Verbs - Three classes of verbs

There are three forms for Portuguese verbs: The following three verbs will be used to illustrate the three catergories of regular verbs: Every verb can be thought of as a stem with one of the three possible endings.

Examples
-ar
  • nadar to swim
  • voar to fly
  • mastigar to chew
  • tragar to swallow
-er
  • beber to drink
  • comer to eat
-ir
  • dormir to sleep
  • dirigir to drive
  • rir to laugh
  • sorrir to smile