First of all koreans don't use 내, when korean people introduce their family or group member. Because korean culture is based on Confucianism, the value of 'us' is highly emphasized. 내 아버지가 오셨어 (x) / 내 아버지 왔어 (x) / 내 아버지 왔셨어 (x) > There is nothing like 왔셨어 in Korean. 우리 아버지께서 오셨어. / (우리) 아버지께서 오셨어 (o) Also when you talking about your family member, who's age is older than you, you have to use polite form. 이분은 저의 엄마이세요 (x) 이분은 제 어머니세요. (o) 셔요 and 세요 are both correct. But ~셔요 is dead word. Back in the 80's koreans use that word but it's replaced with ~세요 선생님, 어디 가셔요?* (no longer used) 선생님, 어디 가세요? (o)