Verbseoul.
하다 verb

야기하다 conjugation (yagihada, to cause)

To say to cause politely in the present tense, use 야기해요 (yah-gee-hae-yoh) · yagihaeyo. Below is the full conjugation of 야기하다 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
야기해
yah-gee-hae
yagihae
야기해요
yah-gee-hae-yoh
yagihaeyo
야기합니다
yah-gee-hahm-nee-dah
yagihamnida
Past
야기했어
yah-gee-hae-ssuh
yagihaesseo
야기했어요
yah-gee-hae-ssuh-yoh
yagihaesseoyo
야기했습니다
yah-gee-hae-sseum-nee-dah
yagihaesseumnida
Future
야기할 거야
yah-gee-hahl guh-yah
yagihal geoya
야기할 거예요
yah-gee-hahl guh-yae-yoh
yagihal geoyeyo
야기할 겁니다
yah-gee-hahl guhm-nee-dah
yagihal geomnida

Other useful forms

Honorific / Command Polite (-(으)세요)
야기하세요
yah-gee-hah-sae-yoh
yagihaseyo
Suggestion / Let's Polite (요)
야기해요
yah-gee-hae-yoh
yagihaeyo
Question Polite (요)
야기해요?
yah-gee-hae-yoh-?
yagihaeyo?
Connective "and" — (고)
야기하고
yah-gee-hah-goh
yagihago
Conditional "if" — (면)
야기하면
yah-gee-hah-myuhn
yagihamyeon
Progressive (고 있어요)
야기하고 있어요
yah-gee-hah-goh ee-ssuh-yoh
yagihago isseoyo
Want to (고 싶어요)
야기하고 싶어요
yah-gee-hah-goh shee-puh-yoh
yagihago sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
야기할 수 있어요
yah-gee-hahl soo ee-ssuh-yoh
yagihal su isseoyo
Because / So (아/어서)
야기해서
yah-gee-hae-suh
yagihaeseo
Noun form — (기)
야기하기
yah-gee-hah-gee
yagihagi
Noun form — (음)
야기함
yah-gee-hahm
yagiham