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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