Verbseoul.
하다 verb
변화하다byeonhwahadato change

To say to change politely in the present tense, use 변화해요 (byuhn-hwah-hae-yoh). Below is the full conjugation of 변화하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
변화해
byuhn-hwah-hae
변화해요
byuhn-hwah-hae-yoh
변화합니다
byuhn-hwah-hahm-nee-dah
Past
변화했어
byuhn-hwah-hae-ssuh
변화했어요
byuhn-hwah-hae-ssuh-yoh
변화했습니다
byuhn-hwah-hae-sseum-nee-dah
Future
변화할 거야
byuhn-hwah-hahl- -guh-yah
변화할 거예요
byuhn-hwah-hahl- -guh-yae-yoh
변화할 겁니다
byuhn-hwah-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
변화하세요
byuhn-hwah-hah-sae-yoh
Suggestion / Let's Polite (요)
변화해요
byuhn-hwah-hae-yoh
Question Polite (요)
변화해요?
byuhn-hwah-hae-yoh-?
Connective “and” — (고)
변화하고
byuhn-hwah-hah-goh
Conditional “if” — (면)
변화하면
byuhn-hwah-hah-myuhn
Noun form — (기)
변화함
byuhn-hwah-hahm