keompyuteo jeonwoneul kkeosseoyo.

I turned off the computer’s power.

Breakdown of keompyuteo jeonwoneul kkeosseoyo.

• ~을: object particle
• 컴퓨터: computer
• 전원: power
• 끄다: to turn off

Questions & Answers about keompyuteo jeonwoneul kkeosseoyo.

What does each part of the sentence do?

• 컴퓨터: “computer,” a noun modifying the next noun (acts like “computer’s”).
• 전원: “power (supply)” of a device.
• 을: object marker attached to 전원 → 전원을.
• 껐어요: past polite form of 끄다 “to turn off.” Overall: “(I) turned off the computer’s power.”

Where is the subject “I”?

Korean often drops obvious subjects. “I” is understood from context. If you want to include it:

• 저는 컴퓨터 전원을 껐어요. (topic/neutral)
• 제가 컴퓨터 전원을 껐어요. (I, specifically/contrastive)

Why say 컴퓨터 전원을 껐어요 instead of 컴퓨터를 껐어요? Are both okay?

• 컴퓨터 전원을 껐어요 literally targets the power; it sounds a bit more technical/precise.
• 컴퓨터를 껐어요 is the everyday way to say “I turned off the computer.”
• In casual speech they’re often interchangeable; in IT or instructions, 전원 is common.

Why no 의 between 컴퓨터 and 전원?

In speech, Koreans usually drop 의 in N + N possessive compounds. 컴퓨터 전원 is natural. 컴퓨터의 전원 is correct but sounds formal or written.

How does 끄다 become 껐어요? Is that irregular?

• 끄다 is ㅡ-irregular.
• Polite present: 꺼요 (ㅡ drops and combines with 어요).
• Past: 껐어요 = 꺼 + 었어요 → contracts to 껐어요.
• Not 끄었어요.

How do you pronounce the sentence naturally?

• 컴퓨터: roughly “kum-pyu-tuh.”
• 전원을: roughly “juh-nwuh-neul” (the ㄴ often starts the next syllable: [저눠늘]).
• 껐어요: “kkeo-sseo-yo,” with tense kk and double s: [꺼써요]. Together: “kum-pyu-tuh juh-nwuh-neul kkeo-sseo-yo.”

What’s the difference between 끄다 and 꺼지다?

• 끄다: transitive “to turn off (something)” → takes an object: 전원을 껐어요.
• 꺼지다: intransitive “to go out/be turned off” → 전원이 꺼졌어요 (“the power went off”).
• On the flip side: 켜다 (turn on) vs 켜지다 (become on).

Is 꺼다 a verb?

No. 꺼 is a conjugated form of 끄다 with -어. Use:

• Dictionary: 끄다
• Request: 꺼 주세요 (“please turn it off”), not “꺼다.”

What politeness level is 껐어요, and what are alternatives?

• 껐어요: polite informal (해요체).
• Alternatives:
  • Casual: 껐어.
  • Formal polite: 껐습니다.
  • Plain/written: 껐다.

How do I say “I didn’t turn it off”?

• 안 껐어요. (colloquial)
• 끄지 않았어요. (slightly more formal/emphatic) With the object: 컴퓨터 전원을 안 껐어요 / 끄지 않았어요.

How do I make a polite request or command?

• Polite request: 전원을 꺼 주세요. / 전원 좀 꺼 주시겠어요?
• Polite command: 전원을 끄세요.
• Casual: 전원 꺼.

Can I change the word order?

• Default: [Subject] 컴퓨터 전원을 껐어요.
• You can front the object for emphasis/contrast: 컴퓨터 전원을 저는 껐어요.
• The verb still stays at the end.

Any useful collocations or near-synonyms?

• 전원을 켜다/끄다: turn power on/off.
• 컴퓨터를 종료하다: shut down the computer (software/OS action).
• 재부팅하다 / 다시 켜다: reboot / turn on again.
• 전원 버튼: power button.

Does 전원 ever mean something else?

Yes. 전원 can also mean “countryside” (田園), but with 컴퓨터 it clearly means “power” (電源).

Why is it 전원+을 and not 전원+를? Can I drop the object marker?

• Use 을 after a consonant-final noun (전원 ends in ㄴ) → 전원을.
• Use 를 after a vowel-final noun (e.g., 컴퓨터를).
• In casual speech the object marker may be dropped if clear: 컴퓨터 전원 껐어요. Keeping it is safer/standard, especially in writing.