ze

In a sentence

• Idę do sklepu ze znajomym.

  I'm going to the store with a friend.

  In this sentence, 'ze' is a prepositional form used before the word 'znajomym' to indicate accompaniment and requires a specific grammatical form due to euphonious reasons.

• Rozmawiałem z nauczycielem ze szkoły.

  I talked with the teacher from the school.

  Here, 'ze' serves as a prepositional form used preceding the word 'szkoły' due to phonetic and syntactic compatibility, meaning 'from the school'.

• Jestem zadowolony ze swojego wyboru.

  I am content with my choice.

  In this sentence, 'ze' is a preposition modifying 'swojego wyboru' to convey a causal relation, meaning 'with regard to' in this context.