Verbseoul.
하다 verb
동거하다donggeohadato cohabit, to live together

To say to cohabit, to live together politely in the present tense, use 동거해요 (dohng-guh-hae-yoh). Below is the full conjugation of 동거하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
동거해
dohng-guh-hae
동거해요
dohng-guh-hae-yoh
동거합니다
dohng-guh-hahm-nee-dah
Past
동거했어
dohng-guh-hae-ssuh
동거했어요
dohng-guh-hae-ssuh-yoh
동거했습니다
dohng-guh-hae-sseum-nee-dah
Future
동거할 거야
dohng-guh-hahl- -guh-yah
동거할 거예요
dohng-guh-hahl- -guh-yae-yoh
동거할 겁니다
dohng-guh-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
동거하세요
dohng-guh-hah-sae-yoh
Suggestion / Let's Polite (요)
동거해요
dohng-guh-hae-yoh
Question Polite (요)
동거해요?
dohng-guh-hae-yoh-?
Connective “and” — (고)
동거하고
dohng-guh-hah-goh
Conditional “if” — (면)
동거하면
dohng-guh-hah-myuhn
Noun form — (기)
동거함
dohng-guh-hahm