일이잖아요

it's ... you know

→ 일
phrase Rare #22,684
it's ... you know 일 can mean work, a job, a matter, or a thing depending on context. The ending -잖아요 emphasizes something the speaker assumes the listener knows or should recognize, often translated as “after all” or “you know.”
KO: 이건 제가 해야 할 일이잖아요.
EN: This is something I have to do, you know.

그게 일 이잖아요!

That's what you have to do!

— 필사의 추적 (1981)

오래전 일 이잖아요

That was a long time ago.

— 그을린 사랑 (2010)