Notice that in Spanish ending are especially important, because very often subject pronouns don’t appear along with the verbs. Look at some examples:
Carmen habla español (Carmen speaks Spanish).
Trabajo en una escuela (I work in an school).
¿Estudias aquí? (Do you study here?)
Cenamos a las 20:00 (We have dinner at 8:00).
Escuchan las noticias en la radio (They listen to the news on the radio).