Verbseoul.
하다 verb

협박하다 conjugation (hyeopbakhada, to threaten, to menace)

To say to threaten, to menace politely in the present tense, use 협박해요 (hyuhp-bah-kae-yoh) · hyeopbakaeyo. Below is the full conjugation of 협박하다 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
협박해
hyuhp-bah-kae
hyeopbakae
협박해요
hyuhp-bah-kae-yoh
hyeopbakaeyo
협박합니다
hyuhp-bah-kahm-nee-dah
hyeopbakamnida
Past
협박했어
hyuhp-bah-kae-ssuh
hyeopbakaesseo
협박했어요
hyuhp-bah-kae-ssuh-yoh
hyeopbakaesseoyo
협박했습니다
hyuhp-bah-kae-sseum-nee-dah
hyeopbakaesseumnida
Future
협박할 거야
hyuhp-bah-kahl guh-yah
hyeopbakal geoya
협박할 거예요
hyuhp-bah-kahl guh-yae-yoh
hyeopbakal geoyeyo
협박할 겁니다
hyuhp-bah-kahl guhm-nee-dah
hyeopbakal geomnida

Other useful forms

Honorific / Command Polite (-(으)세요)
협박하세요
hyuhp-bah-kah-sae-yoh
hyeopbakaseyo
Suggestion / Let's Polite (요)
협박해요
hyuhp-bah-kae-yoh
hyeopbakaeyo
Question Polite (요)
협박해요?
hyuhp-bah-kae-yoh-?
hyeopbakaeyo?
Connective "and" — (고)
협박하고
hyuhp-bah-kah-goh
hyeopbakago
Conditional "if" — (면)
협박하면
hyuhp-bah-kah-myuhn
hyeopbakamyeon
Progressive (고 있어요)
협박하고 있어요
hyuhp-bah-kah-goh ee-ssuh-yoh
hyeopbakago isseoyo
Want to (고 싶어요)
협박하고 싶어요
hyuhp-bah-kah-goh shee-puh-yoh
hyeopbakago sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
협박할 수 있어요
hyuhp-bah-kahl soo ee-ssuh-yoh
hyeopbakal su isseoyo
Because / So (아/어서)
협박해서
hyuhp-bah-kae-suh
hyeopbakaeseo
Noun form — (기)
협박하기
hyuhp-bah-kah-gee
hyeopbakagi
Noun form — (음)
협박함
hyuhp-bah-kahm
hyeopbakam