What is an Object Marker?
In a sentence, the object is the noun that receives the action of a verb. Think of it as the 'what' or 'whom' being acted upon.
In Korean, we use the particle 을/를 to mark this object. It attaches directly to the end of the object noun.
This is a key part of Korean's typical Subject-Object-Verb (SOV) sentence structure. Marking the object clearly helps identify its role, even if the word order changes slightly.
English (SVO): I eat an apple.
Korean (SOV): 저는 사과를 먹어요. (I apple-OBJECT eat.)
Choosing Between 을 and 를
The choice between 을 and 를 is simple and depends on the last sound of the noun it attaches to. This consonant/vowel rule is a fundamental pattern you'll see with many Korean particles.
The Rule
If the noun ends in a... · Use... · Example
Consonant (받침) · 을 · 책 → 책을
Vowel (no 받침) · 를 · 사과 → 사과를
Let's see a few more examples:
Consonant ending: 빵 → 빵 을 먹어요.
Vowel ending: 커피 → 커피 를 마셔요.
When to Use (and Not Use) 을/를
The object marker 을/를 is paired with action verbs . It specifies the target of actions like eating, seeing, reading, or making.
먹다 (to eat) → 밥 을 먹어요.
보다 (to see) → 영화 를 봐요.
However, not every sentence has an object. Sentences describing a state or movement often don't use 을/를 . For example, 'I am going' (저는 가요) or 'The flower is pretty' (꽃이 예뻐요) have no direct object.
Common Beginner Mistake
Avoid using 을/를 with descriptive verbs (adjectives). The object marker is for actions, not descriptions.
❌ Incorrect: 사과 를 예뻐요.
✅ Correct: 사과 가 예뻐요.