Verbseoul.
regular
개선되다gaeseondoedato improve, to become better

To say to improve, to become better politely in the present tense, use 개선돼요 (gae-suhn-dwae-yoh). Below is the full conjugation of 개선되다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
개선돼
gae-suhn-dwae
개선돼요
gae-suhn-dwae-yoh
개선됩니다
gae-suhn-dwaem-nee-dah
Past
개선됐어
gae-suhn-dwae-ssuh
개선됐어요
gae-suhn-dwae-ssuh-yoh
개선됐습니다
gae-suhn-dwae-sseum-nee-dah
Future
개선될 거야
gae-suhn-dwael- -guh-yah
개선될 거예요
gae-suhn-dwael- -guh-yae-yoh
개선될 겁니다
gae-suhn-dwael- -guhm-nee-dah

Other useful forms

Command Polite (세요)
개선되세요
gae-suhn-dwae-sae-yoh
Suggestion / Let's Polite (요)
개선돼요
gae-suhn-dwae-yoh
Question Polite (요)
개선돼요?
gae-suhn-dwae-yoh-?
Connective “and” — (고)
개선되고
gae-suhn-dwae-goh
Conditional “if” — (면)
개선되면
gae-suhn-dwae-myuhn
Noun form — (기)
개선됨
gae-suhn-dwaem