If you’re confused about the Korean particles 은/는 and 이/가, you’re not alone. The choice depends on grammar, context, and what the speaker wants to highlight. Three useful patterns can help you get started, but they are not rules that decide every sentence.
은/는 marks a topic or contrast. 이/가 commonly marks the grammatical subject. A topic is what the speaker frames the statement around; the subject is the person or thing described by the predicate. They can overlap, but they are not the same concept.
Use 은 and 이 after a consonant, and 는 and 가 after a vowel. Write the particle directly after the noun, without a space. The examples below use polite speech unless stated otherwise.
Pattern 1: Introduce a topic or identify a subject
은/는 often introduces something you want to say more about. 이/가 is often useful when identifying who or what fills the subject role, such as in an answer to “Who?” It can also appear in neutral descriptions of events or situations, without special emphasis.
| Korean | Translation | Possible context |
|---|---|---|
| 이 사람은 제이슨이에요. | This person is Jason. | You introduce this person and say who he is. |
| 이 사람이 제이슨이에요. | This person is Jason. | You identify which person is Jason. |
| 제이슨은 의사예요. | Jason is a doctor. | You give information about Jason. |
| 제이슨이 의사예요. | Jason is a doctor. | You might be answering “Who is a doctor?” |
| 린다는 선생님이에요. | Linda is a teacher. | You describe Linda. |
| 린다가 선생님이에요. | Linda is the teacher. | You might be identifying the teacher. |
The English articles “a” and “the” do not correspond directly to 은/는 and 이/가. The same Korean sentence can require different English wording in different contexts. The translations above illustrate possible uses, not a fixed article rule.
Here is a classroom example:
- Q: 누가 반장이에요? — Who is the class president?
- A: 민수가 반장이에요. — Minsu is the class president.
- A: 반장은 민수예요. — The class president is Minsu.
Both answers identify Minsu. The first places him in the subject position with 가. The second frames the class president as the topic with 은 and identifies that person in the predicate.
우리 강아지가 제 숙제를 먹었어요. — Our puppy ate my homework. This can answer “Who ate your homework?” It can also simply report what happened.
우리 강아지는 장난감을 좋아해요. — Our puppy likes toys. This gives information about the puppy as the topic.
Thinking about the question being answered is useful. However, “important information before the particle means 이/가, after it means 은/는” is too rigid to work as a universal rule.
Pattern 2: Use 은/는 for contrast
은/는 can contrast people, things, times, or other parts of a sentence. The contrast may be explicit or understood from context.
슈퍼는 여기에서 멀어요. 시장은 가까워요.
The supermarket is far from here. The market is nearby.
영어는 어려워요. 수학은 쉬워요.
English is difficult. Math is easy.
Both compared items can take 은/는. There is no rule requiring the first one to take 이/가. You could also say 영어가 어려워요 to identify English as the difficult subject, then contrast it with 수학은 쉬워요.
그 사람의 옷차림이 재미있어요. 모자는 빨간색이에요. 코트는 보라색이에요. 그리고 바지는 노란색이에요.
That person’s outfit is interesting. The hat is red. The coat is purple. And the pants are yellow.
Here the first sentence introduces the outfit; the following sentences describe its parts, with each item as a topic. A contrasting reading is also possible.
Contrast does not automatically imply that every unmentioned alternative has the opposite quality. For example, 그 여자는 성격은 좋아요 (“As for that woman, her personality is good”) may suggest a contrast with another aspect, but it does not literally mean she has no other good qualities.
Pattern 3: A sentence can have a topic and a separate subject
| Korean | Translation | Topic and subject |
|---|---|---|
| 저는 머리가 아파요. | My head hurts. | 저는: as for me; 머리가: my head, the subject of 아파요. |
| 올해는 태풍이 너무 많았어요. | There were too many typhoons this year. | 올해는: this year, the time frame; 태풍이: typhoons, the subject. |
| 오늘은 날씨가 좋아요. | The weather is nice today. | 오늘은: today; 날씨가: the weather, the subject. |
| 저는 피부가 안 좋아요. | My skin is not in good condition. | 저는: as for me; 피부가: my skin, the subject. |
| 그 여자는 성격이 좋아요. | That woman has a good personality. | 그 여자는: that woman; 성격이: her personality, the subject. |
| 이 식당은 고기 요리가 맛있어요. | The meat dishes at this restaurant are delicious. | 이 식당은: this restaurant; 고기 요리가: the meat dishes, the subject. |
These sentences do not contain “two nouns in the subject.” The first expression sets the topic or frame, while the following subject–predicate combination says something about it.
A topic does not have to correspond to a subject. 사과는 제가 좋아해요 means “Apples, I like” or “As for apples, I like them.” 사과는 is the topic and corresponds to the object of liking; 제가 is the subject.
There is also no automatic switching rule under which contrastive 은/는 forces another noun to take 이/가. For example, 저는 피부는 안 좋아요 is possible with two topic/contrast markers. It may suggest “As for me, my skin at least is not good,” depending on context. That does not assert that everything else about the speaker is good.
Sentences with more than one 이/가-marked noun also exist. Those constructions require their own explanation; the particles do not simply exchange jobs with 은/는.
Conclusion
Start by recognizing three patterns: a topic followed by information about it, a subject identified with 이/가, and contrast expressed with 은/는. Then study whole exchanges to see why a speaker chose one form. No single shortcut captures every use.
For more examples, see Common Korean Particles and Their Functions. Review a few sentences at a time and pay attention to what is already known in the conversation.
REVIEW AND REPEAT DAILY, AND YOU WILL SEE PROGRESS… 화이팅!