Verbseoul.
하다 verb
도사하다dosahadato die in vain

To say to die in vain politely in the present tense, use 도사해요 (doh-sah-hae-yoh). Below is the full conjugation of 도사하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
도사해
doh-sah-hae
도사해요
doh-sah-hae-yoh
도사합니다
doh-sah-hahm-nee-dah
Past
도사했어
doh-sah-hae-ssuh
도사했어요
doh-sah-hae-ssuh-yoh
도사했습니다
doh-sah-hae-sseum-nee-dah
Future
도사할 거야
doh-sah-hahl- -guh-yah
도사할 거예요
doh-sah-hahl- -guh-yae-yoh
도사할 겁니다
doh-sah-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
도사하세요
doh-sah-hah-sae-yoh
Suggestion / Let's Polite (요)
도사해요
doh-sah-hae-yoh
Question Polite (요)
도사해요?
doh-sah-hae-yoh-?
Connective “and” — (고)
도사하고
doh-sah-hah-goh
Conditional “if” — (면)
도사하면
doh-sah-hah-myuhn
Noun form — (기)
도사함
doh-sah-hahm