Stem Changing in the
Preterite
Stem Change Review
How do you change QUERER (e-ie)?
FOLLOW THESE STEPS:
1. Remove the ending
Q UE
IER E R
1. Quiero
2. Quieres
2. Find the stem
3. Quiere
3. Change the stem
4. Queremos
4. Conjugate!
5. Queréis
6. Quieren
How do you know when to stem change?
You had to memorize a list of stem change verbs:
• Querer (e-ie)
• Empezar (e-ie)
• Jugar (u-ue)
• Pedir (e-i)
• Encontrar (o-ue)
• Etc…
When do you preterite stem change?
Stem changing in the preterite is EASY!!!! Follow
these three simple rules:
1. You stem change only “IR” verbs.
2. You only stem change the “ella” and “ellas”
forms.
3. The verb will only change from “E-I” or “O-U”.
4. You conjugate the other forms like normal.
Stem Change Preterite
How do you change DORMIR (o-ue,u)?
FOLLOW THESE STEPS:
1. Remove the ending
2. Find the stem
3. Change the stem
(only in Ella and Ellas)
4. Conjugate!
DU
O R MI R
1. Dormí
2. Dormiste
3. Durmió
4. Dormimos
5. Dormisteis
6. Durmieron
Let’s Try Another
How do you change PEDIR (e-i, i)?
FOLLOW THESE STEPS:
1. Remove the ending
2. Find the stem
3. Change the stem
(only in Ella and Ellas)
4. Conjugate!
P EI D I R
1. Pedí
2. Pediste
3. Pidió
4. Pedimos
5. Pedisteis
6. Pidieron
Let’s Try Another
How do you change COSTAR (o-ue)?
FOLLOW THESE STEPS:
1. Remove the ending
2. Find the stem
3. Change the stem
(only in Ella and Ellas)
4. Conjugate!
CU
OS TA R
1. Costé
2. Costaste
3. Costó
4. Costamos
5. Costasteis
6. Costaron
¡PRÁCTICA!
1.
2.
3.
4.
5.
6.
7.
8.
Morir (yo)
Repetir (Uds.)
Preferir (yo)
Almorzar (ellos)
Servir (Ud.)
Vestir (ellas)
Sentir (tú)
Competir (vosotros)
1.
2.
3.
4.
5.
6.
7.
8.
Morí
Repitieron
Preferí
Almorzaron
Sirvió
Vistieron
Sentiste
Competisteis