Preterit Stem Changing
Yasmin, Tenzin, Gaby
What is a preterit stem changing verb?
It is a verb in the past tense that has stem changes. One letter
changes to another in the usted and ustedes conjugation of a
verb.
Example: Sentir
Yo Senti
Tu Sentiste
El/ Ella/ Usted Sintio
Nosotros Sentimos
Ellos/ Ellas/ Ustedes Sintieron
As you can see from the example, the ending of
the verbs are the same as preterit tense. The only
thing that changes is the e-i in the usted and
ustedes form.
Yo Dormi
Tu Dormiste
El/ Ella/ Usted Durmio
Nosotros Dormimos
Ellos/ Ellas/ Ustedes Durmieron
It isn’t always e that changes to an i. In the verb dormir, the preterit conjugation is as follows:
Destruir
Yo Destrui
Tu Destruiste
El/ Ella/ Usted Destruyo
Nosotros Destruimos
Ellos/ Ellas/ Ustedes Destruyeron
The verbs that have preterit stem- changing are all –IR verbs, but not every –IR verb is stem-changing. For example, Escribir is not stem-
changing.
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