Verbseoul.
regular
안되다andoedato fail, to not do/go well

To say to fail, to not do/go well politely in the present tense, use 안돼요 (ahn-dwae-yoh). Below is the full conjugation of 안되다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
안돼
ahn-dwae
안돼요
ahn-dwae-yoh
안됩니다
ahn-dwaem-nee-dah
Past
안됐어
ahn-dwae-ssuh
안됐어요
ahn-dwae-ssuh-yoh
안됐습니다
ahn-dwae-sseum-nee-dah
Future
안될 거야
ahn-dwael- -guh-yah
안될 거예요
ahn-dwael- -guh-yae-yoh
안될 겁니다
ahn-dwael- -guhm-nee-dah

Other useful forms

Command Polite (세요)
안되세요
ahn-dwae-sae-yoh
Suggestion / Let's Polite (요)
안돼요
ahn-dwae-yoh
Question Polite (요)
안돼요?
ahn-dwae-yoh-?
Connective “and” — (고)
안되고
ahn-dwae-goh
Conditional “if” — (면)
안되면
ahn-dwae-myuhn
Noun form — (기)
안됨
ahn-dwaem