This is the 2722nd most frequent Korean word.
않는다면
"않는다면" means "if (someone/something) does not."
In this example, '않는다면' is attached to '보호하다' (to protect) as '보호하지 않다' to present a conditional scenario involving environmental conservation and its importance for future safety.
환경을 보호하지 않는다면 미래가 위험해질 것입니다.
If we do not protect the environment, the future will become at risk.
In this sentence, '않는다면' is used after the verb '공부하다' (to study) in its negative form ('공부하지 않다') to express a conditional situation that leads to a consequence.
열심히 공부하지 않는다면 시험에 합격하기 어려울 것입니다.
If you do not study hard, it will be difficult to pass the exam.
Here, '않는다면' follows the verb '이해하다' (to understand) in a negative form ('이해하지 않다'), conveying a hypothetical situation where lack of understanding might lead to an undesired outcome.