The verb "preferir" (to prefer) is a stem-changing verb in the present tense. Its conjugation is as follows:
- Yo prefiero
- Tú prefieres
- Él/Ella/Usted prefiere
- Nosotros/Nosotras preferimos
- Vosotros/Vosotras preferís
- Ellos/Ellas/Ustedes prefieren
In the conjugation, the stem "prefer-" changes to "prefier-" in all forms except for "nosotros" and "vosotros." This change occurs in the present tense, making it a stem-changing verb (specifically, an e:ie change).