Verbseoul.
하다 verb
개혁하다gaehyeokhadato reform

To say to reform politely in the present tense, use 개혁해요 (gae-hyuh-kae-yoh). Below is the full conjugation of 개혁하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
개혁해
gae-hyuh-kae
개혁해요
gae-hyuh-kae-yoh
개혁합니다
gae-hyuh-kahm-nee-dah
Past
개혁했어
gae-hyuh-kae-ssuh
개혁했어요
gae-hyuh-kae-ssuh-yoh
개혁했습니다
gae-hyuh-kae-sseum-nee-dah
Future
개혁할 거야
gae-hyuh-kahl- -guh-yah
개혁할 거예요
gae-hyuh-kahl- -guh-yae-yoh
개혁할 겁니다
gae-hyuh-kahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
개혁하세요
gae-hyuh-kah-sae-yoh
Suggestion / Let's Polite (요)
개혁해요
gae-hyuh-kae-yoh
Question Polite (요)
개혁해요?
gae-hyuh-kae-yoh-?
Connective “and” — (고)
개혁하고
gae-hyuh-kah-goh
Conditional “if” — (면)
개혁하면
gae-hyuh-kah-myuhn
Noun form — (기)
개혁함
gae-hyuh-kahm