#bang youngguk

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)