격벽에

In a sentence

• 격벽에 삐 소리가 들렸다.

  A beep sound was heard at the partition wall.

  Here, '격벽에' is used to indicate the location where the sound was heard, emphasizing the sense of hearing at the specific partition wall.

• 격벽에 금이 가기 시작했다.

  The partition wall started to crack.

  In this sentence, '격벽에' shows where the action of cracking is occurring, which is on the partition wall.

• 격벽에 손을 대고 두드려 보았다.

  I placed my hand on the partition wall and tried knocking on it.

  Here, '격벽에' indicates the object upon which the action of touching and knocking takes place, referring to the physical interaction with the partition wall.