grali

In a sentence

• Oni grali w piłkę nożną na boisku.

  They were playing football on the field.

  The word 'grali' is the past tense, third person plural form of 'grać,' meaning 'to play.' It describes an action done by multiple people in the past.

• Dzieci grali na gitarach podczas lekcji muzyki.

  The children were playing guitars during the music class.

  Here 'grali' refers to the same past tense plural form, indicating an activity participants engaged in during a specific time in the past.

• Czy widziałeś, jak oni grali w szachy w parku?

  Did you see how they were playing chess in the park?

  In this case, 'grali' again indicates the past indefinite activity of a group engaging in the activity of playing chess.