하는지 알아

know what … is doing

→ 하다
phrase Common #1,913
know what … is doing Used in questions meaning “do you know what … is doing/saying?” The subject and the specific action are usually understood from context.
KO: 너 지금 뭐 하는지 알아?
EN: Do you know what you're doing right now?

네 아빠 병원 가는 날 뭐 하는지 알아?

Do you know what your dad does on the day he goes to the hospital?

— 로렌스 애니웨이 (2012)