Verbseoul.
하다 verb
성교하다seonggyohadato have sex, to make love, to copulate

To say to have sex, to make love, to copulate politely in the present tense, use 성교해요 (suhng-gyoh-hae-yoh). Below is the full conjugation of 성교하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
성교해
suhng-gyoh-hae
성교해요
suhng-gyoh-hae-yoh
성교합니다
suhng-gyoh-hahm-nee-dah
Past
성교했어
suhng-gyoh-hae-ssuh
성교했어요
suhng-gyoh-hae-ssuh-yoh
성교했습니다
suhng-gyoh-hae-sseum-nee-dah
Future
성교할 거야
suhng-gyoh-hahl- -guh-yah
성교할 거예요
suhng-gyoh-hahl- -guh-yae-yoh
성교할 겁니다
suhng-gyoh-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
성교하세요
suhng-gyoh-hah-sae-yoh
Suggestion / Let's Polite (요)
성교해요
suhng-gyoh-hae-yoh
Question Polite (요)
성교해요?
suhng-gyoh-hae-yoh-?
Connective “and” — (고)
성교하고
suhng-gyoh-hah-goh
Conditional “if” — (면)
성교하면
suhng-gyoh-hah-myuhn
Noun form — (기)
성교함
suhng-gyoh-hahm