못쓰게

In a sentence

• 그 기계는 고장나서 못쓰게 되었다.

  The machine broke and became unusable.

  In this sentence, '못쓰게' indicates a state of being unusable due to damage or malfunction.

• 너는 그렇게 중요한 문서를 못쓰게 만들었니?

  Did you render such an important document unusable?

  Here, '못쓰게' describes an action resulting in the document becoming unusable.

• 이 펜은 잉크가 다 떨어져서 못쓰게 되었어.

  This pen has run out of ink and became unusable.

  In this example, '못쓰게' shows that the pen became unusable due to lack of ink.