열고

In a sentence

• 문을 열고 친구를 맞았습니다.

  I opened the door and greeted a friend.

  Here, '열고' is used to indicate the action of opening the door before greeting a friend.

• 책을 열고 공부를 시작했어요.

  I opened the book and started studying.

  In this sentence, '열고' signifies opening the book as the preceding action to studying.

• 창문을 열고 신선한 공기를 들이마셨습니다.

  I opened the window and inhaled fresh air.

  Here, '열고' represents the action of opening the window before taking in fresh air.