When learning Korean grammar, distinguishing between “-고 말다” and “-아/어 버리다” can be tricky. Both express a completed action, but they convey different nuances. “-고 말다” implies an unintended or inevitable result, while “-아/어 버리다” emphasizes the completion of an action, often with an emotional reaction. This guide will help you understand their differences, meanings, and correct usage.
Contents
1. Definition
- “-고 말다”: This structure emphasizes an unexpected or undesired result, often expressing regret, frustration, or inevitability. It can sometimes imply that the speaker wished for a different outcome.
- “-아/어 버리다”: This structure highlights the completion of an action, often carrying an emotional nuance such as relief, regret, or frustration.
2. Form (Structure)
Here’s a table to help visualize the structure:
| Expression | Structure | Example Sentence |
| -고 말다 | Verb stem + -고 말다 | 시험을 망치고 말았어요. (I ended up failing the test.) |
| -아/어 버리다 | Verb stem + -아/어 버리다 | 돈을 다 써 버렸어요. (I completely spent all my money.) |
3. Meaning & Usage
‘-고 말다’
‘-고 말다’ expresses that an action or event inevitably happened despite efforts to avoid it. It often conveys a sense of regret, disappointment, or frustration because the result was unintended or undesired. However, in some cases, it can also indicate a positive outcome that was ultimately achieved.
- Unintended or regretful results:
- 계획했던 다이어트를 실패하고 말았어요.
(I ended up failing my planned diet.) - 너무 긴장해서 면접에서 실수를 하고 말았어요.
(I got too nervous and ended up making a mistake in the interview.)
- 계획했던 다이어트를 실패하고 말았어요.
- Positive results:
- 열심히 연습한 끝에 드디어 대회에서 우승하고 말았어요.
(After practicing hard, I finally ended up winning the competition!) - 오랜 노력 끝에 회사에서 승진하고 말았어요.
(After a long effort, I finally ended up getting a promotion!)
- 열심히 연습한 끝에 드디어 대회에서 우승하고 말았어요.
‘-고 말다’ is frequently used with past tense (-고 말았다) to reflect the completed nature of the event. However, it can also be used in future tense (-고 말 것이다) when predicting an unavoidable outcome.
- Future Prediction:
- 이렇게 계속 늦잠을 자면 시험에 떨어지고 말 거예요.
(If you keep oversleeping like this, you’ll end up failing the test!) - 계속 미루다 보면 결국 기회를 놓치고 말 거예요.
(If you keep procrastinating, you’ll end up missing the opportunity.) - 운동을 하지 않으면 건강을 잃고 말 것입니다.
(If you don’t exercise, you’ll end up losing your health.)
- 이렇게 계속 늦잠을 자면 시험에 떨어지고 말 거예요.
‘-아/어 버리다’
‘-아/어 버리다’ emphasizes the completion of an action, often with a sense of relief, regret, or frustration depending on the context. It does not always indicate an unintended result, but it often expresses the speaker’s emotions about the action being finalized.
- Expressing regret or frustration:
- 실수로 중요한 파일을 삭제해 버렸어요.
(I accidentally deleted an important file!) - 돈을 다 써 버려서 이번 달은 저축을 못 해요.
(I completely spent all my money, so I can’t save anything this month.)
- 실수로 중요한 파일을 삭제해 버렸어요.
- Expressing relief or satisfaction:
- 드디어 숙제를 다 끝내 버렸어요!
(I finally finished all my homework!) - 걱정했던 발표가 끝나 버려서 이제 한결 편해요.
(The presentation I was worried about is finally over, so I feel much more relaxed.)
- 드디어 숙제를 다 끝내 버렸어요!
‘-아/어 버리다’ is commonly used in past tense (-아/어 버렸다) since it highlights the completion of an event. However, in future tense (-아/어 버릴 것이다), it can indicate something that will inevitably happen, often with an emotional nuance.
- Future Prediction:
- 너무 늦게 출발하면 기차를 놓쳐 버릴 거예요.
(If you leave too late, you’ll end up missing the train!) - 이 책을 시작하면 밤새 읽어 버릴 것 같아요.
(If I start this book, I think I’ll end up reading it all night.) - 이렇게 계속 먹다가는 살이 쪄 버릴 거예요.
(If you keep eating like this, you’ll end up gaining weight.)
- 너무 늦게 출발하면 기차를 놓쳐 버릴 거예요.
Comparison Table
| -고 말다 | -아/어 버리다 | |
| Meaning | An action happens inevitably, often with regret or inevitability | Emphasizes completion of an action, sometimes with relief or frustration |
| Common Usage | Often used with past tense (-고 말았다) but can be used with future tense (-고 말 것이다) | Mostly used in past tense (-아/어 버렸다), occasionally in future tense (-아/어 버릴 것이다) |
| Emotional Nuance | Regret, disappointment, sometimes positive achievement | Regret, frustration, relief, satisfaction |
| Example Sentence | 계획했던 다이어트를 실패하고 말았어요. (I ended up failing my planned diet.) | 드디어 숙제를 다 끝내 버렸어요! (I finally finished all my homework!) |
4. Practice Exercises
Ready to test your understanding of ‘-고 말다’ and ‘-아/어 버리다’? We’ve prepared a set of challenging exercises to help you master these grammar points.
To access the practice exercises and further enhance your Korean grammar skills:
5. Common Mistakes and Tips
- Confusing the nuances:
⚠️ Mistake: Using “-고 말다” for actions done quickly or unexpectedly.
Example:
Incorrect ❌: 갑자기 비가 오고 말았어요. (It suddenly started raining.)
Correct ✅: 갑자기 비가 와 버렸어요. (It suddenly started raining.)
💡 Tip: Remember that “-고 말다” is more about finality or inevitability, while “-아/어 버리다” is often used for quick or unexpected actions.
- Incorrect verb conjugation:
⚠️ Mistake: Not changing the verb stem correctly when using “-아/어 버리다”.
Example:
Incorrect ❌: 먹아 버리다 (to eat up)
Correct ✅: 먹어 버리다 (to eat up)
💡 Tip: Pay attention to the verb’s final vowel when conjugating with “-아/어 버리다”.
- Overusing these structures:
⚠️ Mistake: Using “-고 말다” or “-아/어 버리다” too frequently in speech or writing.
Example:
Incorrect ❌: 아침을 먹고 말았어요. 그리고 학교에 가고 말았어요. 수업을 듣고 말았어요.
(I ended up eating breakfast. Then I ended up going to school. I ended up attending classes.)
Correct ✅: 아침을 먹었어요. 그리고 학교에 갔어요. 수업을 들었어요.
(I ate breakfast. Then I went to school. I attended classes.)
💡 Tip: Use these structures purposefully to convey specific nuances, not as a replacement for simple past tense.
Understanding the difference between “-고 말다” and “-아/어 버리다” is crucial for expressing nuanced meanings in Korean. While both indicate the completion of an action, “-고 말다” emphasizes finality or inevitability, often with a sense of resignation. On the other hand, “-아/어 버리다” suggests thoroughness, quickness, or unexpectedness. By practicing with the examples and exercises provided, you’ll be able to use these structures more confidently and accurately in your Korean conversations and writing.