књигу

In a sentence

• Купио сам нову књигу у књижари.

  I bought a new book at the bookstore.

  Here, 'књигу' is in the accusative case, serving as the direct object of the verb 'купио' (bought). This shows an action is directed toward the book.

• Прочитао сам ту књигу прошле недеље.

  I read that book last week.

  In this example, 'књигу' also appears in the accusative case as the direct object of the verb 'прочитао' (read), indicating that it is the receiver of the action of reading.

• Дечак држи књигу у руци.

  The boy is holding a book in his hand.

  Here, 'књигу' remains in the accusative case functioning as the object being held by the boy.