когда я вырасту, я хочу быть

when I grow up, I want to be

→ когда
phrase Rare #35,974
when I grow up, I want to be Used to talk about a hoped-for future profession or the kind of person someone wants to become. The phrase is followed by a profession in the instrumental case, such as пожарным (a firefighter) or учителем (a teacher).
RU: Когда я вырасту, я хочу быть врачом.
EN: When I grow up, I want to be a doctor.