porzeczki

In a sentence

• Porzeczki są moim ulubionym owocem.

  Currants are my favorite fruit.

  Here, 'porzeczki' refers to the fruit{'s name' in its plural form, used as the subject of the sentence.

• Mama upiekła pyszny tort z porzeczkami.

  Mom baked a delicious cake with currants.

  In this case, 'porzeczkami' is the instrumental plural form, denoting the ingredient used in the cake.

• W ogrodzie posadziłem krzewy porzeczek.

  I planted currant bushes in the garden.

  Here, 'porzeczek', the genitive plural form is used in reference to the bushes of currants.