Verbseoul.
하다 verb

참여하다 conjugation (chamyeohada, to participate)

To say to participate politely in the present tense, use 참여해요 (chah-myuh-hae-yoh) · chamyeohaeyo. Below is the full conjugation of 참여하다 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
참여해
chah-myuh-hae
chamyeohae
참여해요
chah-myuh-hae-yoh
chamyeohaeyo
참여합니다
chah-myuh-hahm-nee-dah
chamyeohamnida
Past
참여했어
chah-myuh-hae-ssuh
chamyeohaesseo
참여했어요
chah-myuh-hae-ssuh-yoh
chamyeohaesseoyo
참여했습니다
chah-myuh-hae-sseum-nee-dah
chamyeohaesseumnida
Future
참여할 거야
chah-myuh-hahl guh-yah
chamyeohal geoya
참여할 거예요
chah-myuh-hahl guh-yae-yoh
chamyeohal geoyeyo
참여할 겁니다
chah-myuh-hahl guhm-nee-dah
chamyeohal geomnida

Other useful forms

Honorific / Command Polite (-(으)세요)
참여하세요
chah-myuh-hah-sae-yoh
chamyeohaseyo
Suggestion / Let's Polite (요)
참여해요
chah-myuh-hae-yoh
chamyeohaeyo
Question Polite (요)
참여해요?
chah-myuh-hae-yoh-?
chamyeohaeyo?
Connective "and" — (고)
참여하고
chah-myuh-hah-goh
chamyeohago
Conditional "if" — (면)
참여하면
chah-myuh-hah-myuhn
chamyeohamyeon
Progressive (고 있어요)
참여하고 있어요
chah-myuh-hah-goh ee-ssuh-yoh
chamyeohago isseoyo
Want to (고 싶어요)
참여하고 싶어요
chah-myuh-hah-goh shee-puh-yoh
chamyeohago sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
참여할 수 있어요
chah-myuh-hahl soo ee-ssuh-yoh
chamyeohal su isseoyo
Because / So (아/어서)
참여해서
chah-myuh-hae-suh
chamyeohaeseo
Noun form — (기)
참여하기
chah-myuh-hah-gee
chamyeohagi
Noun form — (음)
참여함
chah-myuh-hahm
chamyeoham