Verbseoul.
하다 verb (adj)
정숙하다jeongsukhadachaste

To say chaste politely in the present tense, use 정숙해요 (chuhng-soo-kae-yoh). Below is the full conjugation of 정숙하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
정숙해
chuhng-soo-kae
정숙해요
chuhng-soo-kae-yoh
정숙합니다
chuhng-soo-kahm-nee-dah
Past
정숙했어
chuhng-soo-kae-ssuh
정숙했어요
chuhng-soo-kae-ssuh-yoh
정숙했습니다
chuhng-soo-kae-sseum-nee-dah
Future
정숙할 거야
chuhng-soo-kahl- -guh-yah
정숙할 거예요
chuhng-soo-kahl- -guh-yae-yoh
정숙할 겁니다
chuhng-soo-kahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
정숙하세요
chuhng-soo-kah-sae-yoh
Suggestion / Let's Polite (요)
정숙해요
chuhng-soo-kae-yoh
Question Polite (요)
정숙해요?
chuhng-soo-kae-yoh-?
Connective “and” — (고)
정숙하고
chuhng-soo-kah-goh
Conditional “if” — (면)
정숙하면
chuhng-soo-kah-myuhn
Noun form — (기)
정숙함
chuhng-soo-kahm