pracownika

In a sentence

• Jestem odpowiedzialny za szkolenie nowego pracownika.

  I am responsible for training the new employee.

  Here, 'pracownika' is used in the Accusative case as the direct object of the verb 'szkolenie'.

• W firmie zatrudniono nowego pracownika.

  A new employee was hired at the company.

  In this sentence, 'pracownika' is in the Accusative form, denoting the direct object of the action 'zatrudniono'.

• Prezentacja była przygotowana przez tego pracownika.

  The presentation was prepared by this employee.

  Here, 'pracownika' appears in the Genitive case, used after 'przez' to indicate the agent of the action.