때문에

때문에

"Because of" or "due to."

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

시험을 준비해야 하기 때문에 시간을 많이 썼어요.

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

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

그녀는 여행을 할 수 없었어요, 건강 상태 때문이에요.

She couldn't travel because of her health condition.

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

날씨가 추운 때문에 외출하지 않았어요.

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