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Unit 5: Topic and Subject Markers (은/는, 이/가)

In English, we understand the role of a word based on its position in the sentence. (e.g., "The dog bit the man" vs "The man bit the dog").

In Korean, word order is much more flexible. So, how do we know who is doing what? We use particles! Particles are little tags attached to the end of nouns to indicate their function in the sentence. Today, we will look at the two most common ones.

1. Topic Markers: 은 (eun) / 는 (neun)

The topic marker lets people know what you are talking about or what the main topic of your sentence is. You can think of it as meaning "As for..." or "When it comes to...".

  • Noun ends in a consonant + 은
  • Noun ends in a vowel + 는

Examples: * 저 (jeo - I). Ends in vowel. -> 저 + 는 = 저는 (As for me...) * 내일 (nae-il - tomorrow). Ends in consonant. -> 내일 + 은 = 내일은 (As for tomorrow...)

Topic markers are heavily used to show contrast or to bring up a new topic. For example, if someone asks how the weather is today, you might say: "어제는 비가 왔어요. 오늘은 날씨가 좋아요." (Yesterday it rained. But as for today, the weather is good.)

2. Subject Markers: 이 (i) / 가 (ga)

The subject marker simply indicates the subject of the verb (who or what is doing the action).

  • Noun ends in a consonant + 이
  • Noun ends in a vowel + 가

Examples: * 사과 (sa-gwa - apple). Ends in vowel. -> 사과 + 가 = 사과가 (The apple...) * 책 (chaek - book). Ends in consonant. -> 책 + 이 = 책이 (The book...)

Subject markers are used to emphasize "who" or "what" specifically did the action, rather than just talking about a topic in general.

The Difference: Topic vs Subject

This is one of the hardest concepts for beginners, so don't worry if it takes time to master! Here is a simple shortcut:

은/는 (Topic) emphasizes what comes AFTER it. * 저는 학생이에요. (As for me, I am a student.) -> The focus is on the fact that I am a student.

이/가 (Subject) emphasizes what comes BEFORE it. * 제가 학생이에요. (I am the student.) -> The focus is on the fact that it is ME who is the student, not someone else. (Note: 저 + 가 becomes 제 가).

Summary

  • 은 / 는: Topic marker ("As for..."). Used for general statements, introducing topics, or showing contrast.
  • 이 / 가: Subject marker. Used to point out specifically who or what is doing the action.