The Preterite of Regular ER/IR Class Verbs

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The Preterite of RegularER/IR Class Verbs
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• 1. The rules for the preterite of regular AR
  class verbs apply to the ER/IR Class verbs.

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• 2. To form the preterite of this class of verbs,
  you add the correct ER/IR preterite ending to the
  stem of the infinitive.
• stem regular preterite ER/IR ending

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• 3. The preterite endings for ER/IR class verbs
  are
• yo- í nosotros(as)- imos
• tú- iste ustedes- ieron
• Ud., él, ella- ió ellos(as)- ieron

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• Example Escribir (to write)
• Yo escribí
• Tú escribiste
• Ella escribió
• Nosotros escribimos
• Ellos escribieron

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• 4. For ER class verbs, the Preterite is NOT the
  same for the nosotros form as it is with the
  Present.
• ex. comemos (present tense)
• comimos (preterite tense)

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• 5. For IR Class verbs, the nosotros form is
  the same as it is for the Present Tense.
• Ex. subimos (present)
• subimos (preterite)

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• 6. Spelling changes
• a. for any verb whose stem ends in a vowel, ió
  and ieron change to yó and yeron.
• Example creer- to think/believe
• yo creí
• tú creíste
• él creyó
• nosotros creímos
• ellos creyeron
• Other verbs like this are oír (hear), leer (read)
• caer (fall)

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• b. The tú and nosotros forms also require
• a written accent for these four verbs.
• creíste oíste leíste caíste
• creímos oímos leímos caímos

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7. The verb DAR (to give)
Though the verb dar is an AR class verb, it is
conjugated as an ER/IR verb In the preterite
tense.
Yo di
Nosotros dimos
Tú diste
Ustedes, ellos, ellas dieron
Usted, él, ella dio
Los muchachos dieron una caminata.