없나

In a sentence

• 준비가 아직 없나?

  Is the preparation still not done?

  Here, '없나' is used to question the absence of preparation, inquiring about its current status.

• 마침표를 놓고 없나?

  Did you forget to add the full stop?

  In this sentence, '없나' implies questioning whether something expected (a full stop) is missing.

• 주변에 편의점은 없나?

  Is there no convenience store around?

  This usage of '없나' questions the absence of convenience stores in the area.