Formal:
* நீங்கள் எங்கே இருக்கிறீர்கள்? (nēṅkaḷ eṅka ē irukkirīrkaḷ?) - This is the most formal way to ask "where are you?". It uses the plural respectful pronoun "nēṅkaḷ" and the polite verb form "irukkirīrkaḷ".
* நீங்கள் எங்கே இருக்கீங்க? (nēṅkaḷ eṅka ē irukkīṅka?) - This is slightly less formal than the previous option, but still respectful. It uses the plural pronoun "nēṅkaḷ" but a shortened form of the verb "irukkirīrkaḷ".
Informal:
* நீ எங்கே இருக்க? (nē eṅka ē irukkā?) - This is the most common way to ask "where are you?" in an informal setting. It uses the singular pronoun "nē" and the informal verb form "irukkā".
* எங்கே இருக்கீங்க? (eṅka ē irukkīṅka?) - This is a more informal way to ask "where are you?" using the plural pronoun "nēṅkaḷ" but a shortened form of the verb "irukkirīrkaḷ". It's suitable for friends or people you know well.
Other phrases:
* எங்க இருக்கீங்க? (eṅka irukkīṅka?) - This is another informal way to say "where are you?" and is commonly used in spoken Tamil.
* எங்க போயிருக்கீங்க? (eṅka pōyirukkīṅka?) - This translates to "where did you go?" and can be used to ask where someone is if you know they were somewhere else.
The best way to choose which phrase to use depends on the context and your relationship with the person you are talking to.