1. Stem Changing Verbs
Here are the 4 types of Stem Changing verbs that exist in Spanish.
O - ue
E - ie
U - ue
E - i
Here’s how it works: Go to the middle of the word and find the vowel that is supposed to change and replace it with it’s vowel(s) replacements.

2. Stem Changers = Boot Verbs
Why are Stem Changers also called Boot Verbs?
When you conjugate a stem changing verb you do not conjugate the Nosotros form nor the Vosotros form. If you draw a line around the forms of the verb that require the stem changing then it will appear like a boot. This is to help you remember which ones do not require to be stem changed.

4. Boot Verb= Stem Changers
The stubjects inside the boot require the stem changers. And those subjects out of the boot do not. Yo Tú
Él, Ella, Ud.
Nosotros
Ellos, Ellas, Uds.

5. O- UE Stem Changers almorzar = to have/ eat lunch dormir = to sleep
These verbs have radical changes o-ue:
almorzar = to have/ eat lunch
dormir = to sleep
volver = to return
llover = to rain
poder = to be able to/ can
* * * Conjugate these verbs in your notes now and double check your work with the following slides.
Remember: go to the middle for the stem changer

6. Almorzar- to have/eat lunch
(o-ue)
almuerzo
almorzamos
No change- out of the boot
almuerzas
almuerza
almuerzan

7. Dormir- to sleep (o-ue)
duermo
dormimos
No change- out of the boot
duermes
duerme
duermen

8. Volver- to return (o-ue)
vuelvo
vuelves
vuelve
volvemos
No change- out of the boot
vuelven

9. Llover- to rain (o-ue) It…
lluevo
llueves
llueve
llovemos
No change- out of the boot
It…
llueven

10. Poder- to be able to/ can
(o-ue)
puedo
puedes
puede
podemos
No change- out of the boot
pueden

11. E- IE Stem Changers Remember: go to the middle for the stem changer
These verbs also have radical changes e-ie:
querer = to want
empezar = to begin or start
entender = to understand
tener = to have
venir = to come
preferir = to prefer
pensar = to think/ to believe
recomendar = to recommend
* * * Conjugate these verbs in your notes now and double check your work with the following slides.
Remember: go to the middle for the stem changer

12. Querer- to want (e - ie) quiero queremos quieres quiere quieren
No change- out of the boot
quieres
quiere
quieren

13. Empezar- to begin/ start
(e - ie)
empiezo
empezamos
No change- out of the boot
empiezas
empieza
empiezan

14. Entender- to understand
(e - ie)
entiendo
entendemos
No change- out of the boot
entiendes
entiende
entienden

15. Tener- to understand (e - ie) tengo tenemos No change- out of the boot
tienes
tiene
tienen

16. Venir- to understand (e - ie) vengo venimos vienes viene vienen
No change- out of the boot
vienes
viene
vienen

17. Preferir- to prefer (e - ie) prefiero preferimos prefieres prefiere
No change- out of the boot
prefieres
prefiere
prefieren

18. Pensar- to think (e - ie) pienso pensamos piensas piensa piensan
No change- out of the boot
piensas
piensa
piensan

19. Recomendar- to recommend
(e - ie)
recomiendo
recomendamos
No change- out of the boot
recomiendas
recomienda
recomiendan

20. Jugar = to play a game/ sport
U- UE stem Changer
This verb has a radical change u-ue:
Jugar = to play a game/ sport
* * * Conjugate this verb in your notes now and double check your work with the following slides.

21. Jugar- to play a game/sport
juego
jugamos
juegas
juega
juegan

22. E- I stem Changer This verb has a radical change e-i:
decir = to say/ to tell
servir= to serve
pedir= to ask for
* * * Conjugate this verb in your notes now and double check your work with the following slides.

23. decir- to sleep
yo-igo
(e-i)
digo
decimos
dices
dice
dicen

24. servir- to serve
(e-i)
sirvo
servimos
sirves
sirve
sirven

25. pedir- to ask for
(e-i)
pido
pedimos
pides
pide
piden