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하다 verb

행하다 conjugation (haenghada, to do)

To say to do politely in the present tense, use 행해요 (haeng-hae-yoh) · haenghaeyo. Below is the full conjugation of 행하다 across the three tenses and three everyday speech levels.

Grammar note (하다 verb): 하다 verbs are formed with a Sino-Korean noun + 하다 (e.g. 공부하다 = study + do). 하다 conjugates irregularly: the ㅏ in 하 contracts with the -아/-어 suffix to give 해 (not *하어). Present polite: 해요; past polite: 했어요. The formal ending is 합니다 (not *하습니다). Most noun+하다 compounds follow this pattern uniformly. See all 하다 verbs →

Conjugation table

pron. = pronunciation guide  · RR = Revised Romanization

Highlighted = where the stem changes

TenseCasual (반말)Polite (요)Formal (합니다)
Present
행해
haeng-hae
haenghae
행해요
haeng-hae-yoh
haenghaeyo
행합니다
haeng-hahm-nee-dah
haenghamnida
Past
행했어
haeng-hae-ssuh
haenghaesseo
행했어요
haeng-hae-ssuh-yoh
haenghaesseoyo
행했습니다
haeng-hae-sseum-nee-dah
haenghaesseumnida
Future
행할 거야
haeng-hahl guh-yah
haenghal geoya
행할 거예요
haeng-hahl guh-yae-yoh
haenghal geoyeyo
행할 겁니다
haeng-hahl guhm-nee-dah
haenghal geomnida

Other useful forms

Honorific / Command Polite (-(으)세요)
행하세요
haeng-hah-sae-yoh
haenghaseyo
Suggestion / Let's Polite (요)
행해요
haeng-hae-yoh
haenghaeyo
Question Polite (요)
행해요?
haeng-hae-yoh-?
haenghaeyo?
Connective "and" — (고)
행하고
haeng-hah-goh
haenghago
Conditional "if" — (면)
행하면
haeng-hah-myuhn
haenghamyeon
Progressive (고 있어요)
행하고 있어요
haeng-hah-goh ee-ssuh-yoh
haenghago isseoyo
Want to (고 싶어요)
행하고 싶어요
haeng-hah-goh shee-puh-yoh
haenghago sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
행할 수 있어요
haeng-hahl soo ee-ssuh-yoh
haenghal su isseoyo
Because / So (아/어서)
행해서
haeng-hae-suh
haenghaeseo
Noun form — (기)
행하기
haeng-hah-gee
haenghagi
Noun form — (음)
행함
haeng-hahm
haengham