ceny

In a sentence

• Ceny w sklepie są bardzo wysokie.

  The prices in the store are very high.

  Here, 'ceny' is used in its plural nominative form, referring to 'prices' in general.

• Nie znam ceny tego produktu.

  I do not know the price of this product.

  In this case, 'ceny' is used in its singular genitive form, indicating the price of a specific item.

• Porównałem ceny w różnych sklepach.

  I compared prices in different stores.

  Here, 'ceny' is in its plural accusative form, referring to the act of comparison involving 'prices.'