Babies grow up very quickly. (X) Babies grow very quickly. (O) "아기들은 아주 빠르게 성장한다." My hair grows up too fast. (X) My hair grows too fast. (O) "내 머리는 너무 빨리 자라." When I grow, I want to be a doctor. (X) When I grow up, I want to be a doctor. (O) "어른이 되면 의사가 되고 싶어요." ▶ grow는 단지 "자라다" "성장하..