Verbseoul.
하다 verb
다짐하다dajimhadato promise, to resolve, to make a resolution

To say to promise, to resolve, to make a resolution politely in the present tense, use 다짐해요 (dah-cheem-hae-yoh). Below is the full conjugation of 다짐하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
다짐해
dah-cheem-hae
다짐해요
dah-cheem-hae-yoh
다짐합니다
dah-cheem-hahm-nee-dah
Past
다짐했어
dah-cheem-hae-ssuh
다짐했어요
dah-cheem-hae-ssuh-yoh
다짐했습니다
dah-cheem-hae-sseum-nee-dah
Future
다짐할 거야
dah-cheem-hahl- -guh-yah
다짐할 거예요
dah-cheem-hahl- -guh-yae-yoh
다짐할 겁니다
dah-cheem-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
다짐하세요
dah-cheem-hah-sae-yoh
Suggestion / Let's Polite (요)
다짐해요
dah-cheem-hae-yoh
Question Polite (요)
다짐해요?
dah-cheem-hae-yoh-?
Connective “and” — (고)
다짐하고
dah-cheem-hah-goh
Conditional “if” — (면)
다짐하면
dah-cheem-hah-myuhn
Noun form — (기)
다짐함
dah-cheem-hahm