Transcript Discussing Past Actions

Discussing Past Actions
Preterite of Stem-Changing Verbs
Preterite of Stem-Changing Verbs
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As you already know, many verbs that are
needed to talk about past actions and activities
are stem-changing verbs
 We already studied that –ar and –er verbs that
stem change in the present tense follow a
normal pattern in the preterite.
 However, -ir verbs that stem change in the
present tense also stem-change in the
preterite but in a different way.
Preterite of Stem-Changing Verbs

e > i pedir
pedí
 pidió
 pedisteis
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pediste
pedimos
pidieron
Preterite of Stem-Changing Verbs

o >u dormir
dormí
dormiste
 durmió
dormimos
 dormisteis durmieron
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Preterite of Stem-Changing Verbs
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In the preterite there are two types of stem
changes: e > i and o > u.
This stem changes occur only in the thirdperson singular and plural forms.
This stem changes are often indicated in
parentheses next to the infinitive:
pedir (i,i); divertirse (ie, i); dormir (ue, u)
The first set of vowels refers to stem changes
in the present tense; the second set to the
stem changes in the preterite.
Preterite of Stem-Changing Verbs
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Only –ir verbs that are stem-changing in the
present tense are also stem-changing in the
preterite.
Here are some common verbs of this type:
1. ie, i verbs: divertirse, preferir, sentirse
2. i,i verbs: despedirse, pedir, repetir, seguir,
servir, vestirse
3. ue, u verbs: dormir, dormirse, morir
Fin de la presentación