1. Stem Changing in the Preterite

2. Q U E IE R E R Stem Change Review Remove the ending Find the stem
How do you change QUERER (e-ie)?
Q U E IE R
E R
FOLLOW THESE STEPS:
Quiero
Quieres
Quiere
Queremos
Queréis
Quieren
Remove the ending
Find the stem
Change the stem
Conjugate!

3. When do you preterite stem change?
Stem changing in the preterite is EASY!!!! Follow these three simple rules:
You stem change only “IR” verbs.
You only stem change the “bottom of the boot”.
The verb will only change from “E-I” or “O-U”.
You conjugate the other forms like normal.

4. D U O R M I R Stem Change Preterite Remove the ending Find the stem
How do you change DORMIR (o-ue,u)? D U O
R M
I R
FOLLOW THESE STEPS:
Remove the ending
Find the stem
Change the stem (only in the bottom of the boot)
Conjugate!
Dormí
Dormiste
Durmió
Dormimos
Dormisteis
Durmieron

5. Los verbos Dormir (o-u)** Morir (o-u)** **Originally (o-ue)
Pedir (e-i)
Servir (e-i)
Seguir (e-i)
Divertirse (e-i)*
Preferir (e-i)*
Sentirse (e-i)*
Repetir (e-i)
Vestirse (e-i)
Competir (e-i)
*Originally (e-ie)
Dormir (o-u)**
Morir (o-u)**
**Originally (o-ue)
Reirse (e-i)* (Sonreirse)
Río
Rieron
No double “i”

6. ¡PRÁCTICA! Morir (yo) Morí Repetir (Uds.) Repitieron Preferir (yo)
Almorzar (ellos)
Servir (Ud.)
Vestir (ellas)
Sentir (tú)
Competir (nosotros)
Morí
Repitieron
Preferí
Almorzaron
Sirvió
Vistieron
Sentiste
Competimos

7. P E I D I R Let’s Try Another Remove the ending Find the stem
How do you change PEDIR (e-i, i)? P E I D
I R
FOLLOW THESE STEPS:
Remove the ending
Find the stem
Change the stem (only in the bottom of the boot)
Conjugate!
Pedí
Pediste
Pidió
Pedimos
Pedisteis
Pidieron

8. C U O S T A R Let’s Try Another Remove the ending Find the stem
How do you change COSTAR (o-ue)? C U O
S T
A R
FOLLOW THESE STEPS:
Remove the ending
Find the stem
Change the stem (only in the bottom of the boot)
Conjugate!
Costé
Costaste
Costó
Costamos
Costasteis
Costaron