Verbseoul.
regular
잃어버리다ileobeoridato lose

To say to lose politely in the present tense, use 잃어버려요 (ee-ruh-buh-ryuh-yoh). Below is the full conjugation of 잃어버리다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
잃어버려
ee-ruh-buh-ryuh
잃어버려요
ee-ruh-buh-ryuh-yoh
잃어버립니다
ee-ruh-buh-reem-nee-dah
Past
잃어버렸어
ee-ruh-buh-ryuh-ssuh
잃어버렸어요
ee-ruh-buh-ryuh-ssuh-yoh
잃어버렸습니다
ee-ruh-buh-ryuh-sseum-nee-dah
Future
잃어버릴 거야
ee-ruh-buh-reel- -guh-yah
잃어버릴 거예요
ee-ruh-buh-reel- -guh-yae-yoh
잃어버릴 겁니다
ee-ruh-buh-reel- -guhm-nee-dah

Other useful forms

Command Polite (세요)
잃어버리세요
ee-ruh-buh-ree-sae-yoh
Suggestion / Let's Polite (요)
잃어버려요
ee-ruh-buh-ryuh-yoh
Question Polite (요)
잃어버려요?
ee-ruh-buh-ryuh-yoh-?
Connective “and” — (고)
잃어버리고
ee-ruh-buh-ree-goh
Conditional “if” — (면)
잃어버리면
ee-ruh-buh-ree-myuhn
Noun form — (기)
잃어버림
ee-ruh-buh-reem