Verbseoul.
하다 verb (adj)

흔하다 conjugation (heunhada, to be frequent, to be common)

To say to be frequent, to be common politely in the present tense, use 흔해요 (heun-hae-yoh) · heunhaeyo. Below is the full conjugation of 흔하다 across the three tenses and three everyday speech levels.

Grammar note (하다 verb (adj)): 하다 adjectives use the same verb 하다 as a suffix to turn descriptive nouns into predicates (행복하다 = to be happy). They conjugate identically to 하다 verbs: the 하 contracts before -아/-어 suffixes to give 해. 행복해요, 행복했어요, 행복합니다. See all 하다 verbs →

Conjugation table

pron. = pronunciation guide  · RR = Revised Romanization

Highlighted = where the stem changes

TenseCasual (반말)Polite (요)Formal (합니다)
Present
흔해
heun-hae
heunhae
흔해요
heun-hae-yoh
heunhaeyo
흔합니다
heun-hahm-nee-dah
heunhamnida
Past
흔했어
heun-hae-ssuh
heunhaesseo
흔했어요
heun-hae-ssuh-yoh
heunhaesseoyo
흔했습니다
heun-hae-sseum-nee-dah
heunhaesseumnida
Future
흔할 거야
heun-hahl guh-yah
heunhal geoya
흔할 거예요
heun-hahl guh-yae-yoh
heunhal geoyeyo
흔할 겁니다
heun-hahl guhm-nee-dah
heunhal geomnida

Other useful forms

Honorific / Command Polite (-(으)세요)
흔하세요
heun-hah-sae-yoh
heunhaseyo
Suggestion / Let's Polite (요)
흔해요
heun-hae-yoh
heunhaeyo
Question Polite (요)
흔해요?
heun-hae-yoh-?
heunhaeyo?
Connective "and" — (고)
흔하고
heun-hah-goh
heunhago
Conditional "if" — (면)
흔하면
heun-hah-myuhn
heunhamyeon
Progressive (고 있어요)
흔하고 있어요
heun-hah-goh ee-ssuh-yoh
heunhago isseoyo
Want to (고 싶어요)
흔하고 싶어요
heun-hah-goh shee-puh-yoh
heunhago sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
흔할 수 있어요
heun-hahl soo ee-ssuh-yoh
heunhal su isseoyo
Because / So (아/어서)
흔해서
heun-hae-suh
heunhaeseo
Noun form — (기)
흔하기
heun-hah-gee
heunhagi
Noun form — (음)
흔함
heun-hahm
heunham