Verbseoul.
하다 verb
금하다geumhadato forbid

To say to forbid politely in the present tense, use 금해요 (geum-hae-yoh). Below is the full conjugation of 금하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
금해
geum-hae
금해요
geum-hae-yoh
금합니다
geum-hahm-nee-dah
Past
금했어
geum-hae-ssuh
금했어요
geum-hae-ssuh-yoh
금했습니다
geum-hae-sseum-nee-dah
Future
금할 거야
geum-hahl- -guh-yah
금할 거예요
geum-hahl- -guh-yae-yoh
금할 겁니다
geum-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
금하세요
geum-hah-sae-yoh
Suggestion / Let's Polite (요)
금해요
geum-hae-yoh
Question Polite (요)
금해요?
geum-hae-yoh-?
Connective “and” — (고)
금하고
geum-hah-goh
Conditional “if” — (면)
금하면
geum-hah-myuhn
Noun form — (기)
금함
geum-hahm