Quick answer
Korean particles are short suffixes that mark what each noun does in a sentence — topic, subject, object, destination, location, means. English uses word order; Korean uses particles. Master about a dozen core particles and most everyday grammar follows. The hardest pair is 은/는 (topic) and 이/가 (subject) — learn the difference by function, not by translation.
What Particles Are
A particle attaches to the end of a noun and tells the listener that noun's grammatical role. Because particles carry the roles, Korean word order is flexible — you can often reorder chunks for emphasis without changing the meaning. Particles pick a form based on whether the noun ends in a consonant or a vowel: 은/는, 이/가, 을/를, 으로/로 are consonant/vowel pairs.
The Core Particles
These cover most everyday Korean. Each has a core function and some extended uses you pick up through reading. [VERIFY] — usage nuances vary by textbook.
The 은/는 vs 이/가 Question
This is the particle question every learner asks. The shortcut that helps: think in function, not translation.
은/는 marks the topic — "as for X"
은/는 sets the stage. It says "here is what we are talking about" and often carries known or shared information. It can override 이/가 or 을/를 to put focus on what comes after.
이/가 marks the subject — "it is X that …"
이/가 identifies. It answers "who?" or "what?". It is used for new information, in wh-questions, and with existence and certain predicates (있다, 없다, 좋다, 싫다).
Rule of thumb
If you can replace the word with "as for …", use 은/는. If you are answering or implying "which one? / who?", use 이/가. Existence (있다/없다), likes (좋다/싫다) and certain predicates take 이/가 for their subject.
A Closer Look at 에, 에서, and 으로
에 — destination, time, existence
에서 — place of action, or "from"
A common trap: 에 marks where something exists or where you are going; 에서 marks where an action happens. 회사에 가요 (go to the office) vs 회사에서 일해요 (work at the office).
으로/로 — means, direction, selection
Where Particles Appear in TOPIK
Particles are tested directly and indirectly at every level. At TOPIK I you fill the blank with the correct particle; at TOPIK II questions get subtler — choosing 은/는 vs 이/가 in context, or 에 vs 에서 where both are grammatical but only one fits the meaning. Reading comprehension relies on parsing particles to follow long sentences. [VERIFY] — question styles vary by year.
Common Mistakes
Avoid these
- Using 은/는 and 이/가 by translation. "topic vs subject" only helps if you apply it by function.
- Dropping 을/를. Casual speech often omits it, but in writing and exams the object marker matters.
- Mixing 에 and 에서 for place. 에 = destination/existence, 에서 = place of action.
- Putting 은/는 after a question word. 누가 왔어요? is right; 누는 왔어요? is wrong — question words take 이/가.
- Forgetting the consonant/vowel pair. 학교은 is wrong; it is 학교는 (consonant-final takes 은/은… see rule).
- Translating each particle to an English word. Particles mark role; one-to-one translations mislead.
Key Takeaways
Remember these
- Particles mark grammatical role — Korean uses them where English uses word order.
- 은/는 = topic ("as for …"), 이/가 = subject / identifier ("which one?").
- 에 = destination/time/existence, 에서 = place of action / "from".
- 을/를 = direct object; 으로/로 = means/direction.
- Question words (누구, 무엇, 어디) take 이/가, not 은/는.
Frequently Asked Questions
How many Korean particles are there?
A dozen or so core particles cover most everyday Korean, with several dozen including rarer ones. Learn the core set first and pick up the rest through reading. [VERIFY]
What is the difference between 은/는 and 이/가?
은/는 marks the topic — "as for X" — and often carries known information. 이/가 marks the subject and identifies or answers "who/what?". Existence (있다/없다) and likes (좋다/싫다) take 이/가. When unsure, ask: am I setting a topic, or identifying a subject?
Can I drop particles in casual speech?
Yes — in informal speech, 은/는, 이/가 and 을/를 are often dropped. But keep them in writing, formal speech, and exams, where dropping them is risky.
What is the difference between 에 and 에서?
에 marks a destination, a point in time, or where something exists (집에 있어요 — at home). 에서 marks where an action happens (집에서 공부해요 — study at home) or origin (한국에서 왔어요 — came from Korea).
Which particles appear in TOPIK I?
The core set: 은/는, 이/가, 을/를, 에, 에서, 으로/로, 의, 도, 만, 와/과, 보다, 처럼, 한테/에게. Higher levels add subtler uses and combinations. [VERIFY]