are here???

So, we need to specify who you are going to talk this words, "where are you going" at first. 1) It can be translated with several different suffixes depending on the person who you talk to. (1) To person who is younger than, close to And socially ranked lower than you : You, in general, use any of following three and there are more with slightly different suffixes. 어디 가? / 어디 가니? / 어디 가는 거니? Eo-Di Ga? Eo-Di Ga-Ni? Eo-Di Ga-Neun Geo-Ni? [Pronounciation Guide] eo(어) : it sounds similar to the vowel of the first syllable of hUrry. i (이) : it soundssimilar the last vowel of destinY. a (아) : it sounds similar to the first syllable of Apple which is pronounced by an English person. eu(으) : this sound doesn't exist in English but sounds similar to U but not the same. g (ㄱ) : this consonant in Korean is not exactly same as G in English. When it is the first consonant of a word, it sounds similar to K rather than G but not exactly same. Korean people think they pronounce it as G but, to foreigners, it sounds similar to K because it is pronounced as a voiceless sound. This is one of typical features of Korean consonants which foreingers shoul pay attention to. (2) To person who is elder than, not close to OR socially ranked higher than you : You, in general, use any of following three and there are more with slightly different suffixes. 어디 가세요? / 어디 가시나요? / 어디 가시는 거에요? Eo-Di Ga-Se-Yo? Eo-Di Ga-Si-Na-Yo Eo-Di Ga-Si-Neun Geo-E-Yo? [Pronounciation Guide] e (에) : it sound similar to the first vowel of Error. Yo(요) : it sounds similar to the first syllable of yoga

[Following answer is a part of my explanation that I gave to one of my friends when she asked me similiar questions] Unlike Enlish and other languages from similar origins, Ural Altai languages such as Korean, Turkish, Mogolian and Japanese all commonly have a typical way to express tense, question and respectfull attitude by means of adding suffixes right after the root of verbs. For example, In English you can say "Where are you going?" to any family members, friends, teachers, neighbors and so on regardless of their ages, whether he is your husband, in-law, or your son. However in Korean, when a listener is older than, ranked higher than, or not close enough to a speaker, the speaker should add appropriate suffixes to show some respectful attitude while speaking.

simply just eodi ga? or if you want a more formal way eodi gayo?

Where are you going ? 어디가노 ? o di ga no ?