Verbseoul.
하다 verb
별세하다byeolsehadato die

To say to die politely in the present tense, use 별세해요 (byuhl-sae-hae-yoh). Below is the full conjugation of 별세하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
별세해
byuhl-sae-hae
별세해요
byuhl-sae-hae-yoh
별세합니다
byuhl-sae-hahm-nee-dah
Past
별세했어
byuhl-sae-hae-ssuh
별세했어요
byuhl-sae-hae-ssuh-yoh
별세했습니다
byuhl-sae-hae-sseum-nee-dah
Future
별세할 거야
byuhl-sae-hahl- -guh-yah
별세할 거예요
byuhl-sae-hahl- -guh-yae-yoh
별세할 겁니다
byuhl-sae-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
별세하세요
byuhl-sae-hah-sae-yoh
Suggestion / Let's Polite (요)
별세해요
byuhl-sae-hae-yoh
Question Polite (요)
별세해요?
byuhl-sae-hae-yoh-?
Connective “and” — (고)
별세하고
byuhl-sae-hah-goh
Conditional “if” — (면)
별세하면
byuhl-sae-hah-myuhn
Noun form — (기)
별세함
byuhl-sae-hahm