을/를: Korean Object Particle Explained

을/를 marks the direct object in Korean: the thing an action happens to.

• 밥을 먹어요. → I eat rice.
• 커피를 마셔요. → I drink coffee.
• 한국어를 공부해요. → I study Korean.

The rule itself is simple. The useful part is learning when a Korean sentence actually has an object.

Open the free 을/를 grammar reference while you practice.

을 or 를?

The form depends on batchim:

More examples:

• 물 → 물을 마셔요.
• 영화 → 영화를 봐요.
• 김밥 → 김밥을 먹어요.
• 음악 → 음악을 들어요.

Do not choose the form by meaning. First identify the object, then check whether the noun ends with batchim.

The basic object pattern

A beginner Korean sentence often looks like:

Subject/topic + object + verb

• 저는 책을 읽어요. → I read a book.
• 민지는 한국어를 배워요. → Minji learns Korean.
• 우리는 영화를 봐요. → We watch a movie.

Korean often drops the subject when context already makes it obvious, but the object can remain:

영화를 봐요. → I/you/we watch a movie, depending on context.

When you do not need 을/를

Not every noun before a verb is an object.

Compare:

• 집에 가요. → I go to home. Destination uses 에.
• 집에서 공부해요. → I study at home. Action location uses 에서.
• 책이 있어요. → There is a book. Existence commonly uses 이/가.
• 저는 학생이에요. → I am a student. No direct object.

If you keep adding 을/를 to every noun, the sentence will quickly sound wrong.

Why natives sometimes drop it

In casual conversation, particles disappear when the relationship is obvious:

• 커피 마셔요? → Do you drink coffee? / Are you drinking coffee?
• 뭐 먹어요? → What are you eating?

That does not mean the particle is meaningless. Native speakers can omit it because they already know the structure. Learners usually improve faster by producing the full pattern first.

Common mistakes

1. Using 를 after every noun

Wrong: 책를 읽어요.

Correct: 책을 읽어요.

2. Marking destinations as objects

Wrong: 학교를 가요 when you simply mean “go to school.”

Beginner default: 학교에 가요.

3. Using 을/를 with 있어요

Wrong: 책을 있어요.

Correct: 책이 있어요.

See 있어요/없어요.

Mini practice

Add 을 or 를.

1. 사과__ 먹어요. → 사과를 먹어요.
2. 책__ 읽어요. → 책을 읽어요.
3. 한국어__ 공부해요. → 한국어를 공부해요.
4. 음악__ 들어요. → 음악을 들어요.

Then replace each noun with something from your own life and say the sentence out loud.

Continue the particle cluster

• 은/는 vs 이/가
• Korean particles overview
• 에 vs 에서
• Particle checker
• Grammar library

If you can identify topic, subject, object, and location without translating every word into English, Korean sentence structure becomes much easier.