-(으)ㄴ/는걸요 Grammar in Korean: Meaning and How to Use It

What you'll learn

• Attach -(으)ㄴ/는걸요 to verbs, adjectives and nouns, in the present and the past.
• Answer a compliment modestly with 아니에요, 아직 ...걸요.
• Correct someone gently, and react to something you just noticed.
• Choose between -(으)ㄴ/는걸요, -(으)ㄴ/는데요 and the different ending -(으)ㄹ걸요.

Before you start: you should know how to make the modifier forms of a verb (먹는) and an adjective (좋은), and the polite 요 style. It also helps to have met -(으)ㄴ/는데요, the softening ending that sounds closest to this one. Audio plays only when you press a button.

What Does -(으)ㄴ/는걸요 Grammar Mean?

-(으)ㄴ/는걸요 grammar means "actually" and "in fact," said in a soft and slightly modest way. It adds the speaker's own view to a statement and treats that view as a small, gentle correction or discovery. The ending has three common uses: replying to a compliment, contradicting mildly, and noticing something new.

Here are the first two examples. They show a modest reply and a gentle statement about yourself.

• 아니에요, 아직 서투른걸요. (anieyo, ajik seotureungeoryo.) [아니에요 아직 서투른걸료] = "No, I'm still clumsy, you know."
• 저는 괜찮은걸요. (jeoneun gwaenchaneungeoryo.) [저는 괜차는걸료] = "I'm actually fine."

Look at the pieces. 서투른 is the modifier form of the adjective 서투르다 ("to be clumsy"), 괜찮은 is the modifier form of 괜찮다, and 걸요 is the ending. 걸 comes from the bound noun 것 plus the object marker 을, and 요 makes it polite. Literally, 서투른걸요 is something like "it's a case of being clumsy, though." That is why the ending often means "but actually": it points to a fact the listener may not have considered. The sound is worth noticing too. 걸요 is often pronounced [걸료] in everyday speech, with an added ㄹ sound before 요, and a plain [거료] is also heard. The romanization on this page follows the spelling (-georyo). First, the formation.

How Do You Form -(으)ㄴ/는걸요?

-(으)ㄴ/는걸요 is formed by adding a modifier ending to the stem, then 걸요. The modifier depends on the word class. A verb takes -는, an adjective takes -(으)ㄴ, and a noun takes 이다 in the form -인. For the past, add -았/었 and then -는걸요.

The table shows one idea applied to four word types. Write 걸요 attached to the word before it, because it is an ending and not a separate word. The next three parts look at the groups of stems one at a time.

Stems Ending in a Vowel

A vowel stem adds -는 for a verb and -ㄴ for an adjective. 오다 becomes 오는걸요, 쉬다 becomes 쉬는걸요, 바쁘다 becomes 바쁜걸요, and 서투르다 becomes 서투른걸요.

• 어, 눈이 오는걸요. (eo, nuni oneungeoryo.) [어 누니 오는걸료] = "Oh, it's snowing."
• 그 가게는 오늘 쉬는걸요. (geu gageneun oneul swineungeoryo.) [그 가게는 오늘 쉬는걸료] = "That shop is closed today, you know."
• 아니에요, 아직 많이 부족한걸요. (anieyo, ajik mani bujokangeoryo.) [아니에요 아직 마니 부조칸걸료] = "No, I still have a long way to go."

The first sentence is a small discovery: the speaker looks outside and sees snow. The second gently corrects someone who planned to visit the shop. The third is a modest reply. Vowel stems are the simplest case. A stem with a final consonant adds the full syllable.

Stems Ending in a Consonant

A consonant stem adds -는 for a verb and -은 for an adjective. 먹다 becomes 먹는걸요, 읽다 becomes 읽는걸요, and 괜찮다 becomes 괜찮은걸요.

• 민수 씨는 지금 점심을 먹는걸요. (minsu ssineun jigeum jeomsimeul meongneungeoryo.) [민수 씨는 지금 점시믈 멍는걸료] = "Minsu is eating lunch now, you know."
• 저는 그렇게 바쁘지 않은걸요. (jeoneun geureoke bappeuji aneungeoryo.) [저는 그러케 바쁘지 아는걸료] = "I'm not that busy, actually."

In 먹는걸요, the ㄱ of 먹 sounds like ㅇ before the ㄴ of 는, so the word is spoken [멍는걸료]. Two more groups need a short note, because learners expect trouble with them.

Irregular Stems and Nouns

Irregular stems change the same way they change before any modifier ending.

• ㄹ-stems drop the ㄹ: 살다 becomes 사는걸요, and 만들다 becomes 만드는걸요. An adjective ㄹ-stem such as 길다 becomes 긴걸요.
• ㅂ-irregular: 어둡다 becomes 어두운걸요, and 춥다 becomes 추운걸요. 벌써 밖이 어두운걸요 (beolsseo baki eoduungeoryo) [벌써 바끼 어두운걸료], "Look, it's already dark outside."
• ㄷ-irregular: 듣다 becomes 듣는걸요.
• 르-stems: 모르다 becomes 모르는걸요.
• Nouns use 이다: 그 사람은 아직 학생인걸요 (geu sarameun ajik haksaengingeoryo) [그 사라믄 아직 학쌩인걸료], "He's still a student, you know."

With the formation clear, one full sentence can be built step by step.

Worked Example: Building a Sentence with -(으)ㄴ/는걸요

-(으)ㄴ/는걸요 grammar turns a plain statement into a soft "actually." Follow the steps with the statement "I'm not that busy."

1. Start with the plain sentence. 저는 그렇게 바쁘지 않아요. (jeoneun geureoke bappeuji anayo.) = "I'm not that busy." The predicate is the adjective 않다 after -지.
2. Find the dictionary form and stem. 않아요 comes from 않다. The stem is 않.
3. Choose the modifier. 않다 is an adjective-type word, so it takes -(으)ㄴ. The stem ends in a consonant, so use 않은.
4. Add 걸요. 않은 + 걸요 = 않은걸요. (The sound is [아는걸료].)
5. Rebuild the sentence. 저는 그렇게 바쁘지 않은걸요. (jeoneun geureoke bappeuji aneungeoryo.) [저는 그러케 바쁘지 아는걸료] = "I'm not that busy, actually."

You will know it worked when the subject and the adverb stayed in place and the last word became 않은걸요, written in one piece. The most common slip at step 3 is using 는 with an adjective: 않는걸요 is wrong. Each sentence can also appear in several tenses and sentence types, and each has limits.

Which Tenses and Sentence Types Work with -(으)ㄴ/는걸요?

-(으)ㄴ/는걸요 works in the present and the past, in the negative, with an honorific subject and in the casual style. It does not work in formal speech, and it does not work for the future. The table shows the forms for 가다 and 괜찮다.

The casual form drops 요 and often sounds like a happy discovery. An example is 이거 진짜 맛있는걸! (igeo jinjja masinneungeol!) [이거 진짜 마신는걸] ("Wow, this is really good!"). The polite past often reports a change that the listener may not know:

• 벌써 다 먹었는걸요. (beolsseo da meogeonneungeoryo.) [벌써 다 머건는걸료] = "They have already eaten it all, you know."
• 민수 씨는 벌써 갔는걸요. (minsu ssineun beolsseo ganneungeoryo.) [민수 씨는 벌써 간는걸료] = "Minsu has already left, you know."
• 선생님이 저보다 더 잘하시는걸요. (seonsaengnimi jeoboda deo jalhasineungeoryo.) [선생니미 저보다 더 잘하시는걸료] = "You're the one who is better than me, teacher."

The last sentence is a typical modest reply: the speaker turns the compliment back to the other person. The next section compares this ending with the one that looks closest.

How Is -(으)ㄴ/는걸요 Different from -(으)ㄴ/는데요?

-(으)ㄴ/는걸요 and -(으)ㄴ/는데요 both soften a sentence, but they do different jobs. -(으)ㄴ/는데요 sets a scene and leaves the sentence open, so the listener is invited to answer. -(으)ㄴ/는걸요 states the speaker's own view, often as a modest reply or a gentle contradiction.

Both sentences are correct. 괜찮은데요 sounds like the start of something, such as "I'm fine, so what shall we do?" 괜찮은걸요 sounds like a small closing statement, as in "Really, I'm fine." A second neighbour is -군요 and -네요, which show surprise at something you notice now, with no "actually" feeling. A third is -(으)ㄹ걸요, a different ending that means "probably." These contrasts lead to the variations of the pattern itself.

Variations and Edge Cases of -(으)ㄴ/는걸요

-(으)ㄴ/는걸요 has four common variations: the modest reply, the gentle correction, the small discovery and the casual -(으)ㄴ/는걸. Each one is short, and each appears in real conversation.

• A modest reply. Koreans often deflect a compliment: when someone says 한국어를 정말 잘하시네요, you can answer 아니에요, 아직 서투른걸요. The word 아니에요 ("no") shows modesty, and 걸요 softens it.
• A gentle correction. It tells the listener a fact they may not know: 그 가게는 오늘 쉬는걸요.
• A small discovery. It reports something you have just noticed: 어, 눈이 오는걸요.
• Casual -(으)ㄴ/는걸. With friends, drop 요: 와, 벌써 눈이 오는걸! It sounds like a cheerful "Oh, look!"

A reminder about spacing: -는걸요 is one ending. The spaced sequence -는 걸 is a different thing, the noun 것 with the object marker 을. For example, 눈이 오는 걸 봤어요 (nuni oneun geol bwasseoyo) means "I saw the snow falling," and 걸 is the object of 봤어요. This lesson covers the common forms used in daily life. It does not cover the written pattern -(으)ㄴ/는 것을, which is a separate topic. The mistakes below show where the boundaries cause real errors.

What Mistakes Do Learners Make with -(으)ㄴ/는걸요?

Learners most often get the modifier, the spacing, the meaning or the tone wrong. Four mistakes appear again and again.

1. Using -는 with an adjective. 괜찮는걸요 is wrong, because 괜찮다 is an adjective. Say 괜찮은걸요.
2. Spacing the ending. 서투른 걸요 is wrong when you mean the soft ending. Write 서투른걸요 in one piece.
3. Confusing it with -(으)ㄹ걸요. 올걸요 means "He will probably come," while 오는걸요 means "He is coming, you know." The two endings differ by a single sound, but their meanings are very different.
4. Saying it with a hard tone. Not a spelling error, but -걸요 should sound gentle. Said sharply, it can sound like you are arguing. Keep the voice soft, and with seniors, keep the 요.

A quick check for any sentence with this ending: Is the modifier right for the word class (verb -는, adjective -(으)ㄴ, noun -인)? Is 걸요 written attached? Is the tone gentle? If all three answers are yes, the sentence is sound.

The practice set below tests these points directly.

Practice and Answers

Try the four items before you read the answer key. Cover the answers with your hand.

1. Translate. "No, I'm still clumsy, you know." Use 서투르다 and 아직.
2. Choose the modifier. "I'm actually fine." (저는 괜찮은걸요 / 저는 괜찮는걸요)
3. Form the pattern. Tell a friend, gently, that the shop is closed today, with 쉬다.
4. Write your own. Answer the compliment 한국어 정말 잘하시네요 modestly, using -걸요.

Answer key

1. 아니에요, 아직 서투른걸요. The adjective 서투르다 takes -ㄴ.
2. 저는 괜찮은걸요. Adjectives take -(으)ㄴ.
3. 그 가게는 오늘 쉬는걸요. A verb takes -는걸요.
4. 아니에요, 아직 많이 부족한걸요. (anieyo, ajik mani bujokangeoryo.) = "No, I still have a long way to go." Answers vary. Check that an adjective has -(으)ㄴ before 걸요.

If you can complete items 1 to 3 without the key, you can use the pattern in conversation. Next, the lesson hands off to related patterns.

What Should You Learn Next after -(으)ㄴ/는걸요 Grammar?

After -(으)ㄴ/는걸요 grammar, learn the open-ended softener, then the endings for surprise. This lesson teaches the soft "actually," and it does not cover the guess ending -(으)ㄹ걸요 in depth. That lives on its own page.

1. Start with -(으)ㄴ/는데요, the open-ended softener.
2. Compare it with -(으)ㄹ걸요, the guess ending that looks similar.
3. Continue with -군요 and -네요, the endings for surprise in the present moment.
4. Return to Exclamations and Realization to see every lesson in this set, or to the Advanced Grammar list for other B2 patterns.

With these steps, -(으)ㄴ/는걸요 becomes automatic: choose the right modifier, add 걸요 in one piece, and keep the tone gentle.

Frequently Asked Questions

What does -(으)ㄴ/는걸요 mean?

-(으)ㄴ/는걸요 means "actually," "in fact" or "you know," said in a soft way. Replying 아니에요, 아직 서투른걸요 to a compliment means "No, I'm still clumsy, you know," and 저는 괜찮은걸요 means "I'm actually fine." It can also show a small surprise: 어, 눈이 오는걸요 means "Oh, it's snowing."

How do I attach -(으)ㄴ/는걸요 to a verb or adjective?

A verb takes -는걸요 (가다 becomes 가는걸요, 먹다 becomes 먹는걸요). An adjective takes -(으)ㄴ걸요 (괜찮다 becomes 괜찮은걸요, 바쁘다 becomes 바쁜걸요). A noun takes -인걸요 (학생인걸요). ㄹ-stems drop the ㄹ (사는걸요), and ㅂ-irregular adjectives change (어둡다 becomes 어두운걸요).

Can -(으)ㄴ/는걸요 be used in the past tense?

Yes. Add -았/었 and then -는걸요: 민수 씨는 벌써 갔는걸요 means "Minsu has already left, you know," and 벌써 다 먹었는걸요 means "They have already eaten it all." There is no future form. For a guess about the future, use the different ending -(으)ㄹ걸요 ("probably").

Is -(으)ㄴ/는걸요 used in speech or only in writing?

It is a spoken ending. Use -걸요 in polite talk and drop the 요 with friends: 이거 진짜 맛있는걸! You do not use it in formal speech or in essays. It sounds natural when you answer a compliment, correct someone gently or react to something you just noticed.

What is the most common mistake with -(으)ㄴ/는걸요?

The most common mistake is the wrong modifier. An adjective never takes -는, so 괜찮는걸요 is wrong and 괜찮은걸요 is right. A second mistake is confusing it with -(으)ㄹ걸요: 올걸요 means "He will probably come," while 오는걸요 means "He is coming, you know."

What is the difference between -(으)ㄴ/는걸요 and -(으)ㄴ/는데요?

Both soften a sentence, but they do different jobs. -(으)ㄴ/는데요 leaves the thought open and invites a reply, such as a request or a hint. -(으)ㄴ/는걸요 states the speaker's own view, often as a modest reply or a gentle contradiction, and it adds a feeling of "actually" or "you know."

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