Korean -고 있다 vs -아/어 있다: Which "Is Doing" Do You Need?

Quick answer: -고 있다 (-go itda) means an action is in progress — "is doing it." -아/어 있다 (-a/eo itda) means the action already finished and the result is still true — "is in that state." So 앉고 있어요 is someone lowering themselves onto a chair, and 앉아 있어요 is someone who is already sitting there.

English uses one shape, "is -ing," for both of these. "He's sitting on the sofa" almost never means we're watching his knees bend — it means he's already down. Korean splits the two, and that split is the whole lesson. Get it, and a dozen sentences you've been building wrong fix themselves at once.

The forms

-고 있다 attaches to any verb stem, no vowel rules to worry about:

• 먹다 → 먹고 있어요
• 하다 → 하고 있어요
• 기다리다 → 기다리고 있어요

-아/어 있다 follows the usual 아/어 rule, the same one you use for 아/어요:

• 앉다 → 앉아 있어요
• 서다 → 서 있어요
• 열리다 → 열려 있어요

Both are written with a space before 있다. 먹고 있어요, 앉아 있어요 — never 먹고있어요.

-고 있다: the action is still running

This is the everyday progressive. The verb is happening right now, in front of you.

• 지금 밥 먹고 있어요. — I'm eating right now.
• 누구 기다리고 있어요? — Are you waiting for someone?
• 요즘 한국어를 배우고 있어요. — I'm learning Korean these days.
• 동생이 자고 있어요. — My younger sibling is sleeping.
• 지금 가고 있어요. — I'm on my way.

That last one is the text message every Korean person sends when they're late. Note that 자고 있어요 uses -고 있다 even though sleeping feels like a state — Korean treats it as an ongoing action, and 자 있어요 does not exist.

-고 있다 also covers things that are true over a stretch of your life, not just this second: 서울에 살고 있어요 (I'm living in Seoul), 은행에서 일하고 있어요 (I work at a bank).

-아/어 있다: the action is over, the result is still there

Here the verb already happened. What you see now is what it left behind.

• 친구가 의자에 앉아 있어요. — My friend is sitting on a chair. (already seated)
• 밖에 사람들이 서 있어요. — People are standing outside.
• 아이가 침대에 누워 있어요. — The child is lying on the bed.
• 창문이 열려 있어요. — The window is open.
• 불이 켜져 있어요. — The light is on.
• 아직 자리가 남아 있어요. — There are still seats left.
• 엄마는 벌써 집에 와 있어요. — Mom is already home. (she came and is there)

Notice the particle in 의자에 앉아 있어요: it's 에, the location where something rests, not 에서. If that choice still feels shaky, the 에 vs 에서 guide sorts it out in nine sentences.

The pairs worth memorizing

That last pair matters. 할머니는 부산에 살고 있어요 means Grandmother lives in Busan. 할머니는 아직 살아 계세요 means Grandmother is still alive. Say 부산에 살아 있어요 and a Korean ear hears something strange and slightly grim — "she is alive in Busan."

The rule that saves you: no object with -아/어 있다

Here is the test. -아/어 있다 only attaches to verbs that take no object. 앉다, 서다, 눕다, 남다, 가다, 오다, 살다 — none of these need 을/를.

So what about 열다 (to open), which does take an object? You can't say 문을 열어 있어요. You change the verb to its passive partner first, and then add -아/어 있다:

• 열다 → 열리다 → 문이 열려 있어요 (The door is open.)
• 닫다 → 닫히다 → 가게가 닫혀 있어요 (The shop is closed.)
• 켜다 → 켜지다 → 에어컨이 켜져 있어요 (The air conditioner is on.)
• 놓다 → 놓이다 → 책상 위에 꽃이 놓여 있어요 (There are flowers set on the desk.)

The subject particle flips to 이/가 too, because the door isn't doing anything — it's just in that condition. If 놓다 and its neighbors 두다, 넣다, 담다 blur together for you, this guide to the Korean words for "put" is worth ten minutes.

Clothes are the exception everyone trips on

For 입다 (wear clothes), 신다 (wear shoes), 쓰다 (wear a hat or glasses), 끼다 (wear a ring or gloves), Korean uses -고 있다 for both meanings. 입어 있어요 is simply wrong.

• 그 사람은 오늘 검은색 코트를 입고 있어요. — He's wearing a black coat today.
• 안경을 쓰고 있는 사람이 제 친구예요. — The person wearing glasses is my friend.

Yes, 코트를 입고 있어요 can technically mean "is putting the coat on," but context almost always makes it the state. If you really need to stress the action in progress, Koreans say 입는 중이에요 (in the middle of putting it on).

A few verbs work like this too: 알고 있어요 (I know), 가지고 있어요 (I have it). These are states, but they take -고 있다.

Speaking politely about someone older

When the subject deserves respect, 있다 becomes 계시다:

• 사장님은 통화하고 계세요. — The boss is on the phone.
• 할아버지가 소파에 앉아 계세요. — Grandfather is sitting on the sofa.
• 여기 앉아 계세요. — Please stay seated here.

The honorific machinery behind that swap is covered in the article on the honorific -(으)시-.

What the mistakes sound like

None of these break the sentence beyond understanding, but they all mark you instantly as a learner. The fix is one decision: is it still happening, or is it already done and still true?

FAQ

What is the difference between 앉고 있어요 and 앉아 있어요?

앉고 있어요 describes the act of sitting down while it's happening — bending the knees, lowering onto the chair. 앉아 있어요 describes someone who already sat down and is still there. In daily life you want 앉아 있어요 almost every time, because "he's sitting over there" means he's already seated.

How do you say "I'm doing something right now" in Korean?

Use verb stem + -고 있어요: 지금 공부하고 있어요 (I'm studying right now), 밥 먹고 있어요 (I'm eating). For extra emphasis on "in the middle of it," you can use -는 중이에요, as in 회의하는 중이에요 (I'm in a meeting).

Can I use -아/어 있다 with any verb?

No. It only works with verbs that take no object — 앉다, 서다, 눕다, 남다, 가다, 오다, 열리다, 닫히다, 켜지다 and similar. If the verb needs 을/를, either use -고 있다 or switch to the passive form first, like 열다 → 열리다 → 열려 있어요.

Practice

Fill in the blank with -고 있어요 or -아/어 있어요.

1. 지금 뭐 해요? — 밥 ____. (먹다)
2. 친구가 카페에 ____. (앉다 — already seated)
3. 저는 부산에 ____. (살다 — live there)
4. 창문이 ____. (열리다)
5. Say it in Korean: "The light is on."