때문에

In a sentence

• 날씨가 추운 때문에 외출하지 않았어요.

  I didn't go outside because the weather is cold.

  Used to indicate the reason for the action of not going outside, linked to the cold weather condition as cause.

• 그녀는 여행을 할 수 없었어요, 건강 상태 때문이에요.

  She couldn't travel because of her health condition.

  Indicates the noun 'her health condition' as the reason for not being able to travel, showcasing its nominal perspective.

• 시험을 준비해야 하기 때문에 시간을 많이 썼어요.

  I spent a lot of time because I had to prepare for a test.

  Connects the clause 'I had to prepare for a test' to the subsequent action, showing causation between the two.