공사해
gohng-sah-hae
gongsahae
공사하다
To say to do construction work politely in the present tense, use 공사해요 (gohng-sah-hae-yoh) · gongsahaeyo. Below is the full conjugation of 공사하다 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
| Tense | Casual (반말) | Polite (요) | Formal (합니다) |
|---|---|---|---|
| Present | 공사해요 gohng-sah-hae-yoh gongsahaeyo | 공사합니다 gohng-sah-hahm-nee-dah gongsahamnida | |
| Past | 공사했어 gohng-sah-hae-ssuh gongsahaesseo | 공사했어요 gohng-sah-hae-ssuh-yoh gongsahaesseoyo | 공사했습니다 gohng-sah-hae-sseum-nee-dah gongsahaesseumnida |
| Future | 공사할 거야 gohng-sah-hahl guh-yah gongsahal geoya | 공사할 거예요 gohng-sah-hahl guh-yae-yoh gongsahal geoyeyo | 공사할 겁니다 gohng-sah-hahl guhm-nee-dah gongsahal geomnida |
Other useful forms
Honorific / Command Polite (-(으)세요)
공사하세요
gohng-sah-hah-sae-yoh
gongsahaseyo
Suggestion / Let's Polite (요)
공사해요
gohng-sah-hae-yoh
gongsahaeyo
Question Polite (요)
공사해요?
gohng-sah-hae-yoh-?
gongsahaeyo?
Connective "and" — (고)
공사하고
gohng-sah-hah-goh
gongsahago
Conditional "if" — (면)
공사하면
gohng-sah-hah-myuhn
gongsahamyeon
Progressive (고 있어요)
공사하고 있어요
gohng-sah-hah-goh ee-ssuh-yoh
gongsahago isseoyo
Want to (고 싶어요)
공사하고 싶어요
gohng-sah-hah-goh shee-puh-yoh
gongsahago sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
공사할 수 있어요
gohng-sah-hahl soo ee-ssuh-yoh
gongsahal su isseoyo
Because / So (아/어서)
공사해서
gohng-sah-hae-suh
gongsahaeseo
Noun form — (기)
공사하기
gohng-sah-hah-gee
gongsahagi
Noun form — (음)
공사함
gohng-sah-hahm
gongsaham