Core Pattern Rule: Describing Ongoing Actions with -고 있다
This pattern is the Korean equivalent of the English present progressive tense (verb + "-ing"). It's used to express that an action is currently in progress.
Meaning & Usage
Meaning: Indicates that an action is happening right now and is continuing.
When to use: Use it when you want to describe what you or someone else is doing at this very moment. It's the most common way to answer the question "뭐 해?" (What are you doing?).
Formation
Simply attach -고 있다 to the stem of any action verb, regardless of whether it ends in a vowel or a consonant.
먹다 (to eat) → 먹 + 고 있다 → 먹고 있다
가다 (to go) → 가 + 고 있다 → 가고 있다
공부하다 (to study) → 공부하 + 고 있다 → 공부하고 있다
The 있다 part is what gets conjugated for politeness, tense, or other grammatical endings.
밥 먹고 있어. / 공부하고 있어요. / 집에 가고 있어. / 운전하고 있어.
Native Nuance: Ongoing Action vs. General Fact
A common point of confusion for learners is when to use -고 있다 versus the simple present tense (-아/어요). The key is context: are you talking about right now or a general truth/habit?
-고 있다 (Action in Progress)
This form emphasizes that the action is happening at the moment of speaking.
지금 밥 먹고 있어요. means "I am eating right now."
-아/어요 (General Habit or Fact)
This form describes a routine, habit, or a general state of being. It doesn't necessarily mean the action is happening at this exact second.
저는 아침을 먹어요. means "I eat breakfast (in general)." You could say this at 3 PM.
Think of it this way:
Q: 지금 뭐 해요? (What are you doing now?) → A: 일하고 있어요. (I'm working.)
Q: 무슨 일 해요? (What kind of work do you do?) → A: 저는 회사에서 일해요. (I work at a company.)
지금 통화하고 있어. / 나는 보통 저녁에 통화해. / 지금 뭐 해? -> 듣고 있어.
Special Cases: States vs. Actions
While -고 있다 usually describes an ongoing action, it's also used for certain verbs to describe a continuous state. This is especially common with verbs related to wearing things.
Verbs for Wearing
In Korean, you use -고 있다 to say you are wearing something. This describes the state of having an item on your body.
옷을 입고 있다: to be wearing clothes
신발을 신고 있다: to be wearing shoes
안경을 쓰고 있다: to be wearing glasses
모자를 쓰고 있다: to be wearing a hat
Honorific Form: -고 계시다
When the person performing the action is someone you need to show high respect to (like a grandparent, teacher, or boss), 있다 is replaced with its honorific equivalent, 계시다.
아버지가 신문을 읽고 있어요. (My father is reading the newspaper.)
아버지께서 신문을 읽고 계세요. (Honorific version of the same sentence.)
그 사람은 모자를 쓰고 있어요. / 할머니께서 주무시고 계세요. / 선생님은 전화하고 계십니다.
Politeness & Formality
The politeness level of -고 있다 is controlled by conjugating the final verb, 있다. The script lines provide clear examples of switching between casual and polite speech.
Casual Form (반말): -고 있어
Use -고 있어 when talking to close friends, family members you are familiar with, or people younger than you.
Example: 잘하고 있어. (You're doing well.)
Polite Form (해요체): -고 있어요
Use -고 있어요 in most everyday situations. It's the standard polite form for speaking with colleagues, acquaintances, service staff, or anyone you don't know well.
Example: 잘하고 있어요. (You're doing well.)
Notice how only the ending changes, while the core meaning of an ongoing action remains the same.
숨 쉬고 있어. / 숨 쉬고 있어요. / 널 지켜보고 있어. / 지켜보고 있어요. / 기다리고 있어. / 기다리고 있어요.