Verbseoul.
하다 verb

전환하다 conjugation (jeonhwanhada, to change, to switch, to transform)

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

Grammar note (하다 verb): 하다 verbs are formed with a Sino-Korean noun + 하다 (e.g. 공부하다 = study + do). 하다 conjugates irregularly: the ㅏ in 하 contracts with the -아/-어 suffix to give 해 (not *하어). Present polite: 해요; past polite: 했어요. The formal ending is 합니다 (not *하습니다). Most noun+하다 compounds follow this pattern uniformly. See all 하다 verbs →

Conjugation table

pron. = pronunciation guide  · RR = Revised Romanization

Highlighted = where the stem changes

TenseCasual (반말)Polite (요)Formal (합니다)
Present
전환해
chuhn-hwahn-hae
jeonhwanhae
전환해요
chuhn-hwahn-hae-yoh
jeonhwanhaeyo
전환합니다
chuhn-hwahn-hahm-nee-dah
jeonhwanhamnida
Past
전환했어
chuhn-hwahn-hae-ssuh
jeonhwanhaesseo
전환했어요
chuhn-hwahn-hae-ssuh-yoh
jeonhwanhaesseoyo
전환했습니다
chuhn-hwahn-hae-sseum-nee-dah
jeonhwanhaesseumnida
Future
전환할 거야
chuhn-hwahn-hahl guh-yah
jeonhwanhal geoya
전환할 거예요
chuhn-hwahn-hahl guh-yae-yoh
jeonhwanhal geoyeyo
전환할 겁니다
chuhn-hwahn-hahl guhm-nee-dah
jeonhwanhal geomnida

Other useful forms

Honorific / Command Polite (-(으)세요)
전환하세요
chuhn-hwahn-hah-sae-yoh
jeonhwanhaseyo
Suggestion / Let's Polite (요)
전환해요
chuhn-hwahn-hae-yoh
jeonhwanhaeyo
Question Polite (요)
전환해요?
chuhn-hwahn-hae-yoh-?
jeonhwanhaeyo?
Connective "and" — (고)
전환하고
chuhn-hwahn-hah-goh
jeonhwanhago
Conditional "if" — (면)
전환하면
chuhn-hwahn-hah-myuhn
jeonhwanhamyeon
Progressive (고 있어요)
전환하고 있어요
chuhn-hwahn-hah-goh ee-ssuh-yoh
jeonhwanhago isseoyo
Want to (고 싶어요)
전환하고 싶어요
chuhn-hwahn-hah-goh shee-puh-yoh
jeonhwanhago sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
전환할 수 있어요
chuhn-hwahn-hahl soo ee-ssuh-yoh
jeonhwanhal su isseoyo
Because / So (아/어서)
전환해서
chuhn-hwahn-hae-suh
jeonhwanhaeseo
Noun form — (기)
전환하기
chuhn-hwahn-hah-gee
jeonhwanhagi
Noun form — (음)
전환함
chuhn-hwahn-hahm
jeonhwanham