할 지

whether to

→ 하다
phrase Uncommon #11,586
whether to In standard Korean spelling, this is usually written 할지 without a space when it means “whether to do something.” The spaced form 할 지 may appear informally or as a learner’s spacing. Do not confuse it with 한 지, which is written with a space and means “since doing something,” as in 기도 안 한 지 한참 됐어요 (“It’s been a long time since I prayed”).
KO: 나는 누구를 믿어야 할 지 모른다.
EN: I don’t know whom I should trust.

나는 누구를 믿어야 할 지 모른다.

I don't know who to trust.

어떻게 할 지 말해줘요

Please tell me what to do.

— 좋은 친구들 (1990)