The endings are standard -ir verb endings.
Yo-Prefiero
Tu-Prefieres
El/Ella/Usted-Prefiere
Nosotros(as)-Preferimos
Ellos/Ellas/Ustedes-Prefieren
The stem-change is e-ie with the second e (preferir to prefier-). This occurs in all conjugations of the verb but the nosotros(as) form. This is the same with all stem-changing verbs in the present tense.
Hope this helps!!
"Al" is the spanish word equivalent to the english word "to"
To say say "I'm going to play soccer" in Spanish you would say "(Yo) Voy al futbol"
Answer:
I THINK it might be all of the above, because none of those are past tense. I'm not sure though, don't count on me.
Explanation: