comencen

In a sentence

• Les classes comencen a les vuit del matí.

  The classes begin at eight in the morning.

  In this sentence, 'comencen' functions as a verb in the present tense, third person plural, indicating the start or beginning of classes.

• Quan comencen les flors a florir, és senyal de la primavera.

  When the flowers start blooming, it's a sign of spring.

  Here, 'comencen' expresses the initiation of an action, in this case, the flowering of plants.

• Els esdeveniments de la festa comencen amb un discurs.

  The events of the party begin with a speech.

  In this example, 'comencen' is used to describe the sequence of events starting at the speech for the party.