Verbseoul.
하다 verb

실수하다 conjugation (silsuhada, to make a mistake)

To say to make a mistake politely in the present tense, use 실수해요 (sheel-soo-hae-yoh) · silsuhaeyo. Below is the full conjugation of 실수하다 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
실수해
sheel-soo-hae
silsuhae
실수해요
sheel-soo-hae-yoh
silsuhaeyo
실수합니다
sheel-soo-hahm-nee-dah
silsuhamnida
Past
실수했어
sheel-soo-hae-ssuh
silsuhaesseo
실수했어요
sheel-soo-hae-ssuh-yoh
silsuhaesseoyo
실수했습니다
sheel-soo-hae-sseum-nee-dah
silsuhaesseumnida
Future
실수할 거야
sheel-soo-hahl guh-yah
silsuhal geoya
실수할 거예요
sheel-soo-hahl guh-yae-yoh
silsuhal geoyeyo
실수할 겁니다
sheel-soo-hahl guhm-nee-dah
silsuhal geomnida

Other useful forms

Honorific / Command Polite (-(으)세요)
실수하세요
sheel-soo-hah-sae-yoh
silsuhaseyo
Suggestion / Let's Polite (요)
실수해요
sheel-soo-hae-yoh
silsuhaeyo
Question Polite (요)
실수해요?
sheel-soo-hae-yoh-?
silsuhaeyo?
Connective "and" — (고)
실수하고
sheel-soo-hah-goh
silsuhago
Conditional "if" — (면)
실수하면
sheel-soo-hah-myuhn
silsuhamyeon
Progressive (고 있어요)
실수하고 있어요
sheel-soo-hah-goh ee-ssuh-yoh
silsuhago isseoyo
Want to (고 싶어요)
실수하고 싶어요
sheel-soo-hah-goh shee-puh-yoh
silsuhago sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
실수할 수 있어요
sheel-soo-hahl soo ee-ssuh-yoh
silsuhal su isseoyo
Because / So (아/어서)
실수해서
sheel-soo-hae-suh
silsuhaeseo
Noun form — (기)
실수하기
sheel-soo-hah-gee
silsuhagi
Noun form — (음)
실수함
sheel-soo-hahm
silsuham