Preterite of

1
Preterite of IR Stem Changers

• 6A

2
Common IR Stem Changers

• Preferir (to prefer)
• Mentir (to lie)
• Sentirse (to feel)
• Divertirse (to enjoy yourself) (also a reflexive)
• Pedir (to ask for)
• Repetir (to repeat)
• Vestirse (to get dressed)
• Competir (to compete)
• Servir (to serve)
• Sonreír (to smile)
• Dormir (to sleep)
• Morir (to die)
• Sonreír has irregular formsSonreí, Sonreíste,
  Sonrió, Sonreímos, Sonreísteis, Sonrieron

-IR Endings in the Preterite Í imos iste isteis
ió ieron

• -AR and ER stem changers do not change in the
  preterite

3
To Conjugate

• Conjugate the yo, tú, nosotros and vosotros forms
  regularly.
• Preferir Dormir
• preferí preferimos dormí dormimos
• preferiste preferisteis dormiste dormisteis

4
To Conjugate

• In the él/ella/usted and ellos/ellas/ustedes
  form, the E or O that usually changes STILL
  changes. The E will change to an I (for both e-i
  and e-ie) and the O will change to a U (for
  o-ue).
• Preferir Dormir
• preferí preferimos dormí dormimos
• preferiste preferisteis dormiste dormisteis
• prefirió prefirieron durmió durmieron