Stem Changing Preterite Verbs

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Stem Changing Preterite Verbs
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Review
The stem of a verb is what is left after you have
dropped the ar, -er, -ir.
If you have a stem changing verb, there is a
change only in the stem of the verb. It does NOT
effect the verb endings for each tense.
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A verb that is a stem changer in the present
indicative is not automatically a stem changer in
the preteritesometimes, a verb is a stem
changer in both, or in only one of the two.
Remember, in the present indicative we call them
BOOT verbs.
WHY?
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Pensar (egtie) To Think pienso
pensamos piensas piensa piensan
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Preterite verbs are not called boot verbs because
they change in a different form.
E gt I
Pedir to ask for
pedí
pedimos
pediste
pidió
pidieron
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Since there is no catchy name for these stem
changers, I have come up with my own (thats
always dangerous!)
THONG VERBS
Dormir (ogtue, u) to sleep
dormí
dormimos
dormiste
durmió
durmieron