아니어서

In a sentence

• 그것은 사실이 아니어서 놀랐어요.

  It wasn't true, so I was surprised.

  In this sentence, "아니어서" is used to express the reason for being surprised, forming a cause-and-effect relationship with the preceding clause meaning "not true."

• 우리는 비가 아니어서 밖에 나갈 수 있었어요.

  It wasn't raining, so we were able to go outside.

  Here, "아니어서" indicates that the lack of rain facilitated the action of going outside, showing a contrasting situation.

• 기계가 작동하지 않아서 우리가 작업을 못 했어요.

  The machine wasn't working, so we couldn't do the work.

  This uses "아니어서" to explain the machine's non-functionality as the reason for the inability to complete the work.