Rules

Question 1

What happens to -ar and -er stem-changing verbs in the preterite?

Answer 1

-Ar and -er stem-changing verbs have no stem change in the preterite

Question 2

Preterite of servir (to serve)

Answer 2

Serví, serviste, sirvió, servimos, servisteis, sirvieron

Question 3

Preterite of dormir (to sleep)

Answer 3

Dormí, dormiste, durmió, dormimos, dormisteis, durmieron

Question 4

When do stem-changing -ir verbs have a stem change in the preterite?

Answer 4

Stem-changing -ir verbs (in the preterite only) have a stem change in the 3rd person singular and plural forms:
Él, ella, usted
Ellos, ellas, ustedes

Question 5

2 types of stem changes

Answer 5

E - i: Pedir - pidió, pidieron

O - u: Morir - murió, murieron

Question 6

Preterite endings of -ar verbs

Answer 6

É, aste, ó, amos, asteis, aron

Question 7

Preterite endings of -er verbs

Answer 7

Í, iste, ió, imos, isteis, ieron

Question 8

Preterite endings of -ir verbs

Answer 8

Í, iste, ió, imos, isteis, ieron

Question 9

What happens to -ir stem-changing verbs in the preterite?

Answer 9

-Ir stem-changing verbs do have a stem change in the preterite