될지 모르겠어요

don't know what/how … should

→ 되다

phrase Rare #30,875

don't know what/how … should Often used after 어떻게 해야 or 무슨 … 해야 to say you don't know what or how to do something. It can also mean “don't know whether … will be/become.”

KO: 제가 어떻게 해야 될지 모르겠어요.

EN: I don't know what I should do.

사실 어떻게 해야 될지 모르겠어요

Honestly, I don't know what to do.

— Love Untangled (2025)

저는 아직까지 무슨 소설을 써야 될지 모르겠어요

I still don't know what kind of novel I should write.

— 버닝 (2018)

내가 어떻게 해야 될지 모르겠어요

I don't know what I should do.

— Pavane (2026)