KOREAN VERB

켜다

to turn on

Conjugation

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

Form	Polite	Formal	Casual
AffirmativeI turn on
NegativeI don’t turn on

과거 · finished actions: 갔어요, 갔습니다, 갔어

Form	Polite	Formal	Casual
AffirmativeI turned on
NegativeI didn’t turn on

미래 · plans and guesses: -(으)ㄹ 거예요

Form	Polite	Formal	Casual
AffirmativeI will turn on
NegativeI won’t turn on

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

Form	Polite	Formal
PresentI turn on (respectfully)
PastI turned on (respectfully)
FutureI will turn on (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

집에 오면 제일 먼저 불을 켜요.

When I get home, the first thing I do is turn on the light.
Past

밤에 너무 더워서 에어컨을 켰어요.

It was so hot at night that I turned on the air conditioner.
Future

어두워지면 거실 불을 켤 거예요.

When it gets dark, I'll turn on the living-room light.
Honorific

할아버지는 아침마다 라디오를 먼저 켜세요.

Grandpa turns on the radio first thing every morning.
Connectives

컴퓨터를 켜고 이메일을 먼저 확인했어요.

I turned on the computer and checked my email first.
Requests and commands

추우면 거실 난방을 먼저 켜세요.

If you're cold, turn on the living-room heating first.

The same pattern, on other verbs: verb.