~도 이다/그렇다 : too in the positive sentence A:아들이 공부를 하고 있어요. (My son is studying) B:내 아들도 그래요/하고 있어요. (My son is studying too) . ~도 아니다 : Either in the negative sentence A:아들이 공부를 안 해요 (My son doesn't study) B:내 아들도 그래요/안 해요. (My son doesn't study either)
This is a bit confused.. Where are you from? in Korean 어디에서 왔어요? This can be a question for asking Where are you from or Where did you come from? I think if you want to ask the nationality of someone, this would be better way 어느 나라 사람이에요?