What are the people saying in the audio? This question makes no sense
yes, it is an infinitive verb
<em>The way I'll answer this question is by writing down the words for each sentence.</em>
monte
tomamos
mandaron
acampaste
<em>second part</em>
visitaron
tomaron
compro
regatio
mandaron
<em>hope this helps!</em>
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!!