Verbseoul.
하다 verb
구혼하다guhonhadato propose (a marriage)

To say to propose (a marriage) politely in the present tense, use 구혼해요 (goo-hohn-hae-yoh). Below is the full conjugation of 구혼하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
구혼해
goo-hohn-hae
구혼해요
goo-hohn-hae-yoh
구혼합니다
goo-hohn-hahm-nee-dah
Past
구혼했어
goo-hohn-hae-ssuh
구혼했어요
goo-hohn-hae-ssuh-yoh
구혼했습니다
goo-hohn-hae-sseum-nee-dah
Future
구혼할 거야
goo-hohn-hahl- -guh-yah
구혼할 거예요
goo-hohn-hahl- -guh-yae-yoh
구혼할 겁니다
goo-hohn-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
구혼하세요
goo-hohn-hah-sae-yoh
Suggestion / Let's Polite (요)
구혼해요
goo-hohn-hae-yoh
Question Polite (요)
구혼해요?
goo-hohn-hae-yoh-?
Connective “and” — (고)
구혼하고
goo-hohn-hah-goh
Conditional “if” — (면)
구혼하면
goo-hohn-hah-myuhn
Noun form — (기)
구혼함
goo-hohn-hahm