Verbseoul.
하다 verb
변이하다byeonihadachange

To say change politely in the present tense, use 변이해요 (byuh-nee-hae-yoh). Below is the full conjugation of 변이하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
변이해
byuh-nee-hae
변이해요
byuh-nee-hae-yoh
변이합니다
byuh-nee-hahm-nee-dah
Past
변이했어
byuh-nee-hae-ssuh
변이했어요
byuh-nee-hae-ssuh-yoh
변이했습니다
byuh-nee-hae-sseum-nee-dah
Future
변이할 거야
byuh-nee-hahl- -guh-yah
변이할 거예요
byuh-nee-hahl- -guh-yae-yoh
변이할 겁니다
byuh-nee-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
변이하세요
byuh-nee-hah-sae-yoh
Suggestion / Let's Polite (요)
변이해요
byuh-nee-hae-yoh
Question Polite (요)
변이해요?
byuh-nee-hae-yoh-?
Connective “and” — (고)
변이하고
byuh-nee-hah-goh
Conditional “if” — (면)
변이하면
byuh-nee-hah-myuhn
Noun form — (기)
변이함
byuh-nee-hahm