наставника

In a sentence

• Упитала сам наставника за додатно објашњење.

  I asked the teacher for further explanation.

  Here, "наставника" is used in the accusative case to denote the object of the action, referring to the teacher being asked.

• Наставника често видимо на школском игралишту.

  We often see the teacher on the school playground.

  In this sentence, "наставника" is also in the accusative case, identifying the teacher as the direct object of seeing.

• Ова је књига за наставника.

  This is a book for the teacher.

  Here, "наставника" appears in the dative case (used to denote the recipient or beneficiary in this context), referring to the teacher who is the intended recipient of the book.