Verbseoul.
하다 verb
전환하다jeonhwanhadato change, to switch, to transform

To say to change, to switch, to transform politely in the present tense, use 전환해요 (chuhn-hwahn-hae-yoh). Below is the full conjugation of 전환하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
전환해
chuhn-hwahn-hae
전환해요
chuhn-hwahn-hae-yoh
전환합니다
chuhn-hwahn-hahm-nee-dah
Past
전환했어
chuhn-hwahn-hae-ssuh
전환했어요
chuhn-hwahn-hae-ssuh-yoh
전환했습니다
chuhn-hwahn-hae-sseum-nee-dah
Future
전환할 거야
chuhn-hwahn-hahl- -guh-yah
전환할 거예요
chuhn-hwahn-hahl- -guh-yae-yoh
전환할 겁니다
chuhn-hwahn-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
전환하세요
chuhn-hwahn-hah-sae-yoh
Suggestion / Let's Polite (요)
전환해요
chuhn-hwahn-hae-yoh
Question Polite (요)
전환해요?
chuhn-hwahn-hae-yoh-?
Connective “and” — (고)
전환하고
chuhn-hwahn-hah-goh
Conditional “if” — (면)
전환하면
chuhn-hwahn-hah-myuhn
Noun form — (기)
전환함
chuhn-hwahn-hahm