This is the 4814th most frequent Korean word.
공부하고
"Studying and"
Here, '공부하고' is part of the present progressive verb phrase '공부하고 있어요', indicating an ongoing action, which is 'studying'.
나는 도서관에서 공부하고 있어요.
I am studying in the library.
In this sentence, '공부하고' connects two phrases where the speaker describes their study activity and contrasts it with their friend's activity.
나는 수학을 공부하고 친구는 영어를 공부해요.
I study math, and my friend studies English.
The usage of '공부하고' here indicates a sequential action, meaning that studying is completed before the next action, exercising.