studenci

In a sentence

• Studenci uczą się na uniwersytecie.

  Students study at the university.

  Here, 'studenci' is the subject of the sentence, referring to a group of individuals who are engaged in academic studies at a university.

• Widziałem studentów w bibliotece.

  I saw students in the library.

  In this sentence, 'studentów' is the plural genitive form of 'studenci', used as the object being observed.

• Czy znasz tych studentów?

  Do you know these students?

  Here, 'tych studentów' refers to specific students in the accusative plural form, as they are the object of the action of knowing.