* Ɔno reyɛ dɛn? (What is he/she doing?)
* Wɔn reyɛ dɛn? (What are they doing?)
It's important to note that the choice of phrase depends on the specific situation and the relationship between the speaker and the listener. Using the more formal phrases is generally considered respectful.
Remember: Twi is a tonal language, meaning the tone of your voice is important. The examples above are just the spelling. You should listen to a native speaker to understand how the tone affects the meaning.