Verbseoul.
하다 verb
확정하다hwakjeonghadato decide

To say to decide politely in the present tense, use 확정해요 (hwahg-chuhng-hae-yoh). Below is the full conjugation of 확정하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
확정해
hwahg-chuhng-hae
확정해요
hwahg-chuhng-hae-yoh
확정합니다
hwahg-chuhng-hahm-nee-dah
Past
확정했어
hwahg-chuhng-hae-ssuh
확정했어요
hwahg-chuhng-hae-ssuh-yoh
확정했습니다
hwahg-chuhng-hae-sseum-nee-dah
Future
확정할 거야
hwahg-chuhng-hahl- -guh-yah
확정할 거예요
hwahg-chuhng-hahl- -guh-yae-yoh
확정할 겁니다
hwahg-chuhng-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
확정하세요
hwahg-chuhng-hah-sae-yoh
Suggestion / Let's Polite (요)
확정해요
hwahg-chuhng-hae-yoh
Question Polite (요)
확정해요?
hwahg-chuhng-hae-yoh-?
Connective “and” — (고)
확정하고
hwahg-chuhng-hah-goh
Conditional “if” — (면)
확정하면
hwahg-chuhng-hah-myuhn
Noun form — (기)
확정함
hwahg-chuhng-hahm