Question

español 3 -- pretérito de verbos con cambio de radical (preterite tense - stem - changing verbs)
el pretérito de verbos con los cambios e → i, o → u en la raíz 1 - 5
a. answer the following questions.

1. verbs that were stem - changing verbs in the present tense are not necessarily stem - changing in the preterite.

only verbs that end in - ____ that were stem - changing in the present are stem - changing in the preterite.

1. stem - changing verbs in the preterite change stems only in what forms?

________________________ and ________________________

1. endings for stem - changing verbs are the same as the endings for regular verbs in the preterite. list the endings

endings for - ar verbs endings for - er and - ir verbs
______________ ____________ | ____________ ______________
______________ ____________ | ____________ ______________
______________ ____________ | ____________ ______________
****endings for irregular verbs ________, ______, ________,
______________, ____________, ______________
****irregular verbs have their own set of endings!
stem - changes in the preterite are from e to ______________ and from o to ______________
b. conjugate the following verbs. ****there are a few verbs that are not stem - changing, but regular or irregular.

1. sentirse -- to feel: en ese momento todos los trabajadores ________________ felices.
2. dormir -- to sleep: tú ________________ cinco horas.
3. seguir -- to continue doing something: las señoritas ________________ charlando.
4. mentir -- to lie: nosotros no ________________.
5. mentir -- to lie: él nos ________________.
6. mentir -- to lie: ella te ________________.
7. sugerir -- to suggest: la madre ________________ una idea buena.
8. morir -- to die: sin (without) agua la planta ________________.
9. pedir -- to request: ¿por qué tú no ________________ otro postre?
10. mentir -- to lie: él me ________________.

Explanation:

Section A

1. Only -ir stem-changing present verbs shift in preterite.
2. Stem changes only affect 3rd person singular/plural.
3. Preterite endings match regular verbs; irregulars have unique endings. Stem shifts are e→i, o→u.

Section B

Conjugate using preterite stem changes (e→i, o→u) for -ir verbs, matching subject to correct preterite endings.

Answer:

Section A

1. -ir
2. él/ella/usted; ellos/ellas/ustedes
3. ENDINGS FOR -AR VERBS: -é, -aste, -ó, -amos, -asteis, -aron

ENDINGS FOR -ER AND -IR VERBS: -í, -iste, -ió, -imos, -isteis, -ieron
**Endings for irregular verbs: (varies per verb; e.g., -e, -iste, -o, -imos, -isteis, -ieron for ser/ir; -í, -iste, -o, -imos, -isteis, -ieron for tener)
Stem-changes in the preterite are from e to i and from o to u

Section B

1. se sintieron
2. dormiste
3. siguieron
4. mentimos
5. mintió
6. mintió
7. sugirió
8. murió
9. pediste
10. mintió