Verbseoul.
하다 verb
청혼하다cheonghonhadato propose

To say to propose politely in the present tense, use 청혼해요 (chuhng-hohn-hae-yoh). Below is the full conjugation of 청혼하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
청혼해
chuhng-hohn-hae
청혼해요
chuhng-hohn-hae-yoh
청혼합니다
chuhng-hohn-hahm-nee-dah
Past
청혼했어
chuhng-hohn-hae-ssuh
청혼했어요
chuhng-hohn-hae-ssuh-yoh
청혼했습니다
chuhng-hohn-hae-sseum-nee-dah
Future
청혼할 거야
chuhng-hohn-hahl- -guh-yah
청혼할 거예요
chuhng-hohn-hahl- -guh-yae-yoh
청혼할 겁니다
chuhng-hohn-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
청혼하세요
chuhng-hohn-hah-sae-yoh
Suggestion / Let's Polite (요)
청혼해요
chuhng-hohn-hae-yoh
Question Polite (요)
청혼해요?
chuhng-hohn-hae-yoh-?
Connective “and” — (고)
청혼하고
chuhng-hohn-hah-goh
Conditional “if” — (면)
청혼하면
chuhng-hohn-hah-myuhn
Noun form — (기)
청혼함
chuhng-hohn-hahm