니까/-(으)니까 in 30 Seconds
- Indicates a reason or cause for the following clause.
- Attaches to verb/adjective stems and nouns based on final sound.
- Similar to English 'because' or 'so'.
- Crucial for explaining actions and decisions.
- Core Meaning
- The Korean grammatical ending 니까/-(으)니까 is a crucial connector that indicates a reason or cause for an action or statement that follows. It's fundamentally equivalent to 'because' or 'so' in English, but with specific grammatical rules for its attachment.
- Attachment Rules
- The form -(으)니까 is attached to verb and adjective stems. If the stem ends in a vowel or the consonant 'ㄹ', you use -니까. If the stem ends in a consonant other than 'ㄹ', you use -으니까. For nouns, it attaches as -(이)니까, with -니까 following a vowel and -이니까 following a consonant.
- Expressing Causality
- This ending is used to explain why something is happening or why a certain decision was made. It establishes a logical connection between two clauses, where the first clause provides the reason for the second. It's a very common and versatile construction in everyday Korean conversation and writing.
날씨가 좋으니까 공원에 갈 거예요. (Because the weather is good, I will go to the park.)
바쁘니까 나중에 다시 전화할게요. (Because I am busy, I will call you back later.)
학생이니까 조용히 해야 해요. (Because I am a student, I must be quiet.)
- Verb Stems Ending in Vowels or 'ㄹ'
- When the verb or adjective stem ends in a vowel (like ㅏ, ㅓ, ㅗ, ㅜ, ㅡ, ㅣ, ㅐ, ㅔ, etc.) or the consonant 'ㄹ', you attach -니까. For example, the verb stem '가다' (to go) becomes '가니까'. The adjective stem '크다' (to be big) becomes '크니까'. The verb stem '만들다' (to make) becomes '만드니까'.
- Verb Stems Ending in Other Consonants
- If the verb or adjective stem ends in a consonant other than 'ㄹ' (like ㄱ, ㄴ, ㄷ, ㅂ, ㅅ, etc.), you attach -으니까. For instance, the verb stem '먹다' (to eat) becomes '먹으니까'. The adjective stem '좋다' (to be good) becomes '좋으니까'. The verb stem '읽다' (to read) becomes '읽으니까'.
- Noun Stems
- For nouns, the ending is -(이)니까. If the noun ends in a vowel, you use -니까. If it ends in a consonant, you use -이니까. For example, '친구' (friend) becomes '친구니까'. '선생님' (teacher) becomes '선생님이니까'.
- Sentence Structure
- The sentence structure is typically: [Reason Clause with -(으)니까] + [Result Clause]. The result clause usually contains a statement, a request, a suggestion, or a command that logically follows from the reason given.
시간이 없으니까 택시를 타요. (Because I don't have time, I'm taking a taxi.)
이것이 제일 맛있는 빵이니까 이걸로 하세요. (Because this is the most delicious bread, please choose this one.)
한국어를 배우니까 한국 문화도 같이 배우게 돼요. (Because I am learning Korean, I also end up learning Korean culture.)
- Everyday Conversations
- You will hear -(으)니까 constantly in daily interactions. When friends explain why they are late, why they chose a certain restaurant, or why they can't join an activity, this ending is frequently used. For example, a friend might say, '늦었으니까 빨리 와!' (Because I'm late, come quickly!).
- Explanations and Justifications
- In situations where someone needs to justify their actions or provide a reason for a decision, -(으)니까 is indispensable. A parent explaining to a child why they need to study: '시험이 있으니까 공부해야지.' (Because there's a test, you have to study.). A salesperson explaining a product's feature: '이 제품은 기능이 좋으니까 추천해 드립니다.' (Because this product has good features, I recommend it.).
- Requests and Suggestions
- It's also used to preface requests or suggestions, making them sound more polite or understandable. '배가 고프니까 뭐 좀 먹을까요?' (Because I'm hungry, shall we eat something?). '날씨가 더우니까 시원한 데 가요.' (Because the weather is hot, let's go somewhere cool.).
- Formal Settings
- While -(으)니까 is very common in informal speech, it is also used in more formal writing and speeches, though often paired with more formal sentence endings. For example, in a presentation: '본 연구는 기존의 한계를 극복하으니까 큰 의미가 있습니다.' (Because this research overcomes existing limitations, it has great significance.).
TV 드라마 대사: '사랑하니까 너를 보내주는 거야.' (Because I love you, I am letting you go.)
뉴스 인터뷰: '경제 상황이 어렵으니까 정부의 지원이 절실합니다.' (Because the economic situation is difficult, government support is desperately needed.)
친구와의 대화: '오늘 너무 피곤하니까 집에서 쉬고 싶어.' (Because I'm so tired today, I want to rest at home.)
- Incorrect Attachment
- A frequent mistake is applying the wrong ending based on the stem's final sound. Forgetting to add -으 before -니까 when the stem ends in a consonant other than 'ㄹ' is common. For example, saying '먹니까' instead of '먹으니까' (because I eat) or '좋니까' instead of '좋으니까' (because it's good).
- Confusing with Other Connectors
- Learners might confuse -(으)니까 with other causal conjunctions like -아/어서. While both express reason, -아/어서 is more versatile and can connect sequential events or express a cause where the result is a natural consequence. -(으)니까 often implies a more subjective reason or a reason that leads to a specific action or decision by the speaker, and it cannot be used for commands or suggestions in the same way -아/어서 can.
- Using it for Commands/Suggestions Incorrectly
- As mentioned, -(으)니까 is generally not used to give direct commands or suggestions, especially if the reason is negative. Saying '비가 오니까, 나가!' (Because it's raining, go out!) sounds unnatural and even rude. Use -아/어서 or other connectors for such contexts.
- Attaching to Past Tense Stems
- You should attach -(으)니까 to the present tense stem, not the past tense stem. For instance, it should be '가니까' (because I go), not '갔으니까' (because I went - this is grammatically incorrect in this context). If you want to express a past reason, you would typically use a different construction or phrase it differently.
Incorrect: '늦었으니까 빨리 와!' (when it should be '늦었기 때문에 빨리 와!' or '늦었으니까 빨리 와!' where the '늦었' is understood as a state, not a completed action in a way that precludes '니까') - The nuance is subtle, but for a direct reason for a command, other forms are safer. A more natural phrasing with '늦었' would be '제가 늦었으니까 먼저 들어가세요.' (Because I am late, please go in first.)
Incorrect: '이것이 싸으니까 이걸 사세요.' (While understandable, -아/어서 is often preferred for simple recommendations like this: '이것이 싸서 이걸 사세요.')
- -아/어서 (Verb/Adjective)
- Both -(으)니까 and -아/어서 indicate cause or reason. However, -아/어서 is more general and can connect sequential events or describe a natural progression. It can also be used for commands and suggestions. -(으)니까 often implies a more subjective reason or a reason that leads to a specific decision or action by the speaker, and it's generally not used for direct commands/suggestions.
- -기 때문에 (Noun + ' 때문에')
- This phrase means 'because of' or 'due to'. It's more formal than -(으)니까 and is often used in writing or more formal speech. It can be attached to noun phrases (e.g., '비 때문에' - because of the rain) or verb/adjective stems via the nominalizer -기 (e.g., '늦었기 때문에' - because I was late). It clearly states a reason and can be used for commands and suggestions.
- -기 (Nominalizer)
- The nominalizer -기 turns a verb or adjective into a noun-like form. It's often used in conjunction with other particles or phrases to express cause. For example, -기 때문에 is a primary example. It can also be used in constructions like '하기 싫어서' (because I don't want to do it).
- -니/으니까 (Informal)
- This is a more informal, colloquial version of -(으)니까, often used between close friends or to younger people. It follows similar attachment rules: -니 after vowels and -으니까 after consonants. For example, '배고프니 밥 먹자.' (Because you're hungry, let's eat.).
- Comparison Table
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Ending Meaning Usage Example -(으)니까 Because, so Subjective reason, decision-making, not for commands 바쁘니까 택시 타요. -아/어서 Because, so; and then General reason, sequential events, can be used for commands/suggestions 배고파서 밥 먹어요. -기 때문에 Because of, due to Formal, objective reason, can be used for commands/suggestions 사정이 있어서 못 가요.
How Formal Is It?
Fun Fact
The -으 in -(으)니까 is a vowel insertion that helps smooth the pronunciation when attaching to consonant stems. This type of vowel insertion is common in Korean grammar to maintain phonetic flow.
Pronunciation Guide
- Pronouncing it too quickly without emphasizing the double 'k'.
- Not clearly distinguishing it from '-니까' in speech.
- Adding an unnecessary vowel sound before '-니까' when it attaches to a consonant stem.
Difficulty Rating
Understanding the meaning of <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-(으)니까</mark> is crucial for comprehending the flow of arguments and explanations in Korean texts. Its usage is widespread, making it essential for reading comprehension at A2 level and above.
Correctly conjugating <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-(으)니까</mark> based on the stem's final sound is a common challenge for learners. Accurate usage is vital for clear and logical written expression.
Spontaneously using <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-(으)니까</mark> in conversation requires practice with conjugation and understanding its nuances compared to other causal connectors.
Recognizing <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-(으)니까</mark> in spoken Korean helps learners follow explanations and understand the speaker's reasoning.
What to Learn Next
Prerequisites
Learn Next
Advanced
Grammar to Know
Verb/Adjective Stem Conjugation
Understanding how to find the stem of verbs and adjectives (e.g., '먹다' -> '먹-', '좋다' -> '좋-') is fundamental before attaching endings like -(으)니까.
Vowel Harmony
While -(으)니까 has a fixed 'ㅡ' vowel, other endings like -아/어서 follow vowel harmony rules (e.g., '가다' -> '가서', '먹다' -> '먹어서').
Past Tense Formation
To express a past reason, the past tense is formed first, then -(으)니까 is attached (e.g., '늦다' -> '늦었-' -> '늦었으니까').
Noun vs. Verb/Adjective Stem Attachment
Nouns take -(이)니까, while verbs and adjectives take -(으)니까. This distinction is crucial.
Sentence Connectors
-(으)니까 functions as a sentence connector, linking two independent clauses to show a causal relationship.
Examples by Level
날씨가 좋아요.
The weather is good.
배가 고파요.
I am hungry.
시간이 없어요.
I don't have time.
이것은 책이에요.
This is a book.
저는 학생이에요.
I am a student.
날씨가 더워요.
The weather is hot.
이것은 맛있어요.
This is delicious.
저는 피곤해요.
I am tired.
날씨가 좋으니까 공원에 갈 거예요.
Because the weather is good, I will go to the park.
Verb stem '좋다' + -(으)니까
바쁘니까 나중에 다시 전화할게요.
Because I am busy, I will call you back later.
Verb stem '바쁘다' + -니까
학생이니까 조용히 해야 해요.
Because I am a student, I must be quiet.
Noun '학생' + -이니까
시간이 없으니까 택시를 타요.
Because I don't have time, I'm taking a taxi.
Verb stem '없다' + -으니까
이것이 제일 맛있는 빵이니까 이걸로 하세요.
Because this is the most delicious bread, please choose this one.
Noun '빵' + -이니까
한국어를 배우니까 한국 문화도 같이 배우게 돼요.
Because I am learning Korean, I also end up learning Korean culture.
Verb stem '배우다' + -니까
비가 오니까 밖에 나가지 마세요.
Because it is raining, do not go outside.
Verb stem '오다' + -니까
머리가 아프니까 쉬고 싶어요.
Because my head hurts, I want to rest.
Adjective stem '아프다' + -니까
늦었으니까 서둘러 주세요.
Because I am late, please hurry.
Verb stem '늦다' + -었- + -(으)니까
이것은 제가 가장 좋아하는 책이니까 꼭 읽어보세요.
Because this is my favorite book, please be sure to read it.
Noun '책' + -이니까
경제가 어려우니까 많은 사람들이 힘들어하고 있습니다.
Because the economy is difficult, many people are struggling.
Adjective stem '어렵다' + -우니까
연습을 많이 했으니까 이번에는 잘 할 수 있을 거예요.
Because I practiced a lot, I will be able to do well this time.
Verb stem '하다' + -었- + -(으)니까
이 식당은 음식이 맛있으니까 한번 가보세요.
Because the food at this restaurant is delicious, try going there once.
Adjective stem '맛있다' + -으니까
그는 매우 친절한 사람이니까 걱정하지 마세요.
Because he is a very kind person, don't worry.
Noun '사람' + -이니까
날씨가 쌀쌀하으니까 따뜻하게 입고 나가세요.
Because the weather is chilly, dress warmly and go out.
Adjective stem '쌀쌀하다' + -으니까
시험이 코앞이니까 밤새 공부해야 해요.
Because the exam is just around the corner, I have to study all night.
Noun '코앞' + -이니까
그는 약속을 잘 지키는 사람이니까 믿어도 됩니다.
Because he is a person who keeps his promises well, you can trust him.
Noun '사람' + -이니까
이 문제는 복잡하으니까 전문가의 도움이 필요합니다.
Because this problem is complicated, expert help is needed.
Adjective stem '복잡하다' + -으니까
환경 보호는 우리 모두의 책임이니까 다 같이 노력해야 합니다.
Because environmental protection is everyone's responsibility, we must all make an effort together.
Noun '책임' + -이니까
그가 제안한 방식은 효율적이니까 시도해 볼 만합니다.
Because the method he proposed is efficient, it is worth trying.
Adjective stem '효율적이다' + -이니까
오랜 시간 동안 준비했으니까 결과가 좋을 것이라고 확신합니다.
Because we have prepared for a long time, I am confident that the results will be good.
Verb stem '하다' + -었- + -(으)니까
이 지역은 관광객이 많으니까 숙박 시설이 잘 갖추어져 있습니다.
Because there are many tourists in this area, accommodation facilities are well-equipped.
Adjective stem '많다' + -으니까
그는 경험이 풍부한 전문가이니까 그의 조언을 따르는 것이 좋습니다.
Because he is an experienced expert, it is good to follow his advice.
Noun '전문가' + -이니까
긴급 상황이니까 지체할 시간이 없습니다.
Because it is an emergency situation, there is no time to delay.
Noun '상황' + -이니까
그의 주장은 논리적이니까 반박하기 어렵습니다.
Because his argument is logical, it is difficult to refute.
Adjective stem '논리적이다' + -이니까
이 제도는 사회적 약자를 보호하니까 긍정적으로 평가받고 있습니다.
Because this system protects the socially vulnerable, it is being evaluated positively.
Verb stem '보호하다' + -니까
기술 발전이 가속화되니까 우리는 끊임없이 학습해야 합니다.
Because technological advancement is accelerating, we must learn continuously.
Verb stem '되다' + -니까
이번 캠페인은 시민들의 자발적인 참여이니까 그 의미가 더욱 큽니다.
Because this campaign is due to citizens' voluntary participation, its meaning is even greater.
Noun '참여' + -이니까
그의 연설은 감동적이었으니까 많은 사람들에게 깊은 인상을 남겼습니다.
Because his speech was moving, it left a deep impression on many people.
Adjective stem '감동적이다' + -었- + -(으)니까
이 문제는 수십 년간 논의되어 온 복잡한 사안이니까 쉽게 해결될 수 없습니다.
Because this is a complex issue that has been discussed for decades, it cannot be easily resolved.
Noun '사안' + -이니까
인간은 사회적 동물이니까 타인과의 관계 속에서 의미를 찾습니다.
Because humans are social animals, they find meaning in relationships with others.
Noun '동물' + -이니까
그의 주장은 객관적인 증거에 기반하이니까 신뢰할 만합니다.
Because his claim is based on objective evidence, it is trustworthy.
Verb stem '기반하다' + -니까
역사적 맥락을 고려하니까 현재의 사건들을 더 깊이 이해할 수 있습니다.
Because we consider the historical context, we can understand current events more deeply.
Verb stem '고려하다' + -니까
이 현상은 다층적인 요인들이 복합적으로 작용한 결과이니까 단일한 해결책을 제시하기 어렵습니다.
Because this phenomenon is the result of multiple factors acting in complexity, it is difficult to propose a single solution.
Noun '결과' + -이니까
그의 발언은 비록 직설적이었지만, 그 이면에는 진심이 담겨 있었으니까 오해하지 말아야 합니다.
Although his remarks were blunt, because there was sincerity behind them, we should not misunderstand.
Adjective stem '직설적이다' + -었- + -지만, Adjective stem '담겨 있다' + -었- + -(으)니까
현대 사회는 정보의 홍수 속에 살고 있으니까 비판적 사고 능력이 더욱 중요해지고 있습니다.
Because we live in an age of information overload in modern society, critical thinking skills are becoming even more important.
Verb stem '있다' + -으니까
이 프로젝트는 윤리적 딜레마를 내포하고 있으니까 신중한 접근이 요구됩니다.
Because this project entails ethical dilemmas, a cautious approach is required.
Verb stem '있다' + -이니까
인간의 본성은 복잡미묘하니까 모든 행동을 하나의 동기로 설명할 수는 없습니다.
Because human nature is complex and subtle, all actions cannot be explained by a single motive.
Adjective stem '복잡미묘하다' + -니까
그의 작품은 시대정신을 반영하고 있다는 평가를 받으니까 문학사적 가치가 높습니다.
Because his work is evaluated as reflecting the spirit of the age, its literary historical value is high.
Verb stem '반영하다' + -고 있다 + -니까
과학적 발견은 끊임없는 의문과 탐구의 과정이니까 실패를 두려워해서는 안 됩니다.
Because scientific discovery is a process of constant questioning and exploration, one should not fear failure.
Noun '과정' + -이니까
Common Collocations
Common Phrases
— I'm busy, so later (please). This is a polite way to defer a request or conversation.
지금은 바쁘니까 나중에요. 제가 다시 연락드릴게요.
— Because I don't have time. Often used as an explanation for not being able to do something.
죄송하지만, 시간이 없으니까 다음 기회에 할게요.
— Because the weather is good. Used to suggest an outdoor activity or explain a positive mood.
날씨가 좋으니까 어디라도 나가고 싶어요.
— It's delicious, so please try it. A recommendation.
이 집 김치가 맛있으니까 드셔보세요.
— I'm sleepy, so I should sleep. A statement of intent to go to bed.
벌써 밤 11시네요. 졸리니까 자야겠어요.
— It's okay, so don't worry. A phrase of reassurance.
저한테 맡겨주세요. 괜찮으니까 걱정 마세요.
— It's hard/difficult, so please rest. An expression of concern and suggestion.
오늘 하루 종일 일하셨잖아요. 힘드니까 좀 쉬세요.
— The reason is because... Used to introduce an explanation.
제가 그렇게 말한 이유는 당신을 걱정했으니까요.
— Because it was cold (implies a process or realization). Note: This is a less common or slightly nuanced usage. '추우니까' is more direct.
날씨가 춥다 보니까 따뜻한 음식이 생각났어요.
— Just because... Used to give a simple, often unelaborated reason.
왜 하냐고요? 그냥, 그냥 좋으니까 하는 거죠.
Often Confused With
Both express reason. -(으)니까 is often more subjective and not used for commands, while -아/어서 is more general and can be used for commands.
This is a more formal way to express reason, often used in writing. -(으)니까 is more common in spoken Korean.
This is the informal, often shortened version of -(으)니까, used in very casual settings.
Idioms & Expressions
— To be in a very urgent situation; to have a crisis.
시험이 내일이니까 발등에 불 떨어진 것처럼 공부하고 있어요. (Because the exam is tomorrow, I'm studying as if the fire has fallen on my instep.)
Informal— To be on the edge of one's seat; to be extremely nervous or excited.
경기가 너무 치열하니까 손에 땀을 쥐고 봤어요. (Because the game was so fierce, I watched it with sweaty palms.)
Informal— To relax; to stop worrying.
이제 다 끝났으니까 마음을 놓아도 돼요. (Because it's all finished now, you can relax.)
Neutral— To be in despair; to see no way out of a difficult situation.
갑자기 실직을 했으니까 눈앞이 캄캄했어요. (Because I suddenly lost my job, my vision went dark.)
Informal— To seize an opportunity.
좋은 기회가 왔으니까 꼭 잡아야 해요. (Because a good opportunity has come, you must seize it.)
Neutral— To get heated up (in an argument or discussion); to be enthusiastic.
토론이 너무 치열하니까 사람들이 다들 열을 올리고 있어요. (Because the debate is very fierce, everyone is getting heated up.)
Informal— To sleep soundly; to be free from worry.
이제 모든 문제가 해결되었으니까 발을 뻗고 잘 수 있어요. (Because all problems are now solved, I can sleep soundly.)
Neutral— To worry someone greatly; to cause someone a lot of trouble.
자식이 속을 너무 썩이으니까 부모님께서 걱정이 많으세요. (Because the child causes the parents a lot of worry, they are very concerned.)
Informal— To count one's chickens before they hatch; to be overly optimistic about a future outcome.
아직 결과도 안 나왔는데 벌써 축하 파티를 하다니, 김칫국 마시는 것 같아. (This idiom often appears in sentences where the reason for the premature celebration is implied or contrasted, rather than directly stated with -(으)니까.)
Informal— To pour cold water on something; to dampen someone's enthusiasm.
신나는 분위기였는데 그의 부정적인 말에 찬물을 끼얹은 격이 되었어요. (Similar to the previous idiom, this often appears in contrastive sentences, not direct cause-effect with -(으)니까.)
InformalEasily Confused
Both endings express a reason or cause.
<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-(으)니까</mark> is generally used when the speaker is stating their subjective reason or a reason that leads to their own decision or action. It's less commonly used to give commands or suggestions. <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-아/어서</mark> is more versatile, can connect sequential events, and is more appropriate for commands and suggestions.
비가 오<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>아서</mark> 집에 갈래요. (Because it's raining, I'll go home. - Suggestion/natural consequence) vs. 비가 오<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>니까</mark> 집에 갈 거예요. (Because it's raining, I will go home. - Speaker's decision based on the rain).
Both express a reason.
<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-기 때문에</mark> is more formal and objective, often used in written language or formal speeches to explain a cause. <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-(으)니까</mark> is more conversational and can carry a more subjective tone. <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-기 때문에</mark> can be used for commands and suggestions more readily than <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-(으)니까</mark>.
시간이 없기 때문에 서둘러야 합니다. (Because there is no time, we must hurry. - Formal) vs. 시간이 없<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>으니까</mark> 빨리 가자. (Because there is no time, let's go quickly. - Conversational).
The ending <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-(으)니까</mark> is sometimes mistaken for a standalone particle or confused with similar-sounding particles.
<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-(으)니까</mark> is always attached to a verb, adjective, or noun stem and functions as a conjunctive ending to link clauses, indicating reason. It is not a standalone particle. For example, '왜?<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>니까</mark>' is incorrect. The correct form would be '왜냐하면...' (Because...)
Correct: 날씨가 좋<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>으니까</mark> 산책해요. Incorrect: 날씨가 좋<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>니까</mark>.
They are closely related in meaning and function.
'-니' is the informal, often shortened version of <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-(으)니까</mark>. It is used in casual conversation between close friends or when speaking to someone younger. <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-(으)니까</mark> is the standard form and can be used in a wider range of situations, including more formal ones.
바쁘<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>니까</mark> 나중에 얘기하자. (Standard, neutral) vs. 바쁘<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>니</mark> 나중에 얘기하자. (Informal, between close friends).
Both <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-(으)니까</mark> and '그러니까' indicate a logical connection or conclusion.
<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-(으)니까</mark> is a conjunctive ending attached to a verb, adjective, or noun stem to form the reason clause. '그러니까' is a conjunctive adverb that means 'therefore' or 'so', and it typically starts a new sentence or clause, referring back to what was just said. It can be used to draw a conclusion based on a previously stated reason.
늦었<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>으니까</mark> 빨리 와. (Because I'm late, come quickly.) vs. 늦었어. 그러니까 빨리 와. (You're late. Therefore, come quickly.)
Sentence Patterns
Verb/Adj Stem + -(으)니까 + Action/Statement
바람이 부<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>니까</mark> 추워요. (Because the wind is blowing, it's cold.)
Noun + -(이)니까 + Action/Statement
저는 학생<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>이니까</mark> 공부해야 해요. (Because I am a student, I must study.)
Past Tense Verb/Adj Stem + -았/었/였 + -(으)니까 + Result
어제 늦게 잤<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>으니까</mark> 오늘 피곤해요. (Because I slept late yesterday, I'm tired today.)
Negation + -(으)니까 + Result
돈이 없<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>으니까</mark> 이걸 살 수 없어요. (Because I don't have money, I can't buy this.)
Verb/Adj Stem + -(으)니까 + Suggestion/Request (used carefully)
시간이 많<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>으니까</mark> 같이 영화 볼래요? (Because we have a lot of time, shall we watch a movie together? - more natural with -아/어서 for suggestions, but possible in some contexts)
Noun + -(이)니까 + Explanation/Justification
이것은 특별한 날<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>이니까</mark> 꼭 참석해주세요. (Because this is a special day, please be sure to attend.)
Verb/Adj Stem + -(으)니까 + Formal Statement
많은 연구가 진행되었<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>으니까</mark> 이 방법이 효과적이라고 판단됩니다. (Because much research has been conducted, this method is judged to be effective.)
Complex Verb/Adj Stem + -(으)니까 + Nuanced Statement
그의 주장은 객관적인 사실에 기반하<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>이니까</mark> 신뢰도가 높다고 볼 수 있습니다. (Because his claim is based on objective facts, its reliability can be seen as high.)
Word Family
Related
How to Use It
Very High
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Using <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-으니까</mark> after a vowel stem.
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Using <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-니까</mark> after a vowel stem.
Forgetting to drop the <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-으</mark> when the stem ends in a vowel or 'ㄹ' is a common error. For example, '가니까' not '가으니까'.
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Using <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-니까</mark> after a consonant stem (other than 'ㄹ').
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Using <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-으니까</mark> after a consonant stem (other than 'ㄹ').
Failing to add the <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-으</mark> before <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-니까</mark> when the stem ends in a consonant like ㄱ, ㄴ, ㅂ, ㅅ, etc. For example, '먹으니까' not '먹니까'.
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Confusing <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-(으)니까</mark> with <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-아/어서</mark> for commands.
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Using <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-아/어서</mark> or <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-기 때문에</mark> for commands/suggestions.
<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-(으)니까</mark> is generally not used for direct commands or suggestions as it often implies a subjective reason. '비가 오<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>니까</mark> 나가!' is unnatural; '비가 오<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>아서</mark> 밖에 나가지 말자.' is better.
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Attaching <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-(으)니까</mark> to past tense stems incorrectly.
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Forming the past tense first, then attaching <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-(으)니까</mark>.
A past reason is expressed by conjugating to the past tense stem first, then adding <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-(으)니까</mark>. For example, '늦었<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>으니까</mark>' not '늦었<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>니</mark>' (unless informal) or trying to attach it directly to a past participle form in an incorrect way.
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Using <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-(으)니까</mark> in very formal writing.
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Using <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-기 때문에</mark> or other formal causal expressions in formal writing.
While <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-(으)니까</mark> can be used in some formal contexts, <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-기 때문에</mark> is generally more appropriate for academic papers, official reports, and highly formal speeches.
Tips
Mastering the Stem
The key to correctly using -(으)니까 is to know the stem of the verb, adjective, or noun and its final sound. Practice identifying stems and applying the rules for -니까 and -으니까 until it becomes automatic.
Understanding Nuance
While -(으)니까 means 'because', its usage can imply a subjective reason or a reason that influences the speaker's decision. Be mindful of this nuance, especially when comparing it to more objective causal connectors like -기 때문에.
Sentence Building
Create your own sentences using -(으)니까. Start with simple reasons and gradually increase complexity. Try explaining why you like a hobby, why you chose a certain path, or why you feel a certain way.
Vs. -아/어서
Actively compare sentences using -(으)니까 and -아/어서 to grasp the subtle differences in their usage, particularly regarding commands and the speaker's perspective.
Active Listening
When watching Korean dramas or listening to podcasts, try to identify instances of -(으)니까. Note down the sentence and try to understand the reason and the resulting action or statement.
Emphasize the 'kk'
Native speakers often slightly emphasize the double 'k' sound in -니까. Practicing this subtle emphasis can make your pronunciation sound more natural.
Build Around It
Learn common phrases that use -(으)니까, such as '시간이 없으니까' or '날씨가 좋으니까'. This will help you see the ending in action and remember its usage.
Connect Your Thoughts
Think of -(으)니까 as a tool to connect your thoughts logically. It helps you explain the 'why' behind your words, making your communication clearer and more persuasive.
Review and Refine
After writing sentences with -(으)니까, reread them to ensure the cause-and-effect relationship is clear and that the chosen ending fits the context and register.
Explain Yourself
Make it a habit to explain your actions or feelings using -(으)니까 in your practice conversations. This will build confidence and fluency.
Memorize It
Mnemonic
Think of 'nikka' as sounding like 'nick a'. Imagine you are 'nick-ing' a reason from a situation to explain why something happened. For example, 'He nicked a reason for being late.' The 'u' in -(u)nika is like a little 'uh' sound you make when you're about to explain something.
Visual Association
Picture a chain link. The first link is the 'reason' (verb/adjective stem), and the second link is the 'result' (the main clause). The -(으)니까 ending is the connector that binds these two links together, showing the cause-and-effect relationship.
Word Web
Challenge
Try creating sentences where you explain why you did something today, why you like a certain food, or why you are learning Korean. Use -(으)니까 to connect your reason and the action/feeling.
Word Origin
The ending -(으)니까 is believed to have evolved from older Korean grammatical structures. It's a contraction and modification of earlier forms that indicated reason or cause.
Original meaning: The core meaning has always been to express a reason or cause, linking two clauses logically.
KoreanicCultural Context
When using -(으)니까 to explain a negative situation, be mindful of how the subsequent action might be perceived. For instance, saying 'I'm tired, so I'm leaving early' is normal. But if the reason is to avoid something unpleasant, phrasing it carefully is important to avoid sounding dismissive or rude.
In English, we often use 'because' at the beginning of a sentence or 'so' to connect clauses. For example, 'Because it's raining, we'll stay inside,' or 'It's raining, so we'll stay inside.' -(으)니까 functions similarly, linking the reason to the outcome.
Practice in Real Life
Real-World Contexts
Explaining why you are doing something.
- 시간이 없으니까 빨리 가야 해요.
- 피곤하니까 오늘은 일찍 잘 거예요.
- 배고프니까 뭐 좀 먹을까요?
Giving reasons for preferences or opinions.
- 이 음식이 맛있으니까 꼭 드셔보세요.
- 이 영화는 재미있으니까 추천해요.
- 저는 한국어를 배우<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>니까</mark> 한국 드라마를 좋아해요.
Making requests or suggestions.
- 날씨가 좋으니까 공원에 갈까요?
- 머리가 아프<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>니까</mark> 조용히 해주세요.
- 이것이 제일 좋은 방법<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>이니까</mark> 이렇게 해봅시다.
Justifying decisions or actions.
- 돈이 없으니까 지금은 못 사요.
- 시간이 많으니까 천천히 할게요.
- 그것은 제 잘못<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>이니까</mark> 사과드립니다.
Describing consequences or natural outcomes.
- 연습을 많이 했<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>으니까</mark> 잘 할 수 있을 거예요.
- 비가 많이 오<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>니까</mark> 길이 미끄러워요.
- 너무 더우<mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>니까</mark> 시원한 음료수를 마셔야겠어요.
Conversation Starters
"오늘 왜 이렇게 기분이 좋아요? 무슨 좋은 일 있었어요? (Why are you in such a good mood today? Did something good happen?)"
"이거 정말 맛있는데, 왜 이렇게 인기가 많은지 알겠어요. (This is really delicious, I understand why it's so popular.)"
"요즘 한국 드라마에 푹 빠졌어요. 너무 재미있어서 시간 가는 줄 몰라요."
"갑자기 비가 오기 시작했어요. 우산이 없는데 어떡하죠?"
"저는 한국어를 배우고 있는데, 생각보다 어렵네요. 그래도 포기하지 않으려고요."
Journal Prompts
오늘 하루 동안 가장 기뻤던 순간은 언제였나요? 그 이유는 무엇이었나요? <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-(으)니까</mark>를 사용하여 설명해보세요.
최근에 무언가를 배우기 시작했다면, 무엇을 배우고 있나요? 왜 그것을 배우기로 결심했는지 <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-(으)니까</mark>를 활용하여 써보세요.
가장 좋아하는 음식에 대해 써보세요. 왜 그 음식을 좋아하는지, 어떤 점이 매력적인지 <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-(으)니까</mark>를 사용하여 설명해보세요.
만약 당신이 어떤 결정을 내려야 한다면, 그 결정을 내린 이유는 무엇인가요? <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-(으)니까</mark>를 사용하여 그 이유를 설명하는 문장을 만들어보세요.
오늘 날씨에 대한 느낌을 써보세요. 날씨 때문에 어떤 기분이 들거나 어떤 행동을 하고 싶은지 <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-(으)니까</mark>를 사용하여 표현해보세요.
Frequently Asked Questions
10 questionsIt depends on the final sound of the verb, adjective, or noun stem. If the stem ends in a vowel or the consonant 'ㄹ', you use -니까. For example, '가다' (to go) becomes '가니까', and '만들다' (to make) becomes '만드니까'. If the stem ends in a consonant other than 'ㄹ', you use -으니까. For example, '먹다' (to eat) becomes '먹으니까', and '좋다' (to be good) becomes '좋으니까'. For nouns, it's -니까 after a vowel (e.g., '친구니까') and -이니까 after a consonant (e.g., '선생님이니까').
Generally, -(으)니까 is not preferred for direct commands or suggestions, especially if the reason is negative. It often implies a subjective reason leading to the speaker's own action or decision. For commands and suggestions, -아/어서 or -기 때문에 are usually better choices. For example, instead of '비가 오으니까 나가!' (Because it's raining, go out!), it's more natural to say '비가 오아서 밖에 나가지 말자.' (Because it's raining, let's not go out.)
Both indicate reason. -(으)니까 often highlights a subjective reason that influences the speaker's decision or action and is less suitable for commands. -아/어서 is more general, can express sequential events, and is more flexible for commands and suggestions. Think of -(으)니까 as explaining 'why I did/will do this' and -아/어서 as stating a cause that naturally leads to an effect or a sequence of events.
Yes, you can. You form the past tense of the verb or adjective first, and then attach -(으)니까. For example, '늦다' (to be late) becomes '늦었-' (past tense stem), and then you attach -으니까 to get '늦었으니까' (because I was late). So, '늦었으니까 빨리 와!' means 'Because I was late, come quickly!'
While -(으)니까 is very common in spoken Korean, in formal writing, -기 때문에 is often preferred for stating reasons. However, -(으)니까 can still be used, especially when the reason is more subjective or directly linked to a decision being explained.
'왜냐하면' is a conjunctive adverb that means 'because' and is typically used at the beginning of a sentence or clause to introduce an explanation, similar to how 'because' can start an English sentence. -(으)니까 is a sentence-ending or clause-connecting grammar form that attaches to the stem of a word. You cannot attach -(으)니까 directly to a sentence starter like '왜냐하면'.
Yes, absolutely. -(으)니까 can be attached to adjective stems just like verb stems. For example, '날씨가 좋으니까 공원에 갈 거예요.' (Because the weather is good, I will go to the park.) or '머리가 아프니까 쉬고 싶어요.' (Because my head hurts, I want to rest.)
Yes, the informal version is -니. It follows similar attachment rules: -니 after vowels and -으니까 after consonants. For example, '배고프니 밥 먹자.' (Because you're hungry, let's eat.) This is used between very close friends or when speaking to someone younger.
-(으)니까 is a grammatical ending that attaches to a word stem to express reason. '그러니까' is a conjunctive adverb meaning 'therefore' or 'so', used to connect sentences or clauses and indicate a conclusion. You can think of it as: 'Reason Clause + -(으)니까 + Result Clause'. Then, 'Result Clause. 그러니까, [Conclusion].'
'때문에' (usually preceded by a noun or a nominalized verb/adjective) means 'because of' or 'due to'. It is generally more formal than -(으)니까 and is often used in writing. -(으)니까 is more common in spoken language and can express a more personal or subjective reason.
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Summary
The Korean ending <mark class='bg-violet-200 dark:bg-violet-800 px-0.5 rounded'>-(으)니까</mark> is essential for expressing causality, functioning like 'because' or 'so' in English. Mastering its conjugation based on the preceding stem is key to natural Korean expression.
- Indicates a reason or cause for the following clause.
- Attaches to verb/adjective stems and nouns based on final sound.
- Similar to English 'because' or 'so'.
- Crucial for explaining actions and decisions.
Mastering the Stem
The key to correctly using -(으)니까 is to know the stem of the verb, adjective, or noun and its final sound. Practice identifying stems and applying the rules for -니까 and -으니까 until it becomes automatic.
Understanding Nuance
While -(으)니까 means 'because', its usage can imply a subjective reason or a reason that influences the speaker's decision. Be mindful of this nuance, especially when comparing it to more objective causal connectors like -기 때문에.
Sentence Building
Create your own sentences using -(으)니까. Start with simple reasons and gradually increase complexity. Try explaining why you like a hobby, why you chose a certain path, or why you feel a certain way.
Vs. -아/어서
Actively compare sentences using -(으)니까 and -아/어서 to grasp the subtle differences in their usage, particularly regarding commands and the speaker's perspective.
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