Formal:
* ʻO wai kāu hana nei? (pronounced "o wai kau hana ney") - This is the most literal translation and is considered polite.
* He aha kāu hana nei? (pronounced "he aha kau hana ney") - This is another formal option, meaning "What are you doing?"
Informal:
* ʻAheaha kāu e hana nei? (pronounced "aheaha kau e hana ney") - This is a more casual way to ask.
* Pehea ʻoe? (pronounced "pehea oe") - This is a more general greeting, but it can also mean "How are you?" or "What's up?"
For a specific task:
* He aha kāu e hana nei i kēia manawa? (pronounced "he aha kau e hana ney i keya manawa") - This means "What are you doing right now?"
Remember, the best way to choose which phrase to use depends on the context and your relationship with the person you are speaking to.