Verbseoul.
하다 verb

처신하다 conjugation (cheosinhada, to behave, to conduct oneself)

To say to behave, to conduct oneself politely in the present tense, use 처신해요 (chuh-sheen-hae-yoh) · cheosinhaeyo. Below is the full conjugation of 처신하다 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
처신해
chuh-sheen-hae
cheosinhae
처신해요
chuh-sheen-hae-yoh
cheosinhaeyo
처신합니다
chuh-sheen-hahm-nee-dah
cheosinhamnida
Past
처신했어
chuh-sheen-hae-ssuh
cheosinhaesseo
처신했어요
chuh-sheen-hae-ssuh-yoh
cheosinhaesseoyo
처신했습니다
chuh-sheen-hae-sseum-nee-dah
cheosinhaesseumnida
Future
처신할 거야
chuh-sheen-hahl guh-yah
cheosinhal geoya
처신할 거예요
chuh-sheen-hahl guh-yae-yoh
cheosinhal geoyeyo
처신할 겁니다
chuh-sheen-hahl guhm-nee-dah
cheosinhal geomnida

Other useful forms

Honorific / Command Polite (-(으)세요)
처신하세요
chuh-sheen-hah-sae-yoh
cheosinhaseyo
Suggestion / Let's Polite (요)
처신해요
chuh-sheen-hae-yoh
cheosinhaeyo
Question Polite (요)
처신해요?
chuh-sheen-hae-yoh-?
cheosinhaeyo?
Connective "and" — (고)
처신하고
chuh-sheen-hah-goh
cheosinhago
Conditional "if" — (면)
처신하면
chuh-sheen-hah-myuhn
cheosinhamyeon
Progressive (고 있어요)
처신하고 있어요
chuh-sheen-hah-goh ee-ssuh-yoh
cheosinhago isseoyo
Want to (고 싶어요)
처신하고 싶어요
chuh-sheen-hah-goh shee-puh-yoh
cheosinhago sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
처신할 수 있어요
chuh-sheen-hahl soo ee-ssuh-yoh
cheosinhal su isseoyo
Because / So (아/어서)
처신해서
chuh-sheen-hae-suh
cheosinhaeseo
Noun form — (기)
처신하기
chuh-sheen-hah-gee
cheosinhagi
Noun form — (음)
처신함
chuh-sheen-hahm
cheosinham