Verbseoul.
하다 verb (adj)
공정하다gongjeonghadajust, fair

To say just, fair politely in the present tense, use 공정해요 (gohng-chuhng-hae-yoh). Below is the full conjugation of 공정하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
공정해
gohng-chuhng-hae
공정해요
gohng-chuhng-hae-yoh
공정합니다
gohng-chuhng-hahm-nee-dah
Past
공정했어
gohng-chuhng-hae-ssuh
공정했어요
gohng-chuhng-hae-ssuh-yoh
공정했습니다
gohng-chuhng-hae-sseum-nee-dah
Future
공정할 거야
gohng-chuhng-hahl- -guh-yah
공정할 거예요
gohng-chuhng-hahl- -guh-yae-yoh
공정할 겁니다
gohng-chuhng-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
공정하세요
gohng-chuhng-hah-sae-yoh
Suggestion / Let's Polite (요)
공정해요
gohng-chuhng-hae-yoh
Question Polite (요)
공정해요?
gohng-chuhng-hae-yoh-?
Connective “and” — (고)
공정하고
gohng-chuhng-hah-goh
Conditional “if” — (면)
공정하면
gohng-chuhng-hah-myuhn
Noun form — (기)
공정함
gohng-chuhng-hahm