고 있다 is added to a verb to indicate that the action is still going on, kinda like adding “ing” to a verb . just remove the 다 from the end of the basic form of the verb and add 고 있다 For Example :
가다 = 가고 있어요
공부하다 = 공부하고 있어요
Example sentences
방용국이 웃고 있어요= Yongguk is smiling
문종업이 춤을 추고 있어요 = Jongup is dancing
정대현이 노래하고 있어요 Daehyun is singing
You can also use it in Past tense form too : ~고 있었어요 its like saying “I was doing____ in the past”
For example: = 나는 내 사업에 신경을 쓰고 있었어요. 그럼 내가 k-pop 을 찾았 어.
(I was minding my own business and then I found k-pop)
