Was ist der Unterschied zwischen 끝나다 und 마무리 하다 und 마치다 ?Du kannst auch einfach Beispielsätze geben.

There is slight difference between 끝나다 and 마무리하다. When we say 끝나다 you are not involved in the situation, like someone explain above, we can say 'the movie is over.' When we say 마치다. You are actively involved in the event. Like '나는 학교의 모든과정을 마쳤다(I have finished every curriculum of the school)'. 마무리하다 is a bit different than 마치다. Because the word 마무리하다 is focusing on the final process of the task. If you mess up final process, the task wouldn't finished perfectly. Hence you can say '이번 일 마무리를 잘해서 다른 사람들에게 피해를 주지 말자.' If you switch 마무리 to other words like'마치다(마쳐서). It would be awkward. And please note that 마무리 is a noun.