-구나/-군요 in Korean: “oh, I see (realizing)”
-구나/-군요
-guna/-gunyo
oh, I see (realizing)
Beginner · Sentence endings
-구나/-군요 (-guna/-gunyo) means "oh, I see" or "so that's how it is." You use it when you notice or realize something new right now. -구나 is casual and -군요 is polite.
How to form it
| When | Add | Example |
|---|---|---|
| Action verb (present) | + 는구나 / 는군요 | 가다 → 가는구나, 먹다 → 먹는군요 |
| ㄹ verb (ㄹ drops) | + 는구나 / 는군요 | 살다 → 사는군요 |
| Adjective stem | + 구나 / 군요 | 예쁘다 → 예쁘구나 |
| Noun | + (이)구나 / (이)군요 | 학생 → 학생이군요 |
| Past tense | 았/었 + 구나 / 군요 | 오다 → 왔구나 |
How to use it
-구나/-군요 shows a small "aha" moment. You have just seen, heard or understood something, and you react to it. In English it is like "Oh, so..." or "I see."
-구나 is casual. People often say it to themselves, or to friends, children and younger people. Parents and older characters in dramas use it a lot when talking to someone younger.
-군요 is polite. It can sound a little formal or thoughtful in speech, so in casual polite talk many people use -네요 instead.
Examples
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Looking out the window
Hearing a foreigner speak
Understanding a reason
Visiting a coworker's town
Don’t mix it up with
-네요: -네요 is a quick, emotional reaction to what you see right now. -군요 feels more like understanding or realizing something, and sounds a bit more formal.
-더라(고요): -구나 reacts to something in the moment. -더라고요 reports to someone else what you noticed earlier.
Common mistakes
Forgetting 는 with action verbs in the present. Say 먹는구나, not 먹구나.
Using it for something you already knew. -구나 is for new realizations.
Want the basics first? Read -네요 vs -죠.
Questions learners ask
What does 구나 mean in Korean?
구나 means "oh, I see" or "so that's it." It shows you just realized something. It is casual.
What is the difference between 군요 and 네요?
Both react to something new. 네요 is quicker and more emotional, and very common in daily speech. 군요 sounds more like a thoughtful realization and is a bit more formal.
When do I use 는구나 instead of 구나?
Use 는구나 with action verbs in the present tense (먹는구나). Use 구나 with adjectives, nouns and the past tense (예쁘구나, 왔구나).