Formal:
* "Eppadi irukkinga?" (எப்படி இருக்கீங்க?) - This is used for addressing someone older or in a position of authority, similar to "How are you?"
* "Eppadi irukkingir?" (எப்படி இருக்கீங்க?) - This is also a formal way to ask "how are you" and is used when talking to someone older or in a position of authority.
Informal:
* "Eppadi irukku?" (எப்படி இருக்கு?) - This is used for friends, family, and people you know well. It's similar to "How are you?"
* "Eppadi irukka?" (எப்படி இருக்க?) - This is also an informal way to ask "how are you".
Other phrases that might be considered "how do you" depending on the context:
* "Saariyaa irukka?" (சாரிவா இருக்கா?) - This translates to "Are you okay?", and can be used in the sense of "How are you doing?".
* "Naalaike eppadi?" (நாளைக்கு எப்படி?) - This means "How about tomorrow?", but can be used in the sense of "How are you doing tomorrow?".
It's important to note that the best way to ask "how do you" in Tamil depends on the specific situation and the person you are speaking to. Using the appropriate level of formality is important in Tamil culture.