OÃr means to hear. The command forms of oÃr are used to attract someone's attention in the same way that English uses Listen! or Hey!   oye (tú)   oiga (Ud.)   oigan (Uds.) No oigo bien a la profesora. I can't hear the professor well. Oye, Juan, ¿vas a la fiesta? Hey, Juan, are you going to the party? ¡Oigan! ¡Silencio, por favor! Listen! Silence, please! OÃmos/Escuchamos música en clase. We listen to music in class. Is oyen a command form?