1. Copyright © 2008 Vista Higher Learning. All rights reserved.8.1-1 1 As you learned in Lección 6, -ar and -er stem-changing verbs have no stem change in the preterite. -Ir stem-changing verbs, however, do have a stem change. Study the following chart and observe where the stem changes occur.

2. Copyright © 2008 Vista Higher Learning. All rights reserved.8.1-2 2 Stem-changing -ir verbs, in the preterite only, have a stem change in the third-person singular and plural forms. The stem change consists of either. e to i or o to u

3. Copyright © 2008 Vista Higher Learning. All rights reserved.8.1-3 pedir pedípedimos pediste**** pidiópidieron

4. 8.1-4 morir morímorimos moriste**** muriómurieron

5. Copyright © 2008 Vista Higher Learning. All rights reserved.8.1-5 Cambia cada infinitivo al pretérito. 1.Yo _________. (servir) 2.Usted ____________. (morir) 3.Tú ___________. (conseguir) 4.Ellas ___________. (repetir) 5.Nosotros __________. (seguir) 6.Ustedes __________. (sentirse) 7.Él ____________. (dormir) serví murió conseguiste repitieron seguimos Se sintieron durmió

6. Copyright © 2008 Vista Higher Learning. All rights reserved.8.1-6 servir servíservimos serviste******** sirviósirvieron

7. dormir dormídormimos dormiste******** durmiódurmieron Copyright © 2008 Vista Higher Learning. All rights reserved.8.1-7

8. preferir preferípreferimos preferiste******** prefirióprefirieron Copyright © 2008 Vista Higher Learning. All rights reserved.8.1-8

9. conseguir conseguíconseguimos conseguiste******** consiguióconsiguieron Copyright © 2008 Vista Higher Learning. All rights reserved.8.1-9