English "-ing" is a magpie: it covers a live, moving action ("I'm eating") and a settled, resulting state ("the window is open," "I'm seated," "I'm married"). Because English uses the same "-ing" (or "am + adjective") for both, learners map all of it onto Korean -고 있다 — and produce sentences like ×창문이 열고 있어요 that no native would say. The truth is that -고 있다 covers only the first meaning, the action genuinely in motion. A completed change that has left something resting in a new state uses a different form, -아/어 있다 — and some "states" use neither, just a plain tense. This page draws the boundary.
What -고 있다 actually means: an action in progress
-고 있다 is the progressive: it says an action is underway right now, mid-motion, and could in principle stop at any moment. It attaches to dynamic, agentive verbs — eating, writing, sleeping, reading — where there's an activity actively unrolling.
지금 밥을 먹고 있어요.
jigeum babeul meokgo isseoyo
I'm eating right now.
친구한테 편지를 쓰고 있어요.
chinguhante pyeonjireul sseugo isseoyo
I'm writing a letter to a friend.
동생이 지금 자고 있어요.
dongsaeng-i jigeum jago isseoyo
My younger sibling is sleeping right now.
The test for -고 있다: could you freeze the scene and point at the activity happening? Eating, writing, sleeping — yes. "Being open," "being seated," "being married" — no; nothing is happening, something has already finished and left a state behind. That's the other form's job.
What -아/어 있다 means: the resultant state after a change
Many English "-ing" or "am + adjective" phrases describe not an action but the result of a completed change. A door opened (a one-moment change) and is now in the open state. A person sat down and is now in the seated state. For the lingering result of a completed intransitive change, Korean uses -아/어 있다 — the resultant-state form.
창문이 열려 있어요.
changmuni yeollyeo isseoyo
The window is open. (it opened and stays open)
손님들이 다 앉아 있어요.
sonnimdeuri da anja isseoyo
The guests are all seated.
벽에 그림이 걸려 있어요.
byeoge geurimi geollyeo isseoyo
A picture is hanging on the wall.
꽃이 예쁘게 피어 있어요.
kkochi yeppeuge pieo isseoyo
The flowers are in bloom, so pretty.
The suffix has two shapes by vowel harmony: -아 있다 after a stem whose last vowel is ㅏ/ㅗ (앉아 있다, 남아 있다), -어 있다 elsewhere (열려 있다, 피어 있다, 서 있다).
The cleanest contrast: opening vs open
The sharpest way to feel the boundary is a minimal pair. The same door supports both aspects — but with different verbs and different subjects. The transitive verb 열다 ("open [something]") with an agent takes 고 있다 (an action in progress); the intransitive verb 열리다 ("[something] opens/becomes open") takes 아/어 있다 (the resulting state).
제가 지금 창문을 열고 있어요.
jega jigeum changmuneul yeolgo isseoyo
I'm opening the window right now. (action in progress)
창문이 열려 있어요.
changmuni yeollyeo isseoyo
The window is open. (resultant state)
| English | Korean | Aspect |
|---|---|---|
| I'm opening the window | 창문을 열고 있어요 | action in progress (고 있다) |
| The window is open | 창문이 열려 있어요 | resultant state (아/어 있다) |
| I'm sitting down | 앉고 있어요 | action in progress (고 있다) |
| I'm seated | 앉아 있어요 | resultant state (아/어 있다) |
The third category: states that take neither
Some English "am + -ing / -ed" expressions are neither a live action nor a resultant-state construction — they're just states, expressed with a plain present or a plain past. The most infamous is "married": a wedding is a completed event, so Korean uses the past 결혼했어요 for the ongoing state of being married. Verbs of cognition and residence use the plain present (or optionally 고 있다 with no change of meaning).
저 결혼했어요.
jeo gyeolhonhaesseoyo
I'm married. (a completed change → past tense, never 고 있다)
그 사실은 저도 알고 있어요.
geu sasireun jeodo algo isseoyo
I'm aware of that too. (알아요 and 알고 있어요 are both fine for 'know')
저는 서울에 살고 있어요.
jeoneun Seoure salgo isseoyo
I live in Seoul. (살아요 and 살고 있어요 both natural)
Note 알다 ("know") and 살다 ("live") are the well-behaved exceptions where 고 있다 is allowed for a state — but only because Korean lets these particular verbs read as "ongoing." You cannot generalize that to 열다 or 앉다; forcing 고 있다 onto them produces the classic errors below.
Common Mistakes
1. 열고 있어요 for "the window is open." The intransitive result of opening is 열려 있다.
❌ 창문이 열고 있어요.
(meaning 'the window is open') Wrong — this tries to say the window is actively opening itself
✅ 창문이 열려 있어요.
changmuni yeollyeo isseoyo
The window is open.
2. 앉고 있어요 for "I'm seated." 앉고 있어요 means you're in the act of sitting down; the resting state is 앉아 있어요.
❌ 지금 의자에 앉고 있어요.
(meaning 'I'm seated') Wrong — 앉고 있어요 = 'I'm in the act of sitting down'
✅ 지금 의자에 앉아 있어요.
jigeum uijae anja isseoyo
I'm sitting on the chair (seated).
3. 결혼하고 있어요 for "I'm married." 결혼하고 있어요 would mean you're in the middle of the ceremony.
❌ 저는 결혼하고 있어요.
(meaning 'I'm married') Wrong — this means 'I'm in the middle of getting married' right now
✅ 저는 결혼했어요.
jeoneun gyeolhonhaesseoyo
I'm married.
4. 서고 있어요 for "someone is standing there." Standing (the posture) is the result of having stood up: 서 있다.
❌ 문 앞에 사람이 서고 있어요.
(meaning 'someone is standing there') Wrong — 서고 있어요 = 'is in the act of standing up'
✅ 문 앞에 사람이 서 있어요.
mun ape sarami seo isseoyo
Someone is standing in front of the door.
Key Takeaways
- -고 있다 = an action genuinely in progress (밥을 먹고 있어요), usually with a transitive/agentive verb.
- -아/어 있다 = the resultant state of a completed intransitive change (창문이 열려 있어요, 앉아 있어요), harmony 아 after ㅏ/ㅗ, 어 elsewhere.
- The minimal pair to memorize: 열고 있다 ("opening") vs 열려 있다 ("open").
- Some "states" take neither — 결혼했어요 (past) for "married"; 살다 / 알다 allow either the plain present or 고 있다.
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Start learning Korean→Related Topics
- 'I have eaten': English Perfect → Wrong Korean TenseTOPIK 2 — Korean has no present perfect — how to route English 'have + past participle' into plain past, present-continuous, or the 'ever' experiential.
- -고 있다: The Progressive ('be …-ing')TOPIK 2 — How to build the progressive: action-verb stem + -고 있다 for an action in progress, with 있다 carrying all the tense, politeness and negation — plus why Korean, unlike English, never forces you to use it.
- -아/어 있다: Resultant StateTOPIK 2 — The resultant-state aspect: an intransitive change-of-state verb + -아/어 있다 describes the lasting state a completed change leaves behind — 앉아 있다 'be seated', 문이 열려 있다 'the door is open'.
- -고 있다 vs -아 있다: Progressive vs ResultantTOPIK 3 — Both translate as 'be …-ing', but -고 있다 marks an action unfolding in real time while -아/어 있다 marks the standing result of a finished action — and only the second one refuses transitive verbs.
- -고 있다 vs -아/어 있다: Progressive vs Resultant StateTOPIK 2 — Two Korean patterns English collapses into one 'be -ing': -고 있다 for an ongoing action, and -아/어 있다 for the state that persists after a change-of-state verb finishes — with the decisive 가고 있다 vs 가 있다 test.