What Is the Korean Object Particle?
The Korean object particle is the small word 을 or 를 that follows the noun a verb acts on. It answers the question "what?" for verbs like eat, read, buy, see and meet. The choice depends on the last sound of the noun: use 을 after a consonant (책을, "the book") and 를 after a vowel (사과를, "the apple").
A single sentence shows the pattern. 저는 사과를 먹어요 (jeoneun sagwareul meogeoyo) = "I eat an apple." The word 사과 ends in a vowel, so it takes 를. The verb 먹어요 closes the sentence.
Speakers shorten 를 in conversation. 뭐를 먹어요? becomes 뭘 먹어요? ("What are you eating?"), and 나를 becomes 날. Both forms are correct, and the short form is more casual. For the larger family of particles, see Korean particles.
What Is the Difference between 을/를, 이/가 and 은/는?
을/를 marks the thing acted on, 이/가 marks the subject, and 은/는 marks the topic. One noun can take any of the three, depending on its role in the sentence. The table uses the noun 사과 (apple).
| Particle | Role of 사과 | Example | Meaning |
|---|---|---|---|
| 를 | object | 사과를 먹어요. | I eat an apple. |
| 가 | subject | 사과가 있어요. | There is an apple. |
| 는 | topic or contrast | 사과는 좋아해요. | As for apples, I like them. |
Learning these three together prevents most early mistakes. The next section shows where to begin.
Where Should You Start with the Korean Object Particle?
Start with the object particle 을/를, then learn the exceptions with 좋아하다 and 좋다, then the motion verbs. The first lesson teaches the form and the basic rule, so the other two lessons assume you have it.
- The rule (A1): object particle 을/를.
- The most common exception (A2): 좋아하다 vs 좋다 particles.
- Motion verbs (A2): motion verbs particle 을/를 vs 에.
The most common first mistake in this set is using 을/를 after 좋다, 싫다 or 있다. These verbs describe states and take 이/가 on the thing, as in 사과가 좋아요 and 책이 있어요. Learning the rule and its edges in this order avoids that mistake. The three lessons are described below.
Browse the Object Particle Lessons
Each lesson has examples, audio, a pattern table, common mistakes and practice with answers.
Object Particle 을/를
The 을/를 lesson teaches how to choose 을 or 를, how to build a sentence with a subject, an object and a verb, and how 을/를 differs from 은/는 and 이/가. It also shows when speakers drop the particle and when they keep it.
좋아하다 vs 좋다 Particles
This lesson explains why 커피를 좋아해요 (I like coffee) uses 를 while 커피가 좋아요 (coffee is good, or I like coffee) uses 가. The difference is a verb (to like) against a description (to be good), and the same split applies to 싫어하다 and 싫다.
Motion Verbs Particle 을/를 vs 에
The motion-verbs lesson shows how verbs of movement choose between 에 and 을/를. Verbs such as 가다 and 오다 usually take 에 with a destination (학교에 가요), while verbs such as 건너다 (to cross) and 떠나다 (to leave) take 을/를 on the place (길을 건너요, 서울을 떠나요).
Once you know the three lessons, the decision guide helps when you have a sentence to check.
Which Lesson Fits Your Sentence?
Choose the lesson by the verb in your sentence. The table pairs a verb type with an example and the lesson that explains it.
| Your verb | Example | Particle | Open this lesson |
|---|---|---|---|
| Ordinary action (eat, read, buy) | 책을 읽어요. | 을/를 | Object particle 을/를 |
| Like / dislike a thing | 커피를 좋아해요. | 를 | 좋아하다 vs 좋다 |
| Be good / be unpleasant | 커피가 좋아요. | 가 | 좋아하다 vs 좋다 |
| Go, come, arrive somewhere | 학교에 가요. | 에 | Motion verbs |
| Cross, leave, pass a place | 길을 건너요. | 을/를 | Motion verbs |
Read the table by asking: does my verb act on a thing, describe a state, or move through space? Action verbs take 을/를, state verbs take 이/가, and motion verbs split. For the other particle sets, return to Korean particles.
How Do You Practise the Korean Object Particle?
Practise the Korean object particle with the particles quiz, the flashcard deck and the printable worksheet. Try the Korean particles quiz after the first lesson. Review pairs with the Korean particles flashcards, and print the Korean particles worksheet for writing practice.
A good routine is to write five sentences with five different action verbs, mark the object in each, and check the 을 or 를 choice by the last sound of the noun. An honest limit: this hub summarises the three lessons and does not teach each rule in full. Honorific and written-style variations are covered in later grammar lessons.
Frequently Asked Questions
Does every object need 을/를?
No. Spoken Korean often drops 을/를 when the meaning is clear: 밥 먹었어요? instead of 밥을 먹었어요?. Writing, formal speech and careful sentences keep it. Drop it only after you can place it correctly, because dropping the wrong particle leaves the sentence ambiguous, especially when there are two nouns.
Why do some verbs take 이/가 instead of 을/를?
Verbs that describe a state, such as 좋다 (be good), 싫다 (be unpleasant) and 있다 (exist), do not act on a thing, so the noun is the subject of a state and takes 이/가. 책이 있어요 means "there is a book". Verbs of action, such as 읽다, take 을/를 on the thing acted on.
Which lesson in the object particle set should I read first?
Read the object particle 을/를 lesson first, because it teaches the form and the basic rule. Then read 좋아하다 vs 좋다 to learn the most common exception, and finish with motion verbs, where the choice between 을/를 and 에 depends on the verb. All three lessons build on each other.
Why does 뭘 appear instead of 뭐를?
In speech, 뭐를 is shortened to 뭘. The particle 를 contracts to ㄹ and attaches to the vowel before it. The same happens in 나를 → 날, and in 이것을 → 이걸 via the spoken form 이거를. The short form is common in conversation and informal writing, while formal writing keeps the full 뭐를.
What level is the Korean object particle?
The core rule, 을 after a consonant and 를 after a vowel, is A1 and appears in the first sentences learners write. The special cases with 좋아하다 vs 좋다 and with motion verbs are A2, since they need vocabulary and sentence patterns that come after the basics.