Verbseoul.
하다 verb (adj)
오목하다omokhadato be concave

To say to be concave politely in the present tense, use 오목해요 (oh-moh-kae-yoh). Below is the full conjugation of 오목하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
오목해
oh-moh-kae
오목해요
oh-moh-kae-yoh
오목합니다
oh-moh-kahm-nee-dah
Past
오목했어
oh-moh-kae-ssuh
오목했어요
oh-moh-kae-ssuh-yoh
오목했습니다
oh-moh-kae-sseum-nee-dah
Future
오목할 거야
oh-moh-kahl- -guh-yah
오목할 거예요
oh-moh-kahl- -guh-yae-yoh
오목할 겁니다
oh-moh-kahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
오목하세요
oh-moh-kah-sae-yoh
Suggestion / Let's Polite (요)
오목해요
oh-moh-kae-yoh
Question Polite (요)
오목해요?
oh-moh-kae-yoh-?
Connective “and” — (고)
오목하고
oh-moh-kah-goh
Conditional “if” — (면)
오목하면
oh-moh-kah-myuhn
Noun form — (기)
오목함
oh-moh-kahm