하다 conjugation (hada, to do)

Example sentences

• casual present지금 뭐 해?What are you doing right now?
• polite present저는 매일 아침에 운동을 해요.I exercise every morning.
• formal present저는 은행에서 일을 합니다.I work at a bank.
• casual past숙제 다 했어?Have you finished your homework?
• polite past어제 친구랑 게임을 했어요.I played games with a friend yesterday.
• formal past오늘 회의에서 중요한 발표를 했습니다.I gave an important presentation at today’s meeting.
• casual future주말에 집 청소를 할 거야.I’m going to clean the house this weekend.
• polite future내일부터 다이어트를 할 거예요.I’m starting a diet tomorrow.
• formal future오후에 회의를 할 겁니다.We will hold a meeting in the afternoon.
• honorific -(으)세요숙제를 먼저 하세요.Do your homework first, please.

How it’s used

하다 turns hundreds of nouns into verbs, such as 공부하다 (to study), 운동하다 (to exercise) and 사랑하다 (to love), and they all conjugate exactly like 하다. With these nouns you can attach 하다 directly (운동해요) or add the object particle (운동을 해요); both are correct. It also turns many nouns and roots into descriptive verbs, as in 깨끗하다 (to be clean) and 피곤하다 (to be tired).

Common mistake

Applying the regular -아/어 rule and writing 하아요 or 하요. 하 always becomes 해 before these endings: 해요, 했어요, 해서. You may see the old form 하여 in formal writing, but in speech it is always 해.