The film is still rolling: -고 있다

Where the picture shows up in -고 있다

1. 1

   the frame running right now

   지금 밥 먹고 있어요.

   ji-geum bap meok-go i-sseo-yo

   I'm eating right now.

2. 2

   a frame that has not ended

   버스 기다리고 있어요.

   beo-seu gi-da-ri-go i-sseo-yo

   I'm waiting for the bus.

3. 3

   a frame months long

   요즘 한국어를 배우고 있어요.

   yo-jeum han-gu-geo-reul bae-u-go i-sseo-yo

   I'm learning Korean these days.

4. 4

   a frame you wear

   오늘은 안경을 쓰고 있어요.

   o-neu-reun an-gyeong-eul sseu-go i-sseo-yo

   I'm wearing glasses today.

   With 입다 (wear), 쓰다, 신다, 들다, -고 있다 means you have it on, not that you are putting it on. Context decides.

5. 5

   someone else's frame, raised

   사장님이 기다리고 계세요.

   sa-jang-ni-mi gi-da-ri-go gye-se-yo

   The boss is waiting for you.

   To show respect, 있다 becomes 계시다.