A2 Particles 16 min read Medium

Topic (은/는) vs Subject (이/가) Distinction

Choose 이/가 for new info and emphasis; choose 은/는 for topics, contrast, and general statements.

Grammar Rule in 30 Seconds

Use 은/는 for topics (what you are talking about) and 이/가 for subjects (who/what did the action).

  • 은/는 sets the topic: 'As for X, ...' (e.g., 저는 학생이에요).
  • 이/가 identifies the subject: 'It is X that...' (e.g., 누가 학생이에요? 제가 학생이에요).
  • Use 은/는 for contrast, use 이/가 for new information.
Topic + 은/는 | Subject + 이/가

Overview

Mastering the distinction between the Korean topic particle 은/는 (eun/neun) and the subject particle 이/가 (i/ga) is a crucial step toward sounding natural and sophisticated. While both can attach to what appears to be the grammatical subject of a sentence, their functions are fundamentally different, signaling distinct types of information to your listener. Understanding this difference is not merely about grammatical correctness; it’s about grasping how Korean speakers conceptualize and present information, influencing flow, emphasis, and nuance.

At an A2 level, you've likely encountered both particles individually, learning their basic roles. 은/는 is often introduced as a marker for the "topic" – what the sentence is generally about. 이/가 is presented as the marker for the "subject" – the entity performing the action or being described.

The challenge arises because the grammatical subject often is the topic. This reference article delves into the pragmatic and grammatical logic governing their use, equipping you with the deeper understanding necessary to navigate their complexities. We will explore the specific contexts where each particle shines, common pitfalls, and how native speakers subtly use them to convey precise meanings.

How This Grammar Works

Korean is often described as a topic-prominent language, meaning the topic of a sentence frequently takes precedence over the grammatical subject in terms of sentence structure and information flow. This is where 은/는 plays its primary role. The topic particle 은/는 (eun/neun) serves to establish what the speaker is talking about, setting the frame or context for the ensuing statement.
It essentially says, "As for X, here's what I want to tell you." This framing can be for general statements, comparisons, or bringing something into focus that is already known or contextually present.
In contrast, the subject particle 이/가 (i/ga) functions primarily as an identifier. It points to the specific entity that performs an action, possesses a quality, or is being newly introduced. When you use 이/가, you're often emphasizing the identity of the subject or highlighting that it is new, unexpected, or the specific one among several possibilities.
Consider it saying, "It is X that does/is this," or "X is specifically the one."
The overlap occurs because the grammatical subject (the doer of the verb) can also be the topic (what the sentence is about). For instance, in 나는 학생입니다 (na-neun haksaeng-imnida - I am a student), (na - I) is both the topic of the conversation and the subject of the verb 입니다 (imnida - am). Your choice of particle here signals whether you are merely stating a fact about yourself (topic) or specifically identifying yourself as the student (subject), perhaps in response to a question like "Who is the student?".
The nuanced difference dictates the naturalness and precision of your Korean.

Formation Pattern

1
Both 은/는 and 이/가 attach directly to nouns, pronouns, and noun phrases. The choice between their forms depends entirely on whether the preceding word ends in a final consonant (batchim) or a vowel.
2
| Particle Type | Ending with Vowel | Ending with Consonant (Batchim) |
3
| :------------ | :---------------- | :------------------------------ |
4
| Topic | (neun) | (eun) |
5
| Subject | (ga) | (i) |
6
Let's look at some examples to illustrate this:
7
사과 (sagwa - apple) ends in a vowel. So, 사과 (sagwa-neun) for topic, and 사과 (sagwa-ga) for subject.
8
(chaek - book) ends in a consonant (ㄱ). So, (chaek-eun) for topic, and (chaek-i) for subject.
9
Pronouns like (jeo - I, humble) end in a vowel, becoming (jeo-neun) or (jeo-ga). However, 저가 is commonly contracted to 제가 (je-ga). Similarly, (na - I, casual) becomes (nae-ga), and (neo - you, casual) becomes (ne-ga).
10
Irregular Forms (Contractions):
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저 + 이/가제가 (je-ga, I)
12
나 + 이/가내가 (nae-ga, I)
13
너 + 이/가네가 (ne-ga, you)
14
무엇 + 이/가뭐가 (mwo-ga, what)
15
It's important to remember these contractions as they are frequently used in spoken and written Korean, reflecting native usage more accurately than their uncontracted forms.

When To Use It

Understanding when to deploy 은/는 versus 이/가 is paramount to natural Korean communication. It boils down to the type of information you are conveying and the emphasis you wish to place.
  1. 1Introducing New Information or Identifying Specifically (이/가)
Use 이/가 when you are introducing a new subject or piece of information for the first time. It highlights the noun as a fresh element in the discourse, often answering an implied "who" or "what" question. This is particularly crucial when the existence of something is being stated.
  • 어제 식당에 손님 많이 왔어요. (eoje sikdang-e sonnim-i mani wasseoyo. - Yesterday, many guests came to the restaurant.) – Here, 손님 (sonnim - guests) are new information; their arrival is the point.
  • 저기 큰 나무 있어요. (jeogi keun namu-ga isseoyo. - There is a big tree over there.) – 큰 나무 (keun namu - big tree) is being introduced into the current perception or discussion.
Furthermore, 이/가 is used for exhaustive listing or specific identification. When you want to state that this specific thing and nothing else fits the description or performs the action, 이/가 is your particle. It implies uniqueness or exclusivity.
  • 누가 창문을 깼어요? (nuga changmun-eul kkaesseoyo? - Who broke the window?)
  • 제 동생 깼어요. (je dongsaeng-i kkaesseoyo. - My younger sibling broke it. [Implying: It was specifically my sibling, not anyone else.])
  • 이것 제일 좋아요. (igeos-i jeil joayo. - This one is the best. [Implying: Among all options, this is the particular one that is best.])
  1. 1Establishing a Topic or Making General Statements (은/는)
은/는 marks a noun as the topic of discussion. This noun is usually something already known, previously mentioned, or generally understood to be the focus. It sets the stage for a statement about that noun.
  • 저는 한국어를 공부해요. (jeo-neun hangugeo-reul gongbuhaeyo. - As for me, I study Korean.) – This establishes (jeo - I) as the topic, making a general statement about my activity.
  • 날씨 좋아요. (nalssi-neun joayo. - As for the weather, it's good.) – The weather is the established context; the statement is about its current state.
It is also used for making general truths or universal statements about a class of things. When you're not identifying a specific instance but speaking broadly, 은/는 is appropriate.
  • 고양이 생선을 좋아해요. (goyangi-neun saengseon-eul joahaeyo. - Cats like fish.) – A general statement about cats as a species.
  • 시간 금이다. (sigan-eun geumida. - Time is gold.) – A proverb or universal truth.
  1. 1Contrast and Comparison (은/는)
One of the most powerful functions of 은/는 is to indicate contrast or comparison. When you are highlighting a difference between two or more things, or drawing attention to a particular aspect in opposition to another, 은/는 is indispensable. You can often translate it as "as for X, but Y...".
  • 커피 마셨는데, 물 안 마셨어요. (keopi-neun masyeonneunde, mul-eun an masyeosseoyo. - I drank coffee, but I didn't drink water.) – Contrasting two actions.
  • 키가 큰데, 동생 키가 작아요. (hyeong-eun ki-ga keunde, dongsaeng-eun ki-ga jagayo. - My older brother is tall, but my younger sibling is short.) – Comparing and contrasting their heights.
Even when only one item is marked with 은/는, an implied contrast can exist. 저는 안 갔어요 (jeo-neun an gasseoyo - As for me, I didn't go) can imply "...but maybe others did." This nuance is subtle but critical.
  1. 1In Relative Clauses and Subordinate Clauses (이/가 is Required)
This is a purely grammatical rule: 은/는 cannot be used within relative clauses (clauses that modify a noun, like "the person who I like") or most other subordinate clauses. In these embedded structures, 이/가 is always required for the subject of the clause.
  • [제가 만든] 음식 ([je-ga mandeun] eumsik - the food that I made) – 제가 is correct inside the modifying clause.
  • [비가 와서] 집에 있었어요. ([bi-ga waseo] jib-e isseosseoyo. - Because it rained, I stayed home.) – 비가 is correct in the subordinate clause expressing cause.
This rule is non-negotiable and helps Korean maintain its grammatical coherence. Using 은/는 here is a clear marker of a non-native speaker and is often ungrammatical.

When Not To Use It

Just as important as knowing when to use each particle is understanding when their use would be inappropriate or unnatural. Misapplying these particles can lead to confusion, unnatural-sounding sentences, or even grammatical errors.
  1. 1Do Not Use 은/는 for New, Unidentified Information:
Attempting to introduce a subject for the very first time using 은/는 will sound awkward because 은/는 presumes prior knowledge or established context. If something is truly novel to the conversation, 이/가 is the correct choice to bring it into focus.
  • Incorrect: 어제 길에서 고양이 한 마리 봤어요. (eoje gil-eseo goyangi-neun han mari bwasseoyo. ✗) – This sounds like you're talking about a cat that was already the topic, not introducing one you just saw.
  • Correct: 어제 길에서 고양이 한 마리 봤어요. (eoje gil-eseo goyangi-ga han mari bwasseoyo. ✓ - Yesterday, I saw a cat on the street.)
  1. 1Avoid Overusing 이/가 for Established Topics or General Statements:
While 이/가 is grammatically permissible in many contexts, constantly using it when 은/는 would establish a topic can make your speech sound choppy, overly emphatic, or even childish. If the subject is already part of the conversation, or if you're making a general statement, 은/는 creates a smoother, more natural flow.
  • Unnatural: 학생입니다. (jeo-ga haksaeng-imnida. ✗ - This sounds like you're correcting someone who thought you weren't a student, rather than a simple introduction.)
  • Natural: 저는 학생입니다. (jeo-neun haksaeng-imnida. ✓ - I am a student. [Simple, general statement about oneself.])
  • Unnatural: 오늘 바빠요. (oneul-i bappayo. ✗ - Sounds like today specifically is busy, implying other days are not, even if that's not your intention.)
  • Natural: 오늘 바빠요. (oneul-eun bappayo. ✓ - As for today, I'm busy.)
  1. 1Never Use 은/는 in Relative Clauses or Subordinate Clauses:
As mentioned, this is a strict grammatical rule. 은/는 simply does not belong inside these embedded structures. Its function is to mark the main topic of an independent clause.
  • Incorrect: [나는 좋아하는] 노래 (na-neun joahaneun norae ✗)
  • Correct: [내가 좋아하는] 노래 (nae-ga joahaneun norae ✓ - the song that I like)
  • Incorrect: [날씨는 좋아서] 기분이 좋아요. (nalssi-neun joh-aseo gibun-i joayo. ✗)
  • Correct: [날씨가 좋아서] 기분이 좋아요. (nalssi-ga joh-aseo gibun-i joayo. ✓ - Because the weather is good, I feel good.)
Recognizing these "do not use" scenarios is as critical as mastering the "when to use it" situations. It helps you avoid common pitfalls that can instantly signal a non-native command of the language.

Common Mistakes

Learners frequently make specific errors when distinguishing 은/는 from 이/가. These mistakes often stem from a direct translation mindset from English, which lacks a clear topic/subject particle distinction, or from an incomplete understanding of their pragmatic functions.
  1. 1Using 은/는 to Introduce New Entities or Events:
This is perhaps the most common mistake. When you first bring up a person, object, or event, it acts as new information. 은/는 assumes the listener already knows what you're talking about or can infer it. Therefore, 이/가 is almost always required for initial introduction.
  • Error: 갑자기 문을 두드리는 사람 있었어요. (gapjagi mun-eul dudeurineun saram-eun isseosseoyo. ✗ - implies the 'person' was already the topic)
  • Correction: 갑자기 문을 두드리는 사람 있었어요. (gapjagi mun-eul dudeurineun saram-i isseosseoyo. ✓ - Suddenly, there was a person knocking on the door.)
  1. 1Omitting 은/는 for Contrast:
When you intend to draw a comparison or highlight a difference, relying solely on 이/가 will typically remove this crucial nuance. 은/는 is the dedicated particle for contrast.
  • Error: 음식 맛있는데 서비스 별로예요. (eumsik-i masinneunde seobiseu-ga byeolloyeyo. ✗ - Grammatically passable, but the contrast isn't explicitly marked, making it sound like two separate, unlinked observations.)
  • Correction: 음식 맛있는데 서비스 별로예요. (eumsik-eun masinneunde seobiseu-neun byeolloyeyo. ✓ - The food is good, but the service isn't [explicitly contrasting the two].)
  1. 1Using 은/는 in Embedded Clauses:
This is a grammatical error. Any noun acting as the subject within a modifying clause (relative clause) or a subordinate clause must take 이/가.
  • Error: [나는 좋아하는] 카페 (na-neun joahaneun kape ✗)
  • Correction: [내가 좋아하는] 카페 (nae-ga joahaneun kape ✓ - the cafe that I like)
  • Error: 그는 [날씨는 추워서] 안 나왔다. (geu-neun [nalssi-neun chuwoseo] an nawatta. ✗)
  • Correction: 그는 [날씨가 추워서] 안 나왔다. (geu-neun [nalssi-ga chuwoseo] an nawatta. ✓ - He didn't come out because the weather was cold.)
  1. 1Misjudging Pragmatic Differences in Self-Reference:
Both 저는... (jeo-neun...) and 제가... (je-ga...) are grammatically correct for "I...". However, their usage signals different intentions.
  • 저는 학생입니다. (jeo-neun haksaeng-imnida. - I am a student.) – A neutral, introductory statement about oneself. 저는 sets the speaker as the topic.
  • 제가 학생입니다. (je-ga haksaeng-imnida. - I am the student. / It is I who is the student.) – This implies emphasis or identification, perhaps correcting a misunderstanding ("Are you the student?" → "Yes, I am."). Using 제가 for a simple self-introduction can sound overly formal or defensive.
These mistakes are common but highly correctable with conscious practice and a deeper understanding of context and intention. Pay close attention to whether you are introducing new information, making a general statement, drawing a contrast, or speaking within an embedded clause.

Common Collocations

Certain phrases and grammatical structures frequently appear with either 은/는 or 이/가, solidifying their roles and providing natural examples for learners. Recognizing these patterns will help you internalize their appropriate usage.
With 은/는 (Topic/Contrast):
  • 저는 ~입니다/예요. (jeo-neun ~imnida/yeyo): The quintessential self-introduction or general statement about oneself. (저는 한국 사람입니다. - I am Korean.)
  • [Noun]은/는 A인데, [Noun]은/는 B예요. ([Noun]-eun/neun A-inde, [Noun]-eun/neun B-yeyo): A common structure for expressing explicit contrast or comparison. (책은 재미있는데, 영화는 지루해요. - The book is interesting, but the movie is boring.)
  • 사실은 ~ (sasil-eun ~): A discourse marker meaning "actually..." or "in fact...". The marks 사실 (fact) as the topic, implying a correction or additional, potentially contrasting, information will follow. (사실은 제가 먼저 왔어요. - Actually, I arrived first.)
  • 그건 (그것은) ~ (geugeon (geugeos-eun) ~): Used to refer to something already established or implied, setting it as the new topic. 그것은 is the full form, 그건 is the common contraction. (그건 정말 중요한 문제예요. - That is a really important problem.)
  • ~에 대해서는 (~-e daehaeseo-neun): "As for/regarding ~." The here marks the topic of discussion. (그 문제에 대해서는 제가 할 말이 많아요. - As for that problem, I have a lot to say.)
With 이/가 (Subject/Identification):
  • [Pronoun]가/이 ([Pronoun]-ga/i): Especially in contracted forms (제가, 내가, 네가), used for identification or emphasis of the pronoun as the subject.
  • 누가 그랬어? → 제가 그랬어요. (nuga geuraesseo? → je-ga geuraesseoyo. - Who did that? → I did it.)
  • ~이/가 아니다 (~-i/ga anida): "Is not ~." 이/가 precedes 아니다 (anida - to not be) to identify what the subject is not.
  • 이것은 사과가 아니에요. (igeos-eun sagwa-ga anieyo. - This is not an apple.)
  • ~이/가 있다/없다 (~-i/ga itda/eopda): "There is/isn't ~" or "to have/not have ~." 이/가 marks the existence or possession of the noun.
  • 시간이 없어요. (sigan-i eopseoyo. - I don't have time / There is no time.)
  • [Modifier]이/가 [Noun] ([Modifier]-i/ga [Noun]): Crucial for subjects of relative clauses. (내가 만든 케이크 - the cake that I made.)
  • ~이/가 되다 (~-i/ga doeda): "To become ~." 이/가 marks the noun that the subject transforms into.
  • 저는 선생님이 되고 싶어요. (jeo-neun seonsaengnim-i doego sipeoyo. - I want to become a teacher.)
By internalizing these common patterns, you can begin to intuitively select the correct particle, as native speakers do, without necessarily dissecting every sentence for its exact grammatical function.

Contrast With Similar Patterns

Beyond 은/는 vs. 이/가, Korean has other particles that can sometimes replace or appear alongside these core markers, each adding its own distinct nuance. Confusing these can lead to misinterpretations.
  1. 1 (do - also/too/even)
The particle (do) implies "also," "too," or "even." Crucially, replaces 은/는 or 이/가 when used. It cannot be used with them simultaneously (저는도 or 제가도 is incorrect).
  • Example 1 (Replacing 은/는):
  • 저는 학생입니다. (jeo-neun haksaeng-imnida. - I am a student.)
  • 학생입니다. (jeo-do haksaeng-imnida. - I also am a student.) – Implies someone else is a student, and the speaker is in addition.
  • Example 2 (Replacing 이/가):
  • 비가 와요. (bi-ga wayo. - It's raining.)
  • 와요. (nun-do wayo. - It's even snowing / It's snowing too.) – Adds an additional element to the weather.
The choice between 은/는 vs. can significantly alter meaning, especially in contrast. 나는 안 가 (na-neun an ga - As for me, I'm not going [perhaps others are]) differs from 나도 안 가 (na-do an ga - I'm also not going [joining others who aren't going]).
  1. 1 (man - only)
Similar to , the particle (man) means "only" or "just" and replaces 은/는 or 이/가. It emphasizes exclusivity.
  • Example 1 (Replacing 은/는):
  • 저는 왔어요. (jeo-neun wasseoyo. - As for me, I came.)
  • 왔어요. (jeo-man wasseoyo. - Only I came.) – Emphasizes that nobody else came.
  • Example 2 (Replacing 이/가):
  • 학생이 저 한 명이에요. (haksaeng-i jeo han myeong-ieyo. - The student is me, one person.)
  • 학생 저 한 명이에요. (haksaeng-man jeo han myeong-ieyo. - Only the student is me, one person. / I'm the only student.) – Highlights the sole identity.
  1. 1께서 (kkeseo - honorific subject particle)
While 이/가 marks the subject, 께서 (kkeseo) is its honorific counterpart, used when the subject of the sentence is a respected elder or superior. It functions identically to 이/가 but adds a layer of politeness and respect.
  • 선생님 오셨어요. (seonsaengnim-i osyeosseoyo. - The teacher came.) – Grammatically correct, but less honorific.
  • 선생님께서 오셨어요. (seonsaengnim-kkeseo osyeosseoyo. - The esteemed teacher came.) – The preferred, honorific way to refer to a teacher's arrival.
It's crucial to use 께서 for honorific subjects to maintain proper social etiquette in Korean. You would never use 은/는 for honorific subjects unless you are specifically drawing a contrast with another respected individual, and even then, 께서 would typically still be present somewhere in the sentence structure or implied.

Quick FAQ

Here are some frequently asked questions that learners have about 은/는 and 이/가.
Q: Can I always just use 이/가 to be safe?

No, absolutely not. While 이/가 is grammatically acceptable in many contexts, overusing it for situations where 은/는 is more natural will immediately mark you as a learner. For instance, saying 저가 학생이에요 instead of 저는 학생이에요 sounds unnatural because it implies an unnecessary emphasis or correction. The topic-setting and contrastive functions of 은/는 are fundamental to natural Korean flow and conveying nuanced meaning. Always strive to use 은/는 for established topics, general statements, and comparisons.

Q: Is there a shortcut rule or mnemonic I can use in the beginning?

For initial guidance, consider these three reliable shortcuts:

  • Inside a relative clause or subordinate clause: Always use 이/가. This is a non-negotiable grammatical rule.
  • When introducing something new or unexpected (especially after adverbs like 갑자기 (gapjagi - suddenly) or 문득 (mundeuk - all of a sudden)): Use 이/가. This highlights the novel information.
  • When you want to contrast two items or ideas (explicitly or implicitly): Use 은/는 for both items. If you only mark one item with 은/는, it still implies a contrast with something unstated.
Q: What about when the subject is clear from context? Can I just omit both?

Yes, absolutely. Korean is a highly contextual language, and particles (including 은/는 and 이/가) are frequently omitted in casual conversation when the meaning is clear. This is especially true for 은/는 when a topic has been firmly established. For example, after introducing yourself with 저는 ~입니다, you might simply say 한국 사람입니다 (I am Korean) in subsequent sentences, omitting 저는 because (I) is the established topic. However, mastering when to omit particles comes with more advanced proficiency; for A2, it's safer to include them correctly.

Q: Does formal (합니다체) vs. casual (해체) speech affect the choice of particle?

The choice between 은/는 and 이/가 is primarily governed by the semantic and pragmatic functions (topic vs. subject, new vs. old information, contrast, etc.), not by the speech formality level. The rules apply equally whether you are speaking formally with 합니다체 (e.g., 저는 한국 사람입니다) or casually with 해체 (e.g., 나는 한국 사람이야). However, some contractions (like 제가, 내가, 네가) are more prevalent in casual speech but are not exclusive to it.

Q: I heard 은/는 is about "what's commonly known" and 이/가 is about "what's unknown." Is that true?

This is a useful simplification, but it's not entirely accurate. 은/는 is more about established or foregrounded information (whether commonly known or newly introduced but now the topic), while 이/가 is more about new or identified information. 이/가 introduces something into the realm of what's being discussed, or identifies it specifically. 은/는 then comments about that established information. While often 이/가 introduces something unknown to the listener, its core function is identification and novelty, not just 'unknownness'. Conversely, 은/는 can mark a topic that might be unfamiliar to the listener if the speaker is about to elaborate on it, making it the topic for discussion. The key is how the information is presented in the discourse, rather than its inherent state of 'known' or 'unknown'.

Particle Attachment Rules

Particle Ending Example Meaning
Consonant
학생은
As for student
Vowel
나는
As for me
Consonant
책이
Book (subject)
Vowel
사과가
Apple (subject)

Common Contractions

Full Short
나는
내가
너는
네가

Meanings

These particles define the role of a noun in a sentence. 은/는 marks the topic or theme, while 이/가 marks the specific subject of a verb or adjective.

1

Topic Marker

Introduces the subject matter of the conversation.

“오늘 날씨는 좋아요.”

“저는 김치를 좋아해요.”

2

Subject Marker

Focuses on the specific actor or state.

“비가 와요.”

“누가 왔어요?”

3

Contrastive Marker

Highlights a difference between two things.

“사과는 먹지만 배는 안 먹어요.”

“한국어는 재미있어요.”

Reference Table

Reference table for Topic (은/는) vs Subject (이/가) Distinction
Form Structure Example
Affirmative
Noun + 은/는
저는 학생입니다.
Subjective
Noun + 이/가
비가 옵니다.
Contrast
Noun + 은/는
커피는 마시지만 차는 안 마셔요.
Question
Noun + 이/가
누가 갔어요?
Identification
Noun + 이/가
제가 할게요.
Generalization
Noun + 은/는
한국어는 어려워요.

Formality Spectrum

Formal
저는 학생입니다.

저는 학생입니다. (Self-introduction)

Neutral
저는 학생이에요.

저는 학생이에요. (Self-introduction)

Informal
나는 학생이야.

나는 학생이야. (Self-introduction)

Slang
나 학생임.

나 학생임. (Self-introduction)

Particle Usage Map

Korean Particles

은/는

  • Topic Theme
  • Contrast Comparison

이/가

  • Subject Actor
  • New Info Focus

Examples by Level

1

저는 학생이에요.

I am a student.

2

이것은 책이에요.

This is a book.

3

날씨가 좋아요.

The weather is good.

4

사과가 맛있어요.

The apple is delicious.

1

저는 한국어를 공부하지만 친구는 영어를 공부해요.

I study Korean, but my friend studies English.

2

누가 왔어요?

Who came?

3

비가 와요.

It is raining.

4

저는 커피는 안 마셔요.

As for coffee, I don't drink it.

1

그 영화는 재미있지만 이 영화는 지루해요.

That movie is fun, but this one is boring.

2

제가 어제 산 옷이 예뻐요.

The clothes I bought yesterday are pretty.

3

한국 음식은 매운 것이 많아요.

Korean food has many spicy things.

4

선생님이 교실에 계세요.

The teacher is in the classroom.

1

제가 찾던 책이 바로 이것입니다.

The book I was looking for is exactly this one.

2

그는 돈은 많지만 행복하지 않아요.

He has a lot of money, but he isn't happy.

3

어제는 비가 왔지만 오늘은 날씨가 맑아요.

It rained yesterday, but today the weather is clear.

4

꽃이 피었습니다.

The flowers have bloomed.

1

그는 성격은 좋으나 일 처리가 미숙하다.

His personality is good, but his work handling is immature.

2

범인이 누구인지가 밝혀졌습니다.

Who the culprit is has been revealed.

3

이 문제는 우리가 해결해야 할 과제입니다.

This problem is the task we must solve.

4

그가 말한 것은 사실이 아닙니다.

What he said is not the truth.

1

바람은 불어도 꽃은 피어난다.

Even if the wind blows, the flowers bloom.

2

그가 그토록 원하던 것이 바로 이것이었나.

Was this really what he wanted so much?

3

지식은 힘이나 지혜는 그보다 더 중요하다.

Knowledge is power, but wisdom is more important than that.

4

어느 누가 이 상황을 이해할 수 있겠는가.

Who could possibly understand this situation?

Easily Confused

Topic (은/는) vs Subject (이/가) Distinction vs 은/는 vs 을/를

Learners mix topic markers with object markers.

Topic (은/는) vs Subject (이/가) Distinction vs 이/가 vs 을/를

Learners mix subject and object markers.

Topic (은/는) vs Subject (이/가) Distinction vs 이/가 vs 은/는

Learners don't know when to switch.

Common Mistakes

나는 사과가 좋아해요.

나는 사과를 좋아해요.

Confusing subject and object markers.

날씨는 좋아요.

날씨가 좋아요.

Using topic instead of subject for descriptive verbs.

누구는 왔어요?

누가 왔어요?

Using topic with question words.

이것은 책이.

이것은 책이에요.

Missing the verb.

저는 한국어는 공부해요.

저는 한국어를 공부해요.

Overusing topic markers.

친구가 밥은 먹었어요.

친구가 밥을 먹었어요.

Incorrect particle for object.

오늘이 날씨가 좋아요.

오늘은 날씨가 좋아요.

Double subject marker usage.

그는 돈이 많지만 행복하지 않아요.

그는 돈은 많지만 행복하지 않아요.

Missing the contrastive nuance.

내가 학교에 가요.

저는 학교에 가요.

Using emphatic 'I' instead of neutral 'I'.

비가 오면은 안 가요.

비가 오면 안 가요.

Redundant particle usage.

그것이 사실은 아닙니다.

그것은 사실이 아닙니다.

Incorrect focus placement.

Sentence Patterns

저는 ___을/를 좋아해요.

___이/가 예뻐요.

___은/는 맛있지만 ___은/는 맛없어요.

제가 ___이/가 된 이유는 ___입니다.

Real World Usage

Ordering food constant

저는 비빔밥이요.

Self-introduction very common

저는 김철수입니다.

Weather report common

오늘 날씨가 좋습니다.

Texting constant

나 밥 먹음.

Job interview common

제 강점은 성실함입니다.

Travel occasional

여기가 어디예요?

💡

The 'As for' Test

If you can translate the sentence as 'As for X...', use 은/는.
⚠️

Don't over-particle

In casual speech, Koreans often drop particles. Don't force them if it sounds robotic.
🎯

New Info Rule

If you are introducing something for the first time, use 이/가.
💬

Politeness

Using the correct particle helps you sound more polite and educated.

Smart Tips

Always use '저는' (Topic) to start.

내가 김철수입니다. 저는 김철수입니다.

Use '날씨가' (Subject) instead of '날씨는'.

오늘 날씨는 좋아요. 오늘 날씨가 좋아요.

Use '제가' (Subject) to emphasize 'I'.

저는 할게요. 제가 할게요.

Use '은/는' for both items.

사과가 맛있지만 배가 맛없어요. 사과는 맛있지만 배는 맛없어요.

Pronunciation

학생은 [학쌩은]

Linking

Particles often link to the preceding noun.

저는↗ 학생이에요.

Intonation

Topic markers often have a slightly higher pitch.

Contrastive

사과는↗ 먹어요.

Implies 'as for apples, I eat them (but not others)'.

Memorize It

Mnemonic

은/는 is the 'Headline' (Topic), 이/가 is the 'Actor' (Subject).

Visual Association

Imagine a stage. The person standing in the spotlight is the Subject (이/가). The background scenery that stays the same is the Topic (은/는).

Rhyme

Topic is 은/는, Subject is 이/가, use them right, and you'll go far.

Story

In a village, the Mayor (Topic) always wears a hat marked '은/는'. He stands still. The children (Subjects) run around with hats marked '이/가'. When you talk about the village, you mention the Mayor first. When you talk about who is running, you mention the children.

Word Web

주제주어

Challenge

Write 5 sentences about your day, alternating between topic and subject markers.

Cultural Notes

Strict adherence to particle usage is expected in formal settings.

Particles are often dropped or changed for emphasis.

Particles are frequently omitted in text messaging.

These particles evolved from ancient Korean case markers.

Conversation Starters

오늘 날씨가 어때요?

누가 한국어를 가르쳐요?

한국 음식은 좋아해요?

이 영화는 어땠어요?

Journal Prompts

Introduce yourself using topic markers.
Describe your favorite season and why.
Compare your hometown with Seoul.
Discuss a recent news event.

Common Mistakes

Incorrect

Correct


Incorrect

Correct


Incorrect

Correct


Incorrect

Correct

Test Yourself

Fill in the correct particle.

저는 학생___.

✓ Correct! ✗ Not quite. Correct answer:
학생 ends in a consonant.
Choose the correct particle. Multiple Choice

오늘 날씨___ 좋아요.

✓ Correct! ✗ Not quite. Correct answer:
Weather is the subject of the state.
Correct the sentence. Error Correction

Find and fix the mistake:

나는 사과가 좋아해요.

✓ Correct! ✗ Not quite. Correct answer: 나는 사과를 좋아해요
Object marker needed.
Reorder the words. Sentence Reorder

Arrange the words in the correct order:

All words placed

Click words above to build the sentence

✓ Correct! ✗ Not quite. Correct answer: 오늘 날씨가 좋아요
Standard word order.
Translate to Korean. Translation

As for me, I am a teacher.

Answer starts with: 저는 ...

✓ Correct! ✗ Not quite. Correct answer: 저는 선생님이에요
Topic marker for 'As for me'.
Match the particle to its function. Match Pairs

Match each item on the left with its pair on the right:

✓ Correct! ✗ Not quite. Correct answer: Topic
은/는 is the topic marker.
Build a sentence. Sentence Building

한국어 / 재미있어요 / 은/는

✓ Correct! ✗ Not quite. Correct answer: 한국어는 재미있어요
Topic marker usage.
Select the correct particle for '사과'. Conjugation Drill

사과___

✓ Correct! ✗ Not quite. Correct answer:
사과 ends in a vowel.

Score: /8

Practice Exercises

8 exercises
Fill in the correct particle.

저는 학생___.

✓ Correct! ✗ Not quite. Correct answer:
학생 ends in a consonant.
Choose the correct particle. Multiple Choice

오늘 날씨___ 좋아요.

✓ Correct! ✗ Not quite. Correct answer:
Weather is the subject of the state.
Correct the sentence. Error Correction

Find and fix the mistake:

나는 사과가 좋아해요.

✓ Correct! ✗ Not quite. Correct answer: 나는 사과를 좋아해요
Object marker needed.
Reorder the words. Sentence Reorder

좋아요 / 날씨가 / 오늘

✓ Correct! ✗ Not quite. Correct answer: 오늘 날씨가 좋아요
Standard word order.
Translate to Korean. Translation

As for me, I am a teacher.

✓ Correct! ✗ Not quite. Correct answer: 저는 선생님이에요
Topic marker for 'As for me'.
Match the particle to its function. Match Pairs

은/는

✓ Correct! ✗ Not quite. Correct answer: Topic
은/는 is the topic marker.
Build a sentence. Sentence Building

한국어 / 재미있어요 / 은/는

✓ Correct! ✗ Not quite. Correct answer: 한국어는 재미있어요
Topic marker usage.
Select the correct particle for '사과'. Conjugation Drill

사과___

✓ Correct! ✗ Not quite. Correct answer:
사과 ends in a vowel.

Score: /8

Practice Bank

13 exercises
Fill in the blank with 은/는 or 이/가 based on context. (This is new info — first mention.) Fill in the Blank

갑자기 고양이___ 들어왔어요.

✓ Correct! ✗ Not quite. Correct answer:
Fill in the blank with 은/는 or 이/가. (This is a contrast: 'work is busy, but health is fine'.) Fill in the Blank

일___ 바쁜데 건강___ 괜찮아요.

✓ Correct! ✗ Not quite. Correct answer: 은/는 for both
Fill in the blank. (Inside a relative clause — pick the correct particle for the subject.) Fill in the Blank

제___ 만든 음식을 드셔 보세요.

✓ Correct! ✗ Not quite. Correct answer:
Translate this sentence choosing the correct particles. Translation

I'm fine, but my friend is having a hard time.

✓ Correct! ✗ Not quite. Correct answer: 저는 괜찮은데 친구는 힘들대요.
Translate using the correct particle to show new information. Translation

A dog suddenly appeared.

✓ Correct! ✗ Not quite. Correct answer: 갑자기 강아지가 나타났어요.
Arrange these words to express 'The movie I watched was boring.' Sentence Reorder

내가 / 본 / 영화가 / 지루했어요

✓ Correct! ✗ Not quite. Correct answer: 내가 본 영화가 지루했어요.
Reorder to express 'Coffee is fine, but tea is even better.' Sentence Reorder

커피는 / 괜찮은데 / 차는 / 더 좋아요

✓ Correct! ✗ Not quite. Correct answer: 커피는 괜찮은데 차는 더 좋아요.
Find and fix the particle error. Error Correction

사실은 제가 모른 사실이에요.

✓ Correct! ✗ Not quite. Correct answer: 사실은 제가 모르는 사실이에요.
Correct the particle misuse. Error Correction

저는 학생이고, 제가 공부를 열심히 해요.

✓ Correct! ✗ Not quite. Correct answer: 저는 학생이고, 저는 공부를 열심히 해요.
Which sentence correctly uses 이/가 for exhaustive identification? Multiple Choice

Someone asks who ate the last cookie. What is the most natural answer?

✓ Correct! ✗ Not quite. Correct answer: 제가 먹었어요.
Which is most natural for introducing a brand new topic in conversation? Multiple Choice

You want to say 'Actually, a problem came up.'

✓ Correct! ✗ Not quite. Correct answer: 사실은 문제가 생겼어요.
Match each particle choice to its grammatical reason. Match Pairs

Match:

✓ Correct! ✗ Not quite. Correct answer: matched
Match each sentence pair to the distinction it illustrates. Match Pairs

Match:

✓ Correct! ✗ Not quite. Correct answer: matched

Score: /13

FAQ (8)

This happens when you have a topic and a subject in the same sentence, e.g., `저는(Topic) 날씨가(Subject) 좋아요`.

Yes, in casual speech, they are often dropped.

Use `저는` for neutral/polite and `제가` when you are the specific subject.

Yes, 은/는 is for topics, 이/가 is for specific subjects.

It depends on the particle attached, not the noun itself.

Use 은 or 이.

Use 는 or 가.

Yes, they are essential in both writing and speaking.

Scaffolded Practice

1

1

2

2

3

3

4

4

Mastery Progress

Needs Practice

Improving

Strong

Mastered

In Other Languages

Japanese high

は/が (wa/ga)

Korean particles change based on consonant/vowel endings, while Japanese particles do not.

English low

Word order / Articles

English has no direct equivalent to the 'topic' marker.

Chinese partial

Topic-comment structure

Chinese uses word order and context, not particles.

German low

Cases (Nominative/Accusative)

German cases are for grammatical function, not discourse function.

Spanish low

Subject pronouns

Spanish lacks a topic marker.

Arabic low

Case endings (I'rab)

Arabic cases are strictly grammatical.

Learning Path

Prerequisites

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