켜다([kyeo-da/turn on]) means to turn on a light, machine, heater, or AC. In polite speech, say 켜요([kyeo-yo]) or 켭니다([kyeom-ni-da]). Opposite is 끄다([kkeu-da/turn off]).
켰어요([kyeo-sseo-yo/turned on]) is the polite past form. Example: 불을 켰어요 (I turned on the light) - past action completed. Very common at work.
켜지 마세요([kyeo-ji ma-se-yo/don't turn on]) is the polite negative imperative. Example: 아직 켜지 마세요 → 켜지 마세요([kyeo-ji ma-se-yo/don't turn on]) - important for safety: don't turn on the machine yet.
켜다([kyeo-da/turn on]) means "to turn on" - to turn on a light, machine, heater, AC, TV. Opposite of 끄다([kkeu-da/turn off]). Essential factory verb.
1. Basic: “불을 켜요 (bu-reul kyeo-yo)” I turn on the light
2. Past: 켰어요([kyeo-sseo-yo/turned on]) - 에어컨을 켰어요
3. Negative: 켜지 마세요([kyeo-ji ma-se-yo/don't turn on]) - 고장나서 켜지 마세요.
4. Obligation: 켜야 해요([kyeo-ya hae-yo/have to turn on]) - 8시에 켜야 해요.
A: Do you turn on the light?
B: 네, 불을 켜요. B: ne, bu-reul kyeo-yo.B: Yes, I turn on the light. - 켜다([kyeo-da/turn on])
A: Did you turn it on?
B: 네, 켰어요. B: ne, kyeo-sseo-yo.B: Yes, I turned it on.
A: 무엇을 켰어요? A: mu-eo-seul kyeo-sseo-yo?A: What did you turn on?
B: 에어컨을 켰어요. B: e-eo-keo-neul kyeo-sseo-yo.B: I turned on the air conditioner. - 켰어요([kyeo-sseo-yo/turned on])
A: Can I turn on the machine?
B: 아니요, 켜지 마세요. B: a-ni-yo, kyeo-ji ma-se-yo.B: No, please don't turn it on.
A: 왜요? A: wae-yo?A: Why?
B: 고장났어요. B: go-jang-na-sseo-yo.B: It's broken. - 켜지 마세요([kyeo-ji ma-se-yo/don't turn on])
• 켜다([kyeo-da/turn on]) turn on
- 켰어요([kyeo-sseo-yo/turned on]) turned on
- 켜고 싶어요([kyeo-go si-peo-yo/want to turn on]) want to turn on
- 켜야 해요([kyeo-ya hae-yo/have to turn on]) have to turn on
- 켜지 마세요([kyeo-ji ma-se-yo/don't turn on]) don't turn on