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Stem-Changing Verbs in the Preterite
IR stem-changing verbs change in the 3rd person singular and plural forms in the preterite tense.
Types of Stem Changes
E to I and O to U changes occur in certain stem-changing verbs in the preterite.
What is the preterite tense rule for -AR and -ER verbs?
There is no stem-change in the preterite tense for -AR and -ER verbs.
Examples of E to I stem changes in the preterite
Pedir changes to pidió (he requested) and pidieron (they requested).
Examples of O to U stem changes in the preterite
Dormir changes to durmió (he slept) and durmieron (they slept).
Present Progressive Tense
Used to describe actions currently in progress, formed with 'estar' + present participle.
What is the verb ending for -AR verbs in the present participle?
-ando (e.g., hablar -> hablando).
What is the verb ending for -ER/-IR verbs in the present participle?
-iendo (e.g., comer -> comiendo).
Irregularities in Present Progressive Tense
Some stem-changing verbs like preferir change to prefiriendo.
Double Pronouns
Combining indirect and direct object pronouns in sentences.
Sequence of Double Pronouns
The indirect object pronoun (I.O.P.) precedes the direct object pronoun (D.O.P.) in sentences.
What happens when both pronouns in Double Pronouns start with 'L'?
The I.O.P. changes to 'Se'.
What does the imperfect tense describe?
Past events that are seen as ongoing or habitual.
Usage of Imperfect Tense
To describe habitual actions, set the scene, describe characteristics, express time, or state age.
Formation of Superlatives
Combine 'el/la' with 'más' (most) or 'menos' (least) followed by the adjective.
What is the absolute superlative formation?
Drop the final vowel of the adjective and add -ísimo/-ísima/-ísimos/-ísimas.
Irregular Superlative Example
Rico becomes riquísimo.
Final Example of Superlatives
Carlos es el más simpático de todos.