Verbseoul.
하다 verb
불륜하다bulryunhadato have an affair

To say to have an affair politely in the present tense, use 불륜해요 (bool-ryoon-hae-yoh). Below is the full conjugation of 불륜하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
불륜해
bool-ryoon-hae
불륜해요
bool-ryoon-hae-yoh
불륜합니다
bool-ryoon-hahm-nee-dah
Past
불륜했어
bool-ryoon-hae-ssuh
불륜했어요
bool-ryoon-hae-ssuh-yoh
불륜했습니다
bool-ryoon-hae-sseum-nee-dah
Future
불륜할 거야
bool-ryoon-hahl- -guh-yah
불륜할 거예요
bool-ryoon-hahl- -guh-yae-yoh
불륜할 겁니다
bool-ryoon-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
불륜하세요
bool-ryoon-hah-sae-yoh
Suggestion / Let's Polite (요)
불륜해요
bool-ryoon-hae-yoh
Question Polite (요)
불륜해요?
bool-ryoon-hae-yoh-?
Connective “and” — (고)
불륜하고
bool-ryoon-hah-goh
Conditional “if” — (면)
불륜하면
bool-ryoon-hah-myuhn
Noun form — (기)
불륜함
bool-ryoon-hahm