Things you need to know about Portuguese verbs 

1) Verb endings change according to the person doing the action (the subject) 

There is no word for “it” in Portuguese because everything is considered either masculine (he) or feminine (she)

As a consequence people in Portuguese often omit the subject pronoun. In other words they say "can" (or eat, have, drink, like etc) instead of "we can" (or "they eat", "I have", "she drinks", "you like" etc) because in Portuguese it is superfluous information. You can already tell who is doing the eating, having, doing, drinking and liking etc. just from the verb ending