realizaban

In a sentence

• Los estudiantes realizaban proyectos interesantes en la clase de ciencias.

  The students were carrying out interesting projects in the science class.

  In this sentence, 'realizaban' is used in the imperfect tense to describe an ongoing activity in the past where students were actively doing projects.

• Antes, los artistas realizaban obras maestras utilizando técnicas antiguas.

  Previously, artists used to create masterpieces using ancient techniques.

  Here, 'realizaban' signifies habitual actions in the past by artists who repeatedly created works of art.

• Durante las festividades, se realizaban eventos culturales para toda la comunidad.

  During the festivities, cultural events were organized for the entire community.

  This usage of 'realizaban' focuses on events that were habitually held in the past as part of a tradition or regular occurrence.