Korean - Object Markers

The Korean Object Marker is a grammatical particle used to identify the Direct Object of the verb in a sentence. It marks the noun that is directly affected by the action of the verb.

The particle has two forms: 을 (eul) and 를 (reul).

1. Forms and Usage

The choice between 을 and 를 depends on whether the preceding noun ends in a consonant (a batchim) or a vowel:

Noun Ends In...	Use This Form	Example	Meaning
Consonant	을 (eul)	책을 (chaek-eul)	The book (is the object)
Vowel	를 (reul)	커피를 (keopi-reul)	The coffee (is the object)

2. Core Function of the Object Marker

The primary function of the object marker (을/를) is to clearly identify the noun that is receiving the action of a transitive verb (a verb that requires a direct object).

In Korean's Subject-Object-Verb (SOV) structure, the object precedes the verb, and the object marker clarifies its role.

• Example 1:

  • 저는 사과를 먹어요.
  • Jeo-neun sagwa-reul meogeoyo.
  • I eat an apple.
  • (The action of "eating" is applied to "apple.")

• Example 2:

  • 학생들은 한국어를 공부해요.
  • Haksaeng-deul-eun hangugeo-reul gongbuhaeyo.
  • The students study Korean.
  • (The action of "studying" is applied to "Korean.")

• Example 3 (Simple Command):

  • 창문을 닫으세요.
  • Changmun-eul dadeuseyo.
  • Please close the window.
  • (The action of "closing" is applied to "window.")

3. Contractions in Spoken Korean

In casual or rapid spoken Korean, the object marker is often omitted or contracted, especially 를 following a vowel.

• Contraction (often only used with Vowel-ending nouns):

  • Original: 커피를 마시다 (To drink coffee)
  • Spoken: 커피 마시다

• Omission:

  • Original: 뭐를 해요? (What are you doing?)
  • Spoken: 뭐 해요?

Note: While contractions and omissions are common in speech, it is best practice to always include the correct 을/를 when writing or speaking formally to ensure clarity and grammatical correctness.

Summary Table of Core Particles

Particle	Form(s)	Function	Example
Topic Marker	은/는	Introduces the Topic or provides Contrast.	저는 학생이에요. (As for me, I am a student.)
Subject Marker	이/가	Marks the Subject (who/what performs the action).	커피가 맛있어요. (The coffee is delicious.)
Object Marker	을/를	Marks the Direct Object (who/what receives the action).	책을 읽어요. (I read a book.)