Verbseoul.
하다 verb

경악하다 conjugation (gyeongakhada, to become astonished)

To say to become astonished politely in the present tense, use 경악해요 (gyuhng-ah-kae-yoh) · gyeongakaeyo. Below is the full conjugation of 경악하다 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
경악해
gyuhng-ah-kae
gyeongakae
경악해요
gyuhng-ah-kae-yoh
gyeongakaeyo
경악합니다
gyuhng-ah-kahm-nee-dah
gyeongakamnida
Past
경악했어
gyuhng-ah-kae-ssuh
gyeongakaesseo
경악했어요
gyuhng-ah-kae-ssuh-yoh
gyeongakaesseoyo
경악했습니다
gyuhng-ah-kae-sseum-nee-dah
gyeongakaesseumnida
Future
경악할 거야
gyuhng-ah-kahl guh-yah
gyeongakal geoya
경악할 거예요
gyuhng-ah-kahl guh-yae-yoh
gyeongakal geoyeyo
경악할 겁니다
gyuhng-ah-kahl guhm-nee-dah
gyeongakal geomnida

Other useful forms

Honorific / Command Polite (-(으)세요)
경악하세요
gyuhng-ah-kah-sae-yoh
gyeongakaseyo
Suggestion / Let's Polite (요)
경악해요
gyuhng-ah-kae-yoh
gyeongakaeyo
Question Polite (요)
경악해요?
gyuhng-ah-kae-yoh-?
gyeongakaeyo?
Connective "and" — (고)
경악하고
gyuhng-ah-kah-goh
gyeongakago
Conditional "if" — (면)
경악하면
gyuhng-ah-kah-myuhn
gyeongakamyeon
Progressive (고 있어요)
경악하고 있어요
gyuhng-ah-kah-goh ee-ssuh-yoh
gyeongakago isseoyo
Want to (고 싶어요)
경악하고 싶어요
gyuhng-ah-kah-goh shee-puh-yoh
gyeongakago sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
경악할 수 있어요
gyuhng-ah-kahl soo ee-ssuh-yoh
gyeongakal su isseoyo
Because / So (아/어서)
경악해서
gyuhng-ah-kae-suh
gyeongakaeseo
Noun form — (기)
경악하기
gyuhng-ah-kah-gee
gyeongakagi
Noun form — (음)
경악함
gyuhng-ah-kahm
gyeongakam