Often / Prone to (-기 일쑤이다)
Grammar Rule in 30 Seconds
Use -기 일쑤이다 to express that someone frequently does a negative or annoying action.
- Attach -기 to the verb stem: 먹다 -> 먹기.
- Follow with 일쑤이다: 먹기 일쑤이다.
- Use it for negative habits only: 지각하기 일쑤이다 (He is always late).
Overview
When you find yourself describing actions that happen frequently, often with an undesirable or repetitive nuance, the Korean grammar pattern -기 일쑤이다 (romanization: -gi ilssuida) becomes indispensable. This B2-level expression captures the essence of something being "prone to," "apt to," or "often happening," particularly when referring to habits, mistakes, or unfortunate occurrences. It allows learners to articulate a recurring negative pattern, implying a sense of inevitability or difficulty in avoiding a specific outcome.
Unlike neutral expressions of frequency, -기 일쑤이다 inherently carries a connotation of slight exasperation, self-criticism, or an observation of an undesirable regularity. It is not used for positive or even neutral habits, making it a powerful tool for expressing shortcomings, persistent problems, or common annoyances. Understanding its specific usage enriches a learner's ability to engage in nuanced discussions about human behavior and situational patterns in Korean.
This pattern fits within the broader chapter of "Inevitability and Close Calls" because it highlights actions that occur with a high degree of predictability due to established patterns, often beyond immediate control. While -기 마련이다 expresses a universal truth or natural consequence and -ㄹ/을 수밖에 없다 denotes a lack of choice, -기 일쑤이다 focuses on recurring, often problematic, actions that have become a regular part of a person's behavior or a situation's dynamic. Mastering it allows you to move beyond simple descriptions of frequency to express a more critical or regretful perspective on recurring events.
How This Grammar Works
저는 매일 운동하기 일쑤예요 (I'm often prone to exercising every day) sounds unnatural because exercising is generally considered a positive habit. Instead, you would use a neutral frequency expression like 저는 매일 운동해요 (I exercise every day) or 저는 매일 운동하는 편이에요 (I tend to exercise every day).그는 약속 시간에 늦기 일쑤입니다 (He is often late for appointments). Here, 늦다 (to be late) is an undesirable action. By using -기 일쑤이다, the speaker conveys not just that he is sometimes late, but that being late is a regular, almost defining, characteristic of his behavior regarding appointments.Formation Pattern
늦다 (to be late) → 늦
잊어버리다 (to forget) → 잊어버리
싸우다 (to fight) → 싸우
실수하다 (to make a mistake) → 실수하
늦 + -기 → 늦기
잊어버리 + -기 → 잊어버리기
일쑤입니다 (formal polite) and 일쑤예요 (standard polite). The casual form 일쑤야 is also common among close friends or in less formal writing. The dictionary form 일쑤이다 itself is rare in spoken language but appears in written explanations.
저는 깜빡 잊어버리기가 일쑤예요. (I'm prone to forgetting things easily.) – emphasizes the act of forgetting.
지각하기가 일쑤인 사람 (A person who is prone to being late.) – used as a modifier.
When To Use It
- 1Describing Negative Habits or Personal Faults: This is the most common application. Use -기 일쑤이다 to acknowledge one's own recurring bad habits or to comment on the undesirable tendencies of others. It carries a sense of self-criticism or observation of a flaw.
저는 아침잠이 많아서 지각하기 일쑤예요.(I'm a heavy sleeper in the morning, so I'm often late.)피곤하면 저도 모르게 실수를 하기 일쑤입니다.(When I'm tired, I'm prone to making mistakes without realizing it.)그 친구는 계획만 세우고 실천하지 않기 일쑤였어요.(That friend used to be prone to just making plans and not acting on them.)
- 1Indicating Undesirable Regular Occurrences in Situations: The pattern can also describe situations or outcomes that happen frequently and are generally seen as problematic or inconvenient. This moves beyond personal habits to comment on the nature of events or systems.
이 앱은 업데이트할 때마다 오류가 생기기 일쑤예요.(This app is prone to errors every time it updates.)손님이 많으면 계산 실수가 나기 일쑤입니다.(If there are many customers, mistakes in calculation are prone to happening.)요즘 날씨가 변덕스러워서 갑자기 비가 오기 일쑤다.(The weather these days is fickle, so it's prone to raining suddenly.)
- 1Expressing Exasperation or Resignation: When something happens so frequently that it becomes frustrating or simply an accepted (though unwelcomed) part of a routine, -기 일쑤이다 effectively conveys this feeling. It implies a pattern that is difficult to change or avoid.
다이어트 한다고 해놓고 야식을 먹기 일쑤네요.(I say I'm on a diet, but I'm prone to eating late-night snacks.) – self-deprecating resignation회의만 하면 의견 충돌이 생기기 일쑤라서 힘들어요.(It's hard because every time we have a meeting, conflicts of opinion are prone to arising.) – exasperation
저는 숙제를 빨리 끝내기 일쑤예요 (I'm prone to finishing homework quickly) because finishing homework quickly is a positive trait.자주 (often) or 늘 (always) paired with neutral verb forms, or patterns like -는 편이다 (tend to), are appropriate.Common Mistakes
- 1Using for Positive or Neutral Actions: This is the most prevalent error. -기 일쑤이다 inherently implies a negative or undesirable action. Applying it to positive habits or neutral occurrences creates an awkward and unnatural sentence.
- Incorrect:
저는 아침에 일찍 일어나기 일쑤예요.(I'm prone to waking up early in the morning.) – Waking up early is usually seen as positive. - Correct Alternative:
저는 아침에 일찍 일어나는 편이에요.(I tend to wake up early in the morning.) - Incorrect:
시험을 잘 보기 일쑤입니다.(I'm prone to doing well on exams.) – Doing well is positive. - Correct Alternative:
시험을 자주 잘 봅니다.(I often do well on exams.)
- 1Confusion with Probability vs. Observed Frequency: Learners sometimes confuse -기 일쑤이다 with -기 십상이다 (romanization: -gi sipsangida), which expresses a high likelihood or ease of something happening. The key difference lies in their focus:
- -기 십상이다: Focuses on probability or tendency for a future outcome. It means "it is likely to happen" or "it is easy for [something] to happen" if certain conditions are met.
이렇게 급하게 하면 실수하기 십상이다.(If you do it this hastily, you're likely to make a mistake.) – Prediction.- -기 일쑤이다: Focuses on observed, recurring frequency of an undesirable event. It means "it happens often" or "one is prone to [something]."
그는 성격이 급해서 실수하기 일쑤예요.(He has a hasty personality, so he's prone to making mistakes.) – Past observation of a pattern.
- 1Confusion with Neutral Habit Expressions: Other patterns like -곤 하다 (romanization: -gon hada) and -는 편이다 (romanization: -neun pyeonida) describe habits or tendencies but lack the negative implication of -기 일쑤이다.
- -곤 하다: Describes a habitual action, either positive, neutral, or negative. It simply means "to do [verb] habitually/often."
저는 주말마다 등산을 가곤 해요.(I habitually go hiking every weekend.) – Neutral.스트레스를 받으면 술을 마시곤 했어요.(When stressed, I used to habitually drink alcohol.) – Potentially negative, but the pattern itself isn't inherently so.- -는 편이다: Expresses a tendency or that something is "on the side of" a certain characteristic, often a softer or more generalized observation.
저는 과묵한 편이에요.(I'm on the quiet side / I tend to be quiet.)우리 팀은 회식을 자주 하는 편이에요.(Our team tends to have company dinners often.)- Contrast:
저는 늦잠을 자곤 해요.(I habitually oversleep.) vs.저는 늦잠을 자기 일쑤예요.(I'm prone to oversleeping.) The latter emphasizes the undesirable frequency more strongly.
- 1Misapplying Tense or Attaching to the Wrong Element: The
이다part of일쑤이다conjugates for tense and politeness, but the일쑤itself describes a persistent state. Therefore, you generally wouldn't conjugate일쑤into a past tense verb stem.
- Awkward:
어제는 너무 피곤해서 잠들었기 일쑤였어요.(Yesterday, I was so tired that I was prone to falling asleep.) – The일쑤describes a general pattern, not a singular past event. - Correct:
어제는 너무 피곤해서 잠들기 일쑤였어요.(Yesterday, I was so tired that I was prone to falling asleep.) – Here, the였어요applies to the overall state of 'being prone to something' in the past. The action itself (잠들기) is still happening with frequency within that past context. - Consider:
그는 어릴 때 거짓말을 하기 일쑤였다.(He was prone to telling lies when he was young.) The -였다 attaches to the이다component, signifying that the state of being prone to lying existed in his youth.
- 1Spelling Confusion: 일쑤 vs. 일수: A minor but common mistake is confusing 일쑤 (common occurrence) with 일수 (romanization: ilsu), which means "number of days" or "daily wage (especially from a loan shark)". Always ensure correct spelling to avoid miscommunication.
돈을 빌려주는 일수(daily wage/loan)시험을 망치기 일쑤(prone to failing exams)
Real Conversations
-기 일쑤이다 is commonly used across various registers in modern Korean, from casual chats to more formal written contexts, provided the inherent negative connotation is suitable. Its adaptability through different conjugations of 이다 allows it to fit naturally into diverse communicative situations.
Casual Conversation / Texting: Often used for self-deprecating humor or complaints among friends.
- A: 요즘 일이 너무 많아서 맨날 밤새는 것 같아. (These days there's so much work, I feel like I'm staying up all night every day.)
- B: 나도 그래. 피곤해서 회의 때 졸기 일쑤야. ㅜㅜ (Me too. I'm so tired that I'm prone to dozing off in meetings. ㅜㅜ)
- 점심만 먹으면 잠 오기 일쑤라서 커피 없이는 못 버텨. (After lunch, I'm prone to feeling sleepy, so I can't last without coffee.)
Workplace / Professional Settings (Verbal or Email): Can be used to discuss recurring issues or challenges, albeit carefully to maintain a professional tone.
- 새 시스템은 아직 불안정해서 갑자기 멈추기 일쑤입니다. (The new system is still unstable, so it's prone to crashing suddenly.)
- 잦은 야근으로 직원들의 피로도가 높아져 실수를 하기 일쑤인 상황입니다. (Due to frequent overtime, employees' fatigue levels are high, leading to a situation where they are prone to making mistakes.)
- 이번 프로젝트는 마감 기한을 넘기기 일쑤였어요. (This project was prone to exceeding its deadline.)
Social Media / Online Forums: People use it to share common experiences, frustrations, or relatable observations.
- 요즘 드라마에 한 번 빠지면 다음 날까지 정주행하기 일쑤지. #드라마폐인 (These days, if I get into a drama, I'm prone to binge-watching until the next day. #dramaholic)
- 나는 스마트폰 배터리가 빨리 닳아서 방전되기 일쑤다. 보조배터리 필수! (My smartphone battery drains quickly, so it's prone to running out. A power bank is essential!)
Narrative / Descriptive Contexts: In more descriptive writing or storytelling, it can paint a picture of a character's habits or an environment's characteristics.
- 그는 길을 걷다 넘어지기 일쑤여서 항상 무릎에 상처가 있었다. (He was prone to falling while walking, so he always had wounds on his knees.)
- 이 지역은 겨울만 되면 눈이 많이 오기 일쑤여서 대중교통 이용이 어려웠다. (This area was prone to heavy snowfall every winter, making public transportation difficult to use.)
In all these examples, observe how -기 일쑤이다 consistently points to a recurring, often unwelcome, event that has become an established pattern. The specific nuance can range from mild self-deprecation to a more serious acknowledgement of a problem, but the underlying sense of regular, undesirable occurrence remains constant.
Quick FAQ
피곤하기 일쑤이다 (prone to being tired). If you want to express frequent tiredness leading to an action, you would link them: 피곤해서 잠들기 일쑤예요 (I'm tired, so I'm prone to falling asleep).자주, 늘, or patterns like -는 편이다.지각하기 일쑤예요 - being prone to being late is a fault). When describing external situations, it might imply a systemic problem or an unfortunate regularity rather than direct blame (e.g., 시스템이 멈추기 일쑤입니다 - the system is prone to crashing, implying a problem with the system).그는 약속 시간에 늦기 일쑤예요, it means he has often been late, and therefore you expect him to be late in the future.일쑤입니다 (합니다체), in standard polite settings with 일쑤예요 (해요체), or in casual conversations with 일쑤야 (해체).Formation Table
| Verb Stem | Nominalizer | Pattern | Result |
|---|---|---|---|
|
지각하
|
기
|
일쑤이다
|
지각하기 일쑤이다
|
|
실수하
|
기
|
일쑤이다
|
실수하기 일쑤이다
|
|
잊어버리
|
기
|
일쑤이다
|
잊어버리기 일쑤이다
|
Meanings
This pattern indicates that a specific action, usually undesirable, happens very frequently or is a habitual tendency.
Negative Habit
Expressing frustration or observation of a recurring bad habit.
“숙제를 잊어버리기 일쑤이다.”
“말을 바꾸기 일쑤이다.”
Reference Table
| Form | Structure | Example |
|---|---|---|
|
Affirmative
|
V-기 일쑤이다
|
그는 늦기 일쑤이다.
|
|
Past
|
V-기 일쑤였다
|
그는 늦기 일쑤였다.
|
|
Polite
|
V-기 일쑤예요
|
그는 늦기 일쑤예요.
|
Formality Spectrum
그는 지각하기 일쑤입니다. (Talking about a friend.)
그는 지각하기 일쑤예요. (Talking about a friend.)
그는 지각하기 일쑤야. (Talking about a friend.)
걔 맨날 늦어. (Talking about a friend.)
Usage Map
Context
- 불만 complaint
- 부정적 negative
Examples by Level
그는 늦기 일쑤이다.
He is always late.
나는 실수를 하기 일쑤이다.
I often make mistakes.
그는 약속을 어기기 일쑤이다.
He often breaks promises.
그는 중요한 순간에 긴장하기 일쑤이다.
He tends to get nervous at important moments.
그는 자신의 잘못을 남 탓으로 돌리기 일쑤이다.
He is prone to blaming others for his own mistakes.
그는 현실을 도피하기 일쑤이다.
He is prone to escaping reality.
Easily Confused
Both describe habits.
Common Mistakes
공부하기 일쑤이다
공부하기 좋아한다
먹기 일쑤이다
자주 먹는다
일하기 일쑤이다
일하곤 한다
웃기 일쑤이다
잘 웃는다
Sentence Patterns
그는 ___하기 일쑤이다.
Real World Usage
나 또 늦기 일쑤야 ㅠㅠ
Check the tone
Smart Tips
Use -기 일쑤이다 to sound more natural.
Pronunciation
Linking
The 'ㄱ' in '기' and '일' often blend smoothly.
Complaining
지각하기 일쑤예요↓
Falling intonation shows frustration.
Memorize It
Mnemonic
Think of '일쑤' as 'one-soo' (one mistake). If you do it 'one-soo' (one mistake) again and again, it's a bad habit!
Visual Association
Imagine a person constantly dropping their phone. Every time it hits the floor, a sign pops up saying '일쑤!'
Rhyme
Always late, that's the rule, -기 일쑤이다, don't be a fool.
Story
Min-su was always forgetting his keys. His mom sighed, 'Min-su, you are forgetting your keys again!' Min-su replied, 'I know, I am 잊어버리기 일쑤예요.'
Word Web
Challenge
Write 3 sentences about a bad habit you have using this pattern.
Cultural Notes
Used to describe colleagues who consistently miss deadlines.
Derived from '일' (work/matter) and '쑤' (a suffix for frequency).
Conversation Starters
요즘 자주 하는 실수가 있어요?
Journal Prompts
Common Mistakes
Test Yourself
그는 매일 ___.
Score: /1
Practice Exercises
1 exercises그는 매일 ___.
Score: /1
Practice Bank
12 exercises숙제를 안 가져오면 선생님께 혼나기 ___.
일쑤예요 / 잃어버리기 / 자주 / 우산을
Which verb stem fits best with `...기 일쑤이다`?
늦게 자서 아침에 피곤하기 일수예요.
Match context to result.
길이 미끄러워서 ___ 일쑤였다.
Select the correct sentence:
이름을 헷갈리기 일쑤예요.
그는 항상 정시에 도착하기 일쑤이다.
물건을 잃어버리___ 일쑤이다.
일쑤이다 / 자주 / 계획이 / 바뀌기
Context: Your computer crashes frequently.
Score: /12
FAQ (1)
Yes, you can say '나는 늦기 일쑤예요' to admit a flaw.
Scaffolded Practice
1
Mastery Progress
Needs Practice
Improving
Strong
Mastered
In Other Languages
~がちだ
Japanese uses it for states, Korean for actions.
tender a
Korean is strictly negative.
neigen zu
Korean is more colloquial.
avoir tendance à
Korean implies annoyance.
总是
Korean is specific to bad habits.
كثيرًا ما
Korean is specific to bad habits.
Learning Path
Prerequisites
Related Grammar Rules
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