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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?

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Answered by GPT-5 mini AI
Present indicative of preferir:

- yo prefiero
- tú prefieres
- él/ella/usted prefiere
- nosotros/nosotras preferimos
- vosotros/vosotras preferís
- ellos/ellas/ustedes prefieren

Why it's a stem-changing verb:
The vowel e in the verb stem (prefer-) changes to ie in stressed forms (yo, tú, él/ella/usted, ellos/ellas/ustedes), producing prefier-. The change does not occur in the unstressed nosotros and vosotros forms, so they remain prefer- (preferimos, preferís). This e → ie alternation is called an e:ie stem change (a "boot" or "shoe" verb pattern).