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.