Korean Particles: 은/는 vs 이/가 (Topic vs Subject Explained with Examples)

Understanding the difference between Korean particles 은/는 and 이/가 is one of the most important steps for mastering Korean sentence structure.

These two particles are often translated as the topic marker and subject marker, but their actual usage depends heavily on context and emphasis in Korean sentences.

If you want to study each particle in detail, you can also explore the complete guide to the Korean topic particle 은/는 and the complete guide to the Korean subject particle 이/가.

In Korean grammar:

complete guide to the Korean topic particle 은/는
complete guide to the Korean subject particle 이/가

은/는 introduces the topic of a sentence and often signals contrast or background information.

이/가 identifies the subject and highlights new or important information.

Because both particles attach to nouns, many Korean learners struggle to decide which one to use in real conversations.

In this guide, you will learn:

• the core difference between 은/는 and 이/가
• common mistakes learners make
• when to use topic vs subject particles
• real Korean sentence examples

Quick Summary: What Is the Difference Between 은/는 and 이/가?

Quick Summary: Korean Particles 은/는 vs 이/가

은/는 sets the topic or context of a sentence and can indicate contrast.
이/가 marks the subject and highlights new or important information.

In simple terms:

은/는 → topic or contrast
이/가 → subject or new information

Example:

저는 학생이에요.
(I am a student.)
→ Topic statement

제가 학생이에요.
(It is me who is the student.)
→ Subject emphasis

This guide explains the difference between the Korean topic particle 은/는 and the subject particle 이/가 with clear explanations, comparison tables, and practical example sentences.

1. Korean Particles 은/는 vs 이/가: Core Difference Explained

Understanding the difference between 은/는 and 이/가 is key to forming natural Korean sentences.

• 은/는 is the Korean topic particle that introduces the topic of a sentence and sometimes shows contrast.
• 이/가 is the Korean subject particle that highlights the subject or presents new information.

1.1 은/는 – Topic Marker

• Introduces the sentence topic or general context.
• Can show contrast between subjects or situations.

Examples:

• 저는 학생이에요. (I am a student.) → Topic / Habit
• 오늘은 날씨가 좋아요. (Today, the weather is nice.) → Topic / Context

1.2 이/가 – Subject Marker

• Highlights the subject or emphasizes new/specific information.
• Used when presenting focus or main action.

Examples:

• 제가 숙제를 다 했어요. (I finished the homework.) → Subject / New Info
• 친구가 집에 왔어요. (A friend came home.) → Subject / Focus

1.3 Combined Usage: Topic + Subject

• Both particles often appear together naturally.
• Structure: Topic sets the context → Subject delivers the main information.

Examples:

• 이 카페는 커피가 맛있어요. (This café has delicious coffee.) → Topic + Subject
• 저는 음악이 좋아요. (I like music.) → Topic + Subject
  
  

What Is the Difference Between 은/는 and 이/가?

은/는 is the Korean topic particle. It introduces the topic of a sentence or shows contrast between subjects.

이/가 is the Korean subject particle. It highlights the subject or presents new information.

In simple terms:

은/는 → topic or contrast
이/가 → subject or new information

If you want to learn more Korean particle contrasts, explore these guides:

→ 에 vs 에서
→ 만 vs 밖에
→ 도 vs 만

2. Core Difference Between Korean Particles 은/는 vs 이/가

The table below shows the key differences between the Korean topic particle 은/는 and the subject particle 이/가.

Particle	Korean Example	English Translation	Function / Explanation
은/는	저는 오늘 아침에 운동했어요.	I exercised this morning.	Topic / Context
은/는	친구는 저녁을 안 먹었어요.	My friend didn’t have dinner.	Topic / Contrast
이/가	오늘 하늘이 맑아요.	The sky is clear today.	Subject / Focus
이/가	새로 온 학생이 질문했어요.	The new student asked a question.	Subject / Emphasis
은/는 + 이/가	저희 집은 고양이가 있어요.	As for our house, there is a cat.	Topic + Subject
은/는 + 이/가	오늘은 커피가 맛있어요.	Today, the coffee is delicious.	Topic + Subject / Contrast + Emphasis

This table summarizes the key differences between the Korean topic particle 은/는 and the subject particle 이/가 with practical example sentences for learners.

📌 Tip: Highlight 은/는 in blue and 이/가 in orange in infographics for visual clarity.

3. How to Use the Korean Topic Particle 은/는

Purpose:

• Introduce or shift the topic
• Highlight contrast
• Give general statements or context

Example Sentences:

1. 저는 매일 아침 달리기를 해요. (I run every morning.) → Topic / Habit
2. 오늘은 회의가 없어요. (Today, there is no meeting.) → Topic / Context
3. 학교에서는 한국어를 배우고 있어요. (At school, I am learning Korean.) → Topic / Setting
4. 저는 커피를 좋아하지만, 친구는 차를 좋아해요. (I like coffee, but my friend likes tea.) → Topic / Contrast
5. 이번 주말은 날씨가 좋을 거예요. (This weekend, the weather will be nice.) → Topic / Context
6. 저희 가족은 모두 건강해요. (My family is all healthy.) → Topic / Context
7. 집에서는 조용히 공부해요. (At home, I study quietly.) → Topic / Setting
8. 저는 여행을 좋아해요. (I like traveling.) → Topic / Focus
9. 이번 시험은 어려웠어요. (This exam was difficult.) → Topic / Contrast
10. 저는 음악이 좋아요. (I like music.) → Topic + Subject
    

📌 Tip: Highlight 은/는 in bold or with a color box in infographics to make it clear it’s a topic marker.

은/는 is commonly used to introduce the topic of a sentence or to show contrast between subjects.

If you want a detailed explanation of how the topic particle works, see the complete guide to the Korean topic particle 은/는.

4. How to Use the Korean Subject Particle 이/가

Purpose:

• Introduce or shift the topic
• Highlight contrast
• Give general statements or context

Examples:

1. 제가 숙제를 다 했어요.
   (I finished the homework.) → Subject / New Info
2. 친구가 집에 왔어요.
   (A friend came home.) → Subject / Focus
3. 책이 재미있어요.
   (The book is interesting.) → Subject / New Info
4. 고양이가 창문에 앉아 있어요.
   (The cat is sitting on the window.) → Subject / Observation
5. 꽃이 예쁘네요.
   (The flower is beautiful.) → Subject / Focus
6. 오늘 날씨가 시원해요.
   (Today, the weather is cool.) → Subject / Info
7. 커피가 너무 뜨거워요.
   (The coffee is too hot.) → Subject / Observation
8. 지갑이 없어요.
   (The wallet is missing.) → Subject / New Info
9. 문이 열려 있어요.
   (The door is open.) → Subject / Observation
10. 아이가 뛰어놀고 있어요.
    (The child is playing.) → Subject / Focus
    

📌 Tip: Highlight 이/가 with a distinct color in infographics to make it clear it’s a subject marker.

이/가 highlights the subject or introduces new information in a sentence.

For a deeper explanation, read the complete guide to the Korean subject particle 이/가.

5. How Native Koreans Actually Use 은/는 vs 이/가

In actual conversations, Topic + Subject structure is very common. Here are 25 categorized examples:

Daily Activities

1. 아침에는 뉴스를 봐요.
   → As for the morning, I watch the news. (은/는: topic/context)
2. 동생이 방에서 숙제를 하고 있어요.
   → My sibling is doing homework in the room. (이/가: subject focus)
3. 오늘은 운동하기 좋은 날이에요.
   → Today is a good day to exercise. (은/는: topic/context)
4. 친구가 저를 기다리고 있어요.
   → My friend is waiting for me. (이/가: subject focus)
5. 저녁에는 가족과 저녁을 먹어요.
   → As for the evening, I eat dinner with my family. (은/는: topic/context)
   

Likes / Dislikes

6. 저는 과일을 좋아해요.
   → I like fruits. (은/는: topic)
7. 동생이 초콜릿을 좋아해요.
   → My sibling likes chocolate. (이/가: subject emphasis)
8. 부모님은 영화를 잘 안 봐요.
   → As for my parents, they rarely watch movies. (은/는: contrast/context)
9. 강아지가 산책을 좋아해요.
   → The dog likes going for walks. (이/가: subject focus)
10. 친구는 맵지 않은 음식을 선호해요.
    → As for my friend, they prefer mild food. (은/는: contrast/context)
    

Existence / Possession

11. 가방 안에 지갑이 있어요.
    → There is a wallet in the bag. (이/가: subject focus)
12. 저는 새 자전거가 있어요.
    → I have a new bicycle. (은/는: topic/context)
13. 집에 강아지가 있어요.
    → There is a dog at home. (이/가: subject focus)
14. 교실에는 컴퓨터가 많아요.
    → As for the classroom, there are many computers. (은/는: topic/context)
15. 가게에 신선한 과일이 있어요.
    → There is fresh fruit in the store. (이/가: subject focus)
    

Contrast / Comparison

16. 저는 책을 읽지만, 동생은 만화를 봐요.
    → I read books, but my sibling reads comics. (은/는: contrast)
17. 오늘은 날씨가 맑지만, 내일은 흐릴 거예요.
    → Today, the weather is clear, but tomorrow it will be cloudy. (은/는: contrast)
18. 오빠는 커피를 마시지만, 저는 차를 마셔요.
    → My older brother drinks coffee, but I drink tea. (은/는: contrast)
19. 친구는 수학을 좋아하지만, 저는 영어를 좋아해요.
    → My friend likes math, but I like English. (은/는: contrast)
20. 부모님은 한국 음식을 좋아하지만, 저는 외국 음식을 선호해요.
    → My parents like Korean food, but I prefer international cuisine. (은/는: contrast)
    

New Info / Specific Emphasis

21. 새로 온 선생님이 소개했어요.
    → The new teacher introduced themselves. (이/가: subject focus)
22. 오늘 친구가 생일 파티를 열었어요.
    → My friend threw a birthday party today. (이/가: subject focus)
23. 동생이 상을 받았어요.
    → It is my sibling who received an award. (이/가: subject emphasis)
24. 새로운 카페가 거리에 생겼어요.
    → A new café opened on the street. (이/가: subject focus)
25. 친구가 저에게 선물을 줬어요.
    → It was my friend who gave me a gift. (이/가: subject emphasis)
    
    

6. Common Mistakes with Korean Particles 은/는 and 이/가

Learning Korean particles 은/는 and 이/가 often leads to misunderstandings, even for motivated learners. This section highlights common points of confusion, explains why they occur, and provides clear examples.

6.1 Misunderstanding 1: Using 은/는 when introducing new information

Misunderstanding:
Learners often use 은/는 to mark a subject, thinking it is always acceptable at the beginning of a sentence.

Example:
오늘은 친구가 왔어요.
(Today, a friend came.)

Explanation:
Here, 오늘은 introduces the context (today) as a topic, while 친구가 marks the new information (the friend who came). Using 은/는 for 친구 instead of 이/가 would incorrectly mark new information as known topic.

6.2 Misunderstanding 2: Confusing subject and topic with objects

Misunderstanding:
Learners sometimes confuse subject markers with object markers, e.g., using 은/는 with the object by mistake.

Example:
책은 읽었어요. vs 책을 읽었어요.
(I read the book.)

Explanation:
책을 is the object, so the correct particle is 을. Using 책은 incorrectly would make it sound like you are contrasting books in general rather than talking about the object you read.

6.3 Misunderstanding 3: Overusing 이/가 to emphasize everything

Misunderstanding:
Thinking that 이/가 should always mark the focus, learners may overuse it, making sentences unnatural.

Example:
강아지가 귀여워요. vs 강아지는 귀여워요.
(The puppy is cute.)

Explanation:
강아지는 introduces the topic (the puppy) naturally. Using 이/가 is only needed when emphasizing that this puppy specifically is cute compared to others.

7. How Context Changes 은/는 vs 이/가 in Korean

In Korean, the choice between 은/는 and 이/가 often shifts depending on context. While 은/는 sets the general topic or indicates contrast, the nuance changes based on what the speaker wants to emphasize.

Examples by Context

1. Introducing new information

• 새 친구가 왔어요. → A new friend came. (이/가 marks the subject)
• 친구는 학교에 갔어요. → As for my friend, they went to school. (은/는 emphasizes context)

2. Contrastive situations

• 저는 커피를 좋아하지만, 친구는 차를 좋아해요. → I like coffee, but my friend likes tea.

3. Shifting focus

• 오늘은 날씨가 좋아요. → Today, the weather is nice. (은/는 marks “today” context, 이/가 highlights “weather”)
  

📌 Tip: Look for which noun the speaker wants to highlight—subject (이/가) or context/contrast (은/는).

8. Using 은/는 vs 이/가 with 있다 and 없다

With 있다/없다, the particle choice strongly affects meaning:

1. Existence / possession

• 책이 있어요. → There is a book. (이/가 marks existence)
• 저는 책이 있어요. → I have a book. (은/는 marks “I” as topic)

2. Contrastive negation

• 저는 돈은 없어요. → As for me, I don’t have money. (emphasizing contrast)
• 돈이 없어요. → There is no money. (simple existence)

3. Shifting emphasis

• 집에 친구가 있어요. → There is a friend at home. (subject focus)
• 집에는 친구가 있어요. → As for the house, a friend is at home. (topic/context focus)
  

📌 Tip: With 있다/없다, always ask: “What am I emphasizing—the existence itself or the topic/context?”

Existence expressions in Korean often use the subject particle 이/가.

To understand this pattern better, read the guide on using 있다 and 없다 in Korean sentences.

9. Comparison Table of Korean Particles: 은/는 vs 이/가 (Topic vs Subject)

To clearly see how 은/는 and 이/가 function differently in Korean sentences, the table below summarizes their roles with fresh example sentences not used in earlier sections.

Particle	Function	Example	English Explanation
은/는	Topic / Context / Contrast	저는 오늘 아침에 운동했어요.	I exercised this morning. (Topic / context)
은/는	Topic / Contrast	친구는 저녁을 안 먹었어요.	My friend didn’t have dinner. (Contrast with “I did eat”)
이/가	Subject / Focus / New Information	오늘 하늘이 맑아요.	The sky is clear today. (Focus on subject)
이/가	Subject / Emphasis	새로 온 학생이 질문했어요.	The new student asked a question. (Emphasizes subject)
은/는 + 이/가	Topic + Subject	저희 집은 고양이가 있어요.	As for our house, there is a cat. (Topic + Subject)
은/는 + 이/가	Topic + Subject / Contrast + Emphasis	오늘은 커피가 맛있어요.	Today, the coffee is delicious. (Topic + Subject with subtle contrast)

Additional Notes for Learners:

• 은/는 introduces the context or topic, sometimes indicating contrast.
• 이/가 highlights the subject or emphasizes new information.
• Using both together is common in natural Korean and helps clarify focus in a sentence.
• For SEO, including “은/는 vs 이/가” in the H2, table captions, and alt text improves snippet visibility.
  
  

10. Practice Quiz: Korean Particles 은/는 vs 이/가

Test your understanding of Korean subject and topic particles with the quiz below. This exercise will help you choose the correct particle based on meaning, not translation.

Practice Quiz (Choose the correct particle)

No.	Sentence	Options
1	저_ 학생이에요.	는 / 가
2	누가 학생이에요? → 제_ 학생이에요.	는 / 가
3	오늘 하늘__ 맑아요.	은 / 이
4	이 카페__ 커피가 맛있어요.	는 / 가
5	우리 강아지__ 아주 귀여워요.	는 / 가
6	누가 문을 열었어요? → 민지__ 열었어요.	는 / 가
7	오늘__ 날씨가 정말 좋아요.	은 / 이
8	새로운 학생__ 질문했어요.	은 / 이
9	저__ 커피를 좋아해요.	는 / 가
10	저희 집__ 고양이가 있어요.	은 / 이

Check Your Answers

Before checking the answers, try to decide based on meaning:

• Is this a topic? → 은/는
• Is this a subject focus? → 이/가

Answers with Quick Logic

1. 저는 학생이에요 → topic introduction
   (I am a student.)
2. 제가 학생이에요 → subject emphasis
   (I am a student – emphasis on the subject.)
3. 오늘 하늘은 맑아요 → topic (weather statement)
   (The sky is clear today – topic-based statement.)
4. 이 카페는 커피가 맛있어요 → topic (about café)
   (This café has good coffee – topic introduction.)
5. 우리 강아지는 귀여워요 → topic
   (Our dog is cute – general topic statement.)
6. 민지가 열었어요 → subject focus
   (Minji opened it – focus on the subject.)
7. 오늘은 날씨가 좋아요 → topic contrast
   (The weather is nice today – topic emphasis/contrast.)
8. 새로운 학생이 질문했어요 → subject
   (A new student asked a question – subject focus.)
9. 저는 커피를 좋아해요 → topic
   (I like coffee – topic statement.)
10. 저희 집에는 고양이가 있어요 → topic (existence)
    (There is a cat in our house – existence statement.)
    
    

11. Frequently Asked Questions About Korean Particles 은/는 and 이/가

Q1: When should I use 은/는 in a sentence?

Use 은/는 to introduce the topic, give context, or show contrast. It sets the stage for what the sentence is about.
Example: 학교는 조용해요. (As for the school, it is quiet.)

Q2: When should I use 이/가 instead of 은/는?

이/가 highlights the subject or new information in a sentence. Use it to emphasize who or what is performing the action.
Example: 고양이가 창문에 있어요. (The cat is on the window.)

Q3: Can 은/는 and 이/가 appear in the same sentence?

Yes. 은/는 introduces the topic or context, while 이/가 emphasizes the main subject. This combination is common in natural Korean.
Example: 오늘은 친구가 생일이에요. (Today, my friend’s birthday is happening.)

Q4: How do 은/는 and 이/가 affect meaning?

은/는 gives context or contrast, and 이/가 emphasizes focus or new information. Switching them can change what part of the sentence feels important.
Example: 날씨는 덥지만, 바람이 시원해요. (The weather is hot, but the wind is cool.)

Q5: What common mistakes do English learners make with these particles?

English learners often mix these particles. Common mistakes include: using 은/는 for new information instead of 이/가 (“The dog came → 동물이 나왔어요”), confusing topic with object (“I made a cake → 케이크를 만들었어요”), or overusing 이/가 in general statements (“The weather is cool → 날씨는 시원하네요”). Check whether you are introducing new information (이/가) or talking about a known topic (은/는).

12. Related Korean Grammar Guides

If you want to clearly understand the difference between Korean topic and subject particles, it is important to compare them with other core particles and meaning-related expressions. These grammar points help you see how sentence focus, contrast, and nuance change in real communication.

👉 Explore more Korean grammar topics in the Related Articles Hub.

📌 Core Grammar Categories

Essential Grammar (Most Important)

• Korean topic particle 은/는 usage guide (topic or contrast)
• Korean subject particle 이/가 usage guide (subject marking)
• Korean object particle 을/를 usage guide (object marking)
• Korean particle “에 vs 에서” comparison guide (location vs action)

Additional Particle Functions

• Additive particle 도 in Korean grammar (also or inclusion)
• Limitation particle 만 in Korean (only or restriction)
• Negative limitation particle 밖에 usage (negative limitation)

👉 Related Articles Hub

13. Conclusion

Understanding the difference between 은/는 and 이/가 is essential for forming natural Korean sentences.

은/는 introduces the topic or context of a sentence, while 이/가 highlights the subject or new information.

In natural Korean conversations, both particles often appear together. Learning how context changes their usage helps learners produce clearer and more natural Korean sentences.

About the Author

Kimchi Master is a native Korean speaker and experienced Korean language educator specializing in teaching Korean grammar to English-speaking learners.

With a strong focus on real-life usage, this blog explains Korean particles, sentence structure, and grammar rules in a clear and practical way.

All lessons are based on how Korean is actually used in daily conversations, helping learners build natural and confident speaking skills.

New Korean grammar guides are added regularly, covering essential topics such as Korean particles, verb endings, and sentence patterns.

To learn more about the author and teaching approach, visit the Author page.