Verbseoul.
regular
끓이다kkeulidato boil something

To say to boil something politely in the present tense, use 끓여요 (ggeu-ryuh-yoh). Below is the full conjugation of 끓이다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
끓여
ggeu-ryuh
끓여요
ggeu-ryuh-yoh
끓입니다
ggeu-reem-nee-dah
Past
끓였어
ggeu-ryuh-ssuh
끓였어요
ggeu-ryuh-ssuh-yoh
끓였습니다
ggeu-ryuh-sseum-nee-dah
Future
끓일 거야
ggeu-reel- -guh-yah
끓일 거예요
ggeu-reel- -guh-yae-yoh
끓일 겁니다
ggeu-reel- -guhm-nee-dah

Other useful forms

Command Polite (세요)
끓이세요
ggeu-ree-sae-yoh
Suggestion / Let's Polite (요)
끓여요
ggeu-ryuh-yoh
Question Polite (요)
끓여요?
ggeu-ryuh-yoh-?
Connective “and” — (고)
끓이고
ggeu-ree-goh
Conditional “if” — (면)
끓이면
ggeu-ree-myuhn
Noun form — (기)
끓임
ggeu-reem