Verbseoul.
ㅎ irregular (adj)
가맣다gamatdato be blackish

To say to be blackish politely in the present tense, use 가매요 (gah-mae-yoh). Below is the full conjugation of 가맣다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
가매
gah-mae
가매요
gah-mae-yoh
가맣습니다
gah-mah-sseum-nee-dah
Past
가맸어
gah-mae-ssuh
가맸어요
gah-mae-ssuh-yoh
가맸습니다
gah-mae-sseum-nee-dah
Future
가말 거야
gah-mahl- -guh-yah
가말 거예요
gah-mahl- -guh-yae-yoh
가말 겁니다
gah-mahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
가마세요
gah-mah-sae-yoh
Suggestion / Let's Polite (요)
가매요
gah-mae-yoh
Question Polite (요)
가매요?
gah-mae-yoh-?
Connective “and” — (고)
가맣고
gah-mah-koh
Conditional “if” — (면)
가마면
gah-mah-myuhn
Noun form — (기)
가맘
gah-mahm