dziewczynami

In a sentence

• Spacerowałem z dziewczynami po parku.

  I was walking with the girls in the park.

  The word 'dziewczynami' is used here in its instrumental plural form to denote 'with the girls' as part of a prepositional phrase.

• Dzielę opinie z dziewczynami podczas spotkania.

  I share opinions with the girls during the meeting.

  In this sentence, 'dziewczynami' is again in its instrumental plural form, used to indicate 'with the girls' in the context of the activity.

• Pracuję nad projektem razem z dziewczynami.

  I am working on a project together with the girls.

  Here, 'dziewczynami' functions in the instrumental plural form, specifying the group 'with the girls' in an accompanying role for the action.