Day 5: 은/는 and 이/가

what particles are · topic vs subject · the a/the bridge · contrast · when to just guess · 35 min

The hardest thing in beginner Korean, and the one English gives you no instinct for whatsoever. Advanced learners still get it wrong. Textbooks explain it in one page and leave everyone confused.

So here is the honest structure of today: section 3 gives you a bridge from English that works about 80% of the time, section 4 gives the other main use, and section 6 tells you to stop worrying and keep talking. That last section is not a joke — it is the correct strategy, and skipping it is how people end up silent.

1. What a particle is

English marks a noun's job by where you put it:

The dog bit the man. ≠ The man bit the dog.

Korean marks it with a tag stuck on the end of the noun — so the words can move and the meaning does not.

★ The particle travels with the noun. That is why Korean can put the verb last and shuffle everything else: nothing depends on position.

Today's two, and their forms

⚠️ 저 + 가 = 제가, not 저가. It is the one irregular form and it is very common.

2. What each one actually does

They are not two ways of saying the same thing, and 은/는 is not a subject marker at all — the topic of a sentence often is not its subject.

저는 커피가 좋아요. — "As for me, coffee is good."저는 is the topic (the frame). 커피가 is the subject (the thing that is good).★ Both appear in one sentence, doing different jobs. That is the clearest proof that they are not interchangeable.

3. ★★ The bridge: 이/가 ≈ "a", 은/는 ≈ "the"

This is the most useful thing on this page. It is not exact — but it gets you a long way, and no other analogy comes close.

### 이/가 introduces something NEW. 은/는 refers back to something KNOWN.

Exactly like an English story:

"A dog ran into the room. The dog was enormous."개가 방에 들어왔어요. 그 개는 아주 컸어요.

★ Every language needs a way to say "new here" versus "you already know this one". English does it with a / the in front. Korean does it with 이/가 vs 은/는 behind. Same job, opposite end of the word.

Which is why the answer to a question word takes 이/가

A question word is asking for new information, so the answer is new:

⚠️ 민수는 왔어요 would answer a different question — something like "and what about Minsu?" Never answer 누가 with 은/는.

4. ★ The other big use: contrast

은/는 also means "as for X — as opposed to something else." Often the something else is never even said out loud, and the listener hears it anyway.

★ This is why 저는 is the standard sentence opener — you are setting yourself as the frame, implicitly against everyone else in the room. It is also why saying 저는 in every sentence sounds insistent (Day 4): you keep contrasting yourself with people nobody mentioned.

⚠️ The contrast can be heard when you did not mean it. Ask 커피는 좋아해요? and you may get "…but you don't like tea?" If you mean no contrast, use 이/가 or drop the particle entirely.

5. Patterns to memorise whole

Rather than deriving these every time, learn them as fixed shapes. They cover most of what you will say for the next three weeks.

★ 저는 커피가 좋아요 is the pattern to burn in. It contains both particles doing their real jobs, and it is a sentence you will actually use. (Day 13 goes into it properly.)

6. ★★ And now: stop worrying about it

### Getting this wrong does not stop you being understood. Ever.

Say 저가 학생이에요 with the wrong particle and every Korean in the room knows exactly what you mean. Freeze for four seconds trying to choose, and the conversation dies.

★ The rule for the next twenty-five days:

Use 은/는 when you're talking about yourself or setting a topic. Use 이/가 after a question word, and in 있어요/없어요/아니에요/좋아요. Otherwise guess, and keep going.

⚠️ Native speakers drop particles constantly in casual speech — 밥 먹었어요? (did you eat?) has no particle at all and is completely normal. Dropping is safer than agonising.

★ Accuracy here comes from volume, not from study. You will absorb the difference from hearing thousands of sentences, the same way you absorbed English a and the without ever being taught a rule. Today's job is to know what the two particles are for. Mastery is a year away and that is fine.

7. Dialogue

민수: 알렉스 씨는 학생이에요?Alex: 네, 저는 학생이에요. 민수 씨는요?민수: 저는 개발자예요. … 어? 누가 왔어요?Alex: 친구가 왔어요. 제 친구예요.민수: 아, 네. 이름이 뭐예요?Alex: 사라예요. 사라는 캐나다 사람이에요.민수: 사라 씨도 학생이에요?Alex: 아니요, 사라는 학생이 아니에요. 의사예요.민수: 커피 마셔요?Alex: 저는 커피가 좋아요. 그런데 사라는 차가 좋아요.

★ Watch the particles do their four jobs.① 누가 왔어요? — 친구가 왔어요. — question word → answer takes 이/가.② 친구가 왔어요 introduces her; 사라는 캐나다 사람이에요 refers back. ★ a → the.③ 학생이 아니에요 — the fixed pattern from Day 4.④ 저는 커피가 좋아요. 그런데 사라는 차가 좋아요. — ★ topic + subject together, twice, with the two topics set against each other. That is contrast in action.

8. Exercises

A. 은 or 는? 이 or 가?

1. 학생___ (topic) 2. 커피___ (topic) 3. 이름___ (subject)
2. 친구___ (subject) 5. 저___ (topic) 6. 저___ (subject)

B. ★ New or known? Choose the particle.

1. 남자___ 왔어요. (a man — first mention)
2. 그 남자___ 키가 커요. (the man — we know him)
3. 개___ 있어요. (there's a dog)

C. ★ Answer with the right particle.

1. 누가 왔어요? — 민수___ 왔어요.
2. 뭐가 좋아요? — 커피___ 좋아요.
3. 이름이 뭐예요? — 알렉스___요.

D. Fill in the fixed patterns.

1. 저___ 학생이에요. 2. 저___ 커피___ 좋아요.
2. 친구___ 있어요. 4. 저는 의사___ 아니에요.

E. ⚠️ What extra meaning does 은/는 add here?

1. 커피는 좋아해요.
2. 오늘은 안 가요.
3. 한국어는 조금 해요.

F. ⚠️ Fix the mistake.

1. 저가 학생이에요.
2. 누가 왔어요? — 민수는 왔어요.
3. 저는 학생은 아니에요.
4. 이름은 뭐예요?

9. Today's 10 sentences (flashcards)

1. 저는 학생이에요. — I'm a student
2. 제가 알렉스예요. — I'm Alex (pointing at myself — new info)
3. 누가 왔어요? — Who came?
4. 친구가 왔어요. — A friend came
5. 이름이 뭐예요? — What's your name?
6. 저는 커피가 좋아요. — I like coffee
7. 커피는 좋아해요. — I like coffee (…tea, less so)
8. 오늘은 안 가요. — I'm not going today
9. 저는 학생이 아니에요. — I'm not a student
10. 민수 씨는요? — And you, Minsu?

10. 📲 Upload to LangNote

Upload section 3 (the a/the bridge), section 5 (the fixed patterns) and section 9 → study language Korean.

★ Do not spend more than today on this. Come back to §3 on Day 14 and Day 21 and it will make more sense each time — because by then you will have heard a few thousand sentences, which is the only thing that actually teaches it.

Tomorrow: verbs — 아요/어요, and your first sentences that do something.

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