축구

In a sentence

• 나는 매주 친구들과 함께 축구를 합니다.

  I play soccer with my friends every week.

  Here, '축구' is used as a direct object in the sentence, representing the activity of playing soccer.

• 축구 경기를 보면서 응원하는 것이 재미있어요.

  Watching and cheering for a soccer game is enjoyable.

  In this sentence, '축구' describes the type of game being watched, acting as part of the compound noun '축구 경기' (soccer game).

• 어제는 축구 연습을 하느라 많이 뛰었어요.

  Yesterday, I ran a lot because of soccer practice.

  Here, '축구' functions as a descriptor to the noun '연습' (practice), forming the compound noun '축구 연습' (soccer practice), describing the activity practiced.