1.Conjugate the verb preferir in all forms in the Present Tense.

2.What takes place in the conjugation that makes this verb a stem-changing verb?

1. The verb preferir, meaning "to prefer," conjugated in the present tense is as follows:

- Yo prefiero (I prefer)
- Tú prefieres (You prefer)
- Él/Ella/Usted prefiere (He/She/You formal prefer)
- Nosotros/Nosotras preferimos (We prefer)
- Vosotros/Vosotras preferís (You all prefer)
- Ellos/Ellas/Ustedes prefieren (They/You all prefer)

2. The conjugation of preferir is considered a stem-changing verb because there is a change in the stem vowel in certain forms of the verb. In the present tense, the stem change occurs in all forms except for the nosotros/nosotras and vosotros/vosotras forms. The stem change is from "e" to "ie."