N + -(이)거든요 / V + -거든요

“-거든요” is placed after a clause to express a reason for something. It can be combined with nouns, verbs, or adjectives.


With nouns (N+(이)거든요):

If there is a final consonant, use ‘-이거든요,’ and if there is not, use ‘-거든요.’ Let’s look at some examples with and without a final consonant.

Case 1.  There IS a final consonant.

  1. A: 미연 씨, 저 사람이랑 많이 닮은 것 같아요. Miyeon, I think you look a lot like that person.

B: 네. 제 동이거든요.  Yeah. It’s because (he) is my brother.

  1. A: 소지품이 거의 다 보라색이네요. 무슨 이유라도 있어요? I see most of your stuff are purple. Is there any reason?

B: 물어보실 줄 알았어요. 제가 가장 좋아하는 이거든요.  I knew you would ask. Because (it) is my favorite color.

  1. A: 호주의 크리스마스는 덥다는 것이 정말이에요? Is it true that the weather is hot in Australia during the Christmas season?

B: 네. 크리스마스 때 호주는 여이거든요. Yeah. It’s because it’s summer in Australia during the season.

Case 2. There is NO final consonant.

  1. A: 커피 맛이 너무 좋네요. 비싸겠어요. 어디에서 사셨는지 물어봐도 돼요? The coffee tastes really good. It must be expensive. May I ask where you bought it?

B: 그럼요. 항상 이탈리아에서 가져와요. 제 고향이 이탈리거든요. Sure. I always bring it from Italy. It’s because my hometown is Italy.

  1. A: 이것은 제가 먹기에 너무 시네요. This is too sour for me to eat.

B: 주요 성분이 비타민 (C)거든요.  Because its major ingredient is vitamin C.

  1. A: 왜 이렇게 일찍 왔어요? Why have you come this early?

B: 곧 제 차거든요. 늦을까 봐요.   Because it’s my turn soon. I was worried I would be late.

With verbs (V+거든요):

When combining with a verb, add ‘-거든요’ to the verb’s stem.


  1. A: 왜 어제 학교에 안 왔어요? 모두들 걱정했어요. Why didn’t you come to school yesterday? Everyone was worried.

B: 갑자기 배가 아팠거든요. 오늘은 좀 나아졌어요.  Because I suddenly had a stomach. It’s gotten a little better today.

아팠다 – 아팠 – 아팠+거든요

  1. A: 보통 사람들보다 계산을 잘 하시네요. You are better with numbers than average people.

B: 수학을 전공하거든요.   It’s because I major in Mathematics.

전공하다 – 전공하 – 전공하+거든요

  1. A: 왜 이 곳을 그렇게 잘 알아요? Why do you know so well about this place?

B: 매일 아침 이 주변을 뛰거든요.  It’s because I run around here every morning.

뛰다 – 뛰 – 뛰+거든요

With adjectives (Adj.+거든요):

When combining with an adjective, add ‘-거든요’ to the adjective’s stem.


  1. A: 왜 울고 있어요? Why are you crying?

B: 지금 보고 있는 영화가 너무 슬프거든요.  Because the movie I’m watching now is too sad.

슬프다 – 슬프 – 슬프+거든요

  1. A: 한국은 어때요? 요즘 집에만 계신 것 같네요. How’s Korea? It seems that you only stay home these days.

B: 요즘 여기 날씨가 너무 춥거든요. 추우니까 나가기 싫어요.  It’s because the weather here is so cold these days. I don’t want to go outside since it’s cold.

춥다 – 춥 – 춥+거든요

  1. A: 왜 이 박스들을 여기 놓아요? Why do you leave these boxes here?

B: 한번에 다 옮기기엔 너무 무겁거든요.  Because it’s too heavy to move them all at once.

무겁다 – 무겁 – 무겁+거든요


Please circle the right answer.

  1. A: 왜 영어를 배워요? Why do (you) learn English?

B: 제가 제일 좋아하는 외국어가 영어(이거든요/거든요).  It’s because my favorite foreign language is Korean.

  1. A: 왜 폴란드 사진들을 벽에 붙여 놨어요? Why do (you) have photos of Poland on your wall?

B: 제 꿈이 폴란드에 사는 것(이거든요/거든요).  It’s because my dream is to live in Poland.

  1. A: 그냥 궁금해서 그러는데요, 왜 그렇게 열심히 운동하세요? Just out of curiosity, why do (you) work out so hard?

B: 모델이 될 생각(이거든요/거든요). It’s because (I) am thinking of becoming a model.

  1. A: 강아지 옷 사요? 사이즈가 너무 작지 않아요? Are you buying clothes for your puppy? Isn’t the size too small?

B: 이것도 충분히 클걸요? 치와와(이거든요/거든요).  Probably, even this will be big enough. (Because) she is a Chihuahua.

  1. A: James Albertson이라는 학생 알아? 어제 퇴학 당했대. Do you know a student named James Albertson? I heard he got expelled yesterday.

B: 뭐라고? 몇 학년인데? What? What grade is he in?

A: 3학년. Third.

B: 아. 깜짝 놀랐네. 내 남자친구 이름도 James Albertson(제임스 알버슨)(이거든/거든). Oh, you scared me. Because my boyfriend’s name is also James Albertson.

Please fill in the blanks.

  1. A: 선생님께서 기분이 굉장히 좋아 보이시네요. (Your) teacher seems to be in a very good mood.

B: [잘 봤다] → 시험을 굉장히 잘 _______________.  It’s because I did very well on the exam.

  1. A: 왜 번지 점프를 싫어하세요? Why do (you) hate bungee jumping?

B: [있다] →고소 공포증이 _____________. It’s because (I) am afraid of heights.

  1. A: 한국에 왜 가시나요? Why are you going to Korea?

B:  [일하고 싶다] → 한국 회사에서 일하고 ______________. It’s because I want to work at a Korean company.

  1. A: 길이 미끄러우니까 다음에 가는 것이 어때요? What about you go next time since the roads are slippery.

B: [약속했다] → 아니요. 가야 해요. 오늘은 꼭 간다고 제 자신과 약속______________.

No. I have to go. Because I promised myself I would go today for sure.

  1. A: 민희 씨의 학교가 한국에서 학부모들에게 가장 인기 있는 고등학교라고 들었어요. I heard your school is the most favored high school among parents.

B: [엄격하다] → 네. 저희 학교는 규칙이 굉장히 엄격__________________. 심지어 학생들을 위한 대기자 명단도 있어요.

Yes. It’s because our school has very strict rules. There is even a wait list for student.

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