개선해
gae-suhn-hae
gaeseonhae
개선하다
To say to improve, to ameliorate politely in the present tense, use 개선해요 (gae-suhn-hae-yoh) · gaeseonhaeyo. Below is the full conjugation of 개선하다 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 | 개선해요 gae-suhn-hae-yoh gaeseonhaeyo | 개선합니다 gae-suhn-hahm-nee-dah gaeseonhamnida | |
| Past | 개선했어 gae-suhn-hae-ssuh gaeseonhaesseo | 개선했어요 gae-suhn-hae-ssuh-yoh gaeseonhaesseoyo | 개선했습니다 gae-suhn-hae-sseum-nee-dah gaeseonhaesseumnida |
| Future | 개선할 거야 gae-suhn-hahl guh-yah gaeseonhal geoya | 개선할 거예요 gae-suhn-hahl guh-yae-yoh gaeseonhal geoyeyo | 개선할 겁니다 gae-suhn-hahl guhm-nee-dah gaeseonhal geomnida |
Other useful forms
Honorific / Command Polite (-(으)세요)
개선하세요
gae-suhn-hah-sae-yoh
gaeseonhaseyo
Suggestion / Let's Polite (요)
개선해요
gae-suhn-hae-yoh
gaeseonhaeyo
Question Polite (요)
개선해요?
gae-suhn-hae-yoh-?
gaeseonhaeyo?
Connective "and" — (고)
개선하고
gae-suhn-hah-goh
gaeseonhago
Conditional "if" — (면)
개선하면
gae-suhn-hah-myuhn
gaeseonhamyeon
Progressive (고 있어요)
개선하고 있어요
gae-suhn-hah-goh ee-ssuh-yoh
gaeseonhago isseoyo
Want to (고 싶어요)
개선하고 싶어요
gae-suhn-hah-goh shee-puh-yoh
gaeseonhago sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
개선할 수 있어요
gae-suhn-hahl soo ee-ssuh-yoh
gaeseonhal su isseoyo
Because / So (아/어서)
개선해서
gae-suhn-hae-suh
gaeseonhaeseo
Noun form — (기)
개선하기
gae-suhn-hah-gee
gaeseonhagi
Noun form — (음)
개선함
gae-suhn-hahm
gaeseonham