Korean Object Marker: 을/를

1. What is an Object?

First, what is an "object" in a sentence? The object is the noun that receives the action of the verb.

• In "I eat an apple," the apple is what's being eaten. It's the object.
• In "I read a book," the book is what's being read. It's the object.

In Korean, we use a special particle to clearly mark this noun. This particle is 을/를. Let's watch a short video that introduces this concept.

As the video explained, while English uses word order to identify the object, Korean uses this handy particle.

2. The Rule: 을 for Consonants, 를 for Vowels

Just like with the other particles we've learned, the choice between 을 and 를 depends on the final sound of the noun it's attached to.

• Use 을 (eul) if the noun ends in a consonant (it has a 받침 [batchim]).
• Use 를 (reul) if the noun ends in a vowel (it does not have a 받침).

Let's dig into this rule with a detailed guide.

Let's recap the rule with some vocabulary:

• 책 (chaek, book) ends with the consonant 'ㄱ', so it becomes 책을 (chaeg-eul).
• 영화 (yeonghwa, movie) ends with the vowel 'ㅘ', so it becomes 영화를 (yeonghwa-reul).
• 밥 (bap, rice/meal) ends with the consonant 'ㅂ', so it becomes 밥을 (bab-eul).
• 주스 (juseu, juice) ends with the vowel 'ㅡ', so it becomes 주스를 (juseu-reul).

3. Building Complete Sentences

Now we can put all the pieces together to form complete Subject-Object-Verb (S-O-V) sentences.

Subject + 이/가 + Object + 을/를 + Verb.

For example, to say "Tom eats a lemon," you would structure it as:

• Tom (subject) + eats (verb) + lemon (object) -> English: S-V-O
• Tom (subject) + lemon (object) + eats (verb) -> Korean: S-O-V

This becomes: 톰이 레몬을 먹어요. (Tom-i remon-eul meogeoyo.)

Let's watch a clip that demonstrates how to combine subjects and objects to create full sentences.

Here are some more examples. Notice the S-O-V order.

4. When to Use 을/를 (and When Not To)

A common point of confusion for beginners is knowing when to use the object marker 을/를 versus the subject marker 이/가. The key is to look at the verb.

Action Verbs vs. Adjectives

The object marker 을/를 is used with action verbs (like to eat, to see, to buy) because these actions are done to an object.

Adjectives (descriptive verbs like to be good, to be cute, to be delicious) don't take an object. They simply describe a subject. Therefore, you use the subject marker 이/가 with them.

Let's review this crucial point:

• Correct: 영화를 봐요. (yeonghwa-reul bwayo.) - I watch a movie. (보다, "to watch," is an action verb).

• Incorrect: 영화가 봐요. (This would mean "The movie watches.")

• Correct: 영화가 재미있어요. (yeonghwa-ga jaemiisseoyo.) - The movie is fun. (재미있다, "to be fun," is an adjective describing the subject).

• Incorrect: 영화를 재미있어요.

Conclusion

Congratulations on completing the first module! You've now learned the three essential particles—은/는, 이/가, and 을/를—that form the backbone of Korean sentences. This is a significant accomplishment.

Key Takeaways:

• 을/를 is the object marker. It attaches to the noun that receives the verb's action.
• The rule is: 을 after a consonant, 를 after a vowel.
• These particles are used with action verbs (like 먹다, 보다), not descriptive adjectives (like 좋다, 맛있다).
• You can now construct a complete basic sentence following the Subject-Object-Verb word order.

Next Lesson Preview

Throughout this module, we've been using verbs and adjectives in their informal polite form (e.g., 먹어요, 좋아요, 있어요). But how do we get from the dictionary form (먹다, 좋다, 있다) to this conjugated form?

In our next lesson, we will kick off Module 2 by learning the rules for conjugating Korean verbs and adjectives into the informal polite present tense (the 해요 form). This will unlock your ability to use a vast number of new verbs in your own sentences.