Verbseoul.
하다 verb

섹스하다 conjugation (sekseuhada, to have sex)

To say to have sex politely in the present tense, use 섹스해요 (saeg-sseu-hae-yoh) · seksseuhaeyo. Below is the full conjugation of 섹스하다 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
섹스해
saeg-sseu-hae
seksseuhae
섹스해요
saeg-sseu-hae-yoh
seksseuhaeyo
섹스합니다
saeg-sseu-hahm-nee-dah
seksseuhamnida
Past
섹스했어
saeg-sseu-hae-ssuh
seksseuhaesseo
섹스했어요
saeg-sseu-hae-ssuh-yoh
seksseuhaesseoyo
섹스했습니다
saeg-sseu-hae-sseum-nee-dah
seksseuhaesseumnida
Future
섹스할 거야
saeg-sseu-hahl guh-yah
seksseuhal geoya
섹스할 거예요
saeg-sseu-hahl guh-yae-yoh
seksseuhal geoyeyo
섹스할 겁니다
saeg-sseu-hahl guhm-nee-dah
seksseuhal geomnida

Other useful forms

Honorific / Command Polite (-(으)세요)
섹스하세요
saeg-sseu-hah-sae-yoh
seksseuhaseyo
Suggestion / Let's Polite (요)
섹스해요
saeg-sseu-hae-yoh
seksseuhaeyo
Question Polite (요)
섹스해요?
saeg-sseu-hae-yoh-?
seksseuhaeyo?
Connective "and" — (고)
섹스하고
saeg-sseu-hah-goh
seksseuhago
Conditional "if" — (면)
섹스하면
saeg-sseu-hah-myuhn
seksseuhamyeon
Progressive (고 있어요)
섹스하고 있어요
saeg-sseu-hah-goh ee-ssuh-yoh
seksseuhago isseoyo
Want to (고 싶어요)
섹스하고 싶어요
saeg-sseu-hah-goh shee-puh-yoh
seksseuhago sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
섹스할 수 있어요
saeg-sseu-hahl soo ee-ssuh-yoh
seksseuhal su isseoyo
Because / So (아/어서)
섹스해서
saeg-sseu-hae-suh
seksseuhaeseo
Noun form — (기)
섹스하기
saeg-sseu-hah-gee
seksseuhagi
Noun form — (음)
섹스함
saeg-sseu-hahm
seksseuham