제가 어렸을 때

when I was young

→ 저
phrase Rare #31,801
when I was young 제가 is a polite, humble way to say “I” as the subject.
KO: 제가 어렸을 때는 바닷가에서 자주 놀았어요.
EN: When I was young, I often played by the sea.