Verbseoul.
하다 verb
개량하다gaeryanghadato improve

To say to improve politely in the present tense, use 개량해요 (gae-ryahng-hae-yoh). Below is the full conjugation of 개량하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
개량해
gae-ryahng-hae
개량해요
gae-ryahng-hae-yoh
개량합니다
gae-ryahng-hahm-nee-dah
Past
개량했어
gae-ryahng-hae-ssuh
개량했어요
gae-ryahng-hae-ssuh-yoh
개량했습니다
gae-ryahng-hae-sseum-nee-dah
Future
개량할 거야
gae-ryahng-hahl- -guh-yah
개량할 거예요
gae-ryahng-hahl- -guh-yae-yoh
개량할 겁니다
gae-ryahng-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
개량하세요
gae-ryahng-hah-sae-yoh
Suggestion / Let's Polite (요)
개량해요
gae-ryahng-hae-yoh
Question Polite (요)
개량해요?
gae-ryahng-hae-yoh-?
Connective “and” — (고)
개량하고
gae-ryahng-hah-goh
Conditional “if” — (면)
개량하면
gae-ryahng-hah-myuhn
Noun form — (기)
개량함
gae-ryahng-hahm