pasaron

In a sentence

• Ellos pasaron frente a la tienda sin entrar.

  They passed by the store without entering.

  Here, 'pasaron' is used to indicate the action of passing by a location.

• Durante la charla, muchas cosas pasaron en mi mente.

  During the talk, many things went through my mind.

  In this usage, 'pasaron' expresses the action of something occurring internally, such as thoughts crossing the mind.

• Las horas pasaron rápidamente mientras nos divertíamos.

  The hours went by quickly while we were having fun.

  'Pasaron' here describes the passage of time.