policjê

In a sentence

• Zadzwoniłem na policję, aby zgłosić wypadek.

  I called the police to report an accident.

  The word 'policję' is used in the accusative singular form as it is the direct object of the verb 'zadzwoniłem' (I called).

• Na miejscu szybko pojawiła się policja.

  The police quickly arrived at the scene.

  Here, 'policja' is in its nominative singular form as it is the subject of the sentence.

• Mam nadzieję, że policja wkrótce znajdzie sprawcę.

  I hope the police will soon find the culprit.

  Similarly to the previous example, 'policja' is in the nominative singular form because it serves as the subject of the verb 'znajdzie' (will find).