KOREAN VERB

끓이다

to boil

Conjugation

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현재 · now and habits: polite, formal and casual speech

Form	Polite	Formal	Casual
AffirmativeI boil
NegativeI don’t boil

과거 · finished actions: 갔어요, 갔습니다, 갔어

Form	Polite	Formal	Casual
AffirmativeI boiled
NegativeI didn’t boil

미래 · plans and guesses: -(으)ㄹ 거예요

Form	Polite	Formal	Casual
AffirmativeI will boil
NegativeI won’t boil

높임말 · to or about an elder: the -시- forms

Form	Polite	Formal
PresentI boil (respectfully)
PastI boiled (respectfully)
FutureI will boil (respectfully)

연결 어미 · and, so, if, because, but: joining two sentences

명령형 · -(으)세요, -(으)십시오, the casual form, -지 마세요

One sentence for each tense, the way people say it.

Present

저는 밤에 자주 라면을 끓여요.

I often make ramyeon at night.
Past

감기에 걸려서 따뜻한 생강차를 끓였어요.

I caught a cold, so I boiled some warm ginger tea.
Future

손님이 오면 미역국을 끓일 거예요.

When guests come, I'll make seaweed soup.
Honorific

할머니가 아침 일찍 된장국을 끓이셨어요.

Grandma made doenjang soup early in the morning.
Connectives

먼저 물을 끓이고 면을 넣으세요.

First boil the water, then put in the noodles.
Requests and commands

물을 삼 분만 더 끓이세요.

Boil the water just three more minutes.

끓이다 is to boil something, and to make a soup or a stew (물을 끓이다, 라면을 끓이다); 끓다 is water boiling by itself.

The same pattern, on other verbs: verb.