Short Answer:
Conjugate the verb preferir in all forms in the Present Tense.
What takes place in the conjugation that makes this verb a stem-changing verb?
The conjugation of the verb preferir in the Present Tense is as follows:
- Yo prefiero (I prefer)
- Tú prefieres (You prefer)
- Él/Ella/Usted prefiere (He/She/You( formal) prefers)
- Nosotros/as preferimos (We prefer)
- Vosotros/as preferís (You all prefer)
- Ellos/Ellas/Ustedes prefieren (They/You all (plural) prefer)
The verb preferir is a stem-changing verb because the stem, which is "prefier-", changes in the present tense for all forms except for the nosotros/as and vosotros/as forms. The change occurs by replacing the -e- in the stem with an -ie-.