Answer:
PABLO: Oscar, voy al centro ahora.
OSCAR: ¿A qué hora piensas volver? El partido de fútbol empieza a las dos.
PABLO: Vuelvo a la una. Quiero ver el partido.
OSCAR: ¿Recuerdas que nuestro equipo es muy bueno? ¡Puede ganar!
Explanation:
For a better understanding, I'll translate the sentences:
PABLO: Oscar, I'm going to the centre now.
OSCAR: What time do you plan to return? The football match starts at two.
PABLO: I'll be back at one. I want to watch the game.
OSCAR: Do you remember that our team is very good? It can win!
These sentences are all written in Present Simple tense and they all have stem-changing verbs. Simple tense is used to express many things, such as routines, things happening now or things that about to happen, and more. Stem-changing verbs are the ones that make regular -ar, -er, -ir verbs undergo a vowel change when conjugated (for example: volver turns into vuelvo when conjugated).
