Comprehensive Guide to Spanish Preterite Irregularities and Quiz Preparation

Student and Quiz Administration Information This document contains the cumulative study material for the upcoming quiz scheduled for May 1, 2026 ($5/1/26$). These comprehensive notes were recorded by Timarie Castro on April 29, 2026 ($4/29/26$). The primary focus of the assessment is the mastery of specific irregular verb categories within the Spanish preterite tense, with particular emphasis on orthographic changes and third-person stem shifts. # Orthographic Changes in the Preterite: -CAR, -GAR, and -ZAR Verbs In the Spanish preterite tense, verbs that have infinitives ending in $-car$, $-gar$, or $-zar$ exhibit a specific irregularity. This irregularity is confined strictly to the yo (first-person singular) form of the conjugation. The spelling change occurs to maintain the hard phonetic sound of the consonants found in the infinitive forms. ## -CAR Verbs For verbs ending in $-car$, the ending replaces the $-car$ with $-qué$ in the yo form ($-car</h3><p>ightarrow -qué$). Verbs to memorize include: - buscar: To look for. - sacar: To take out. - tocar: To play (an instrument or music) or to touch. ## -GAR Verbs For verbs ending in $-gar$, the ending replaces the $-gar$ with $-gué$ in the yo form ($-gar ightarrow -gué$). Verbs to memorize include: - llegar: To arrive. - pagar: To pay. - jugar: To play (a game or sport). ## -ZAR Verbs For verbs ending in $-zar$, the ending replaces the $-zar$ with $-cé$ in the yo form ($-zar ightarrow -cé$). Verbs to memorize include: - abrazar: To hug. - comenzar: To start. - almorzar: To eat lunch. # Vowel-Stem Verbs and the Third-Person "Y" Irregularity There is a specific class of verbs whose stems end in a vowel. These verbs are categorized as irregular in the third-person forms (both singular and plural) because the typical "i" in the preterite ending is replaced by a "y" to prevent three-vowel clusters. ## Conjugation Shifts in the Third Person - Third-Person Singular: The ending becomes $-yó$. - Third-Person Plural: The ending becomes $-yeron$. ## Essential Verbs in this Category The following verbs are identified as having these specific third-person irregularities: - Leer: To read. - Creer: To believe. - Caer: To fall. - Oír: To hear. # Stem-Changing Irregularities for -IR Verbs in the Preterite Verbs ending in $-ir$ that undergo stem changes in the present tense also undergo stem changes in the preterite. However, unlike the present tense, these changes are exclusive to the third-person forms, encompassing both the singular and the plural (often called "slipper" or "sole" verbs). ## $e ightarrow i$ Stem Changes In these verbs, the vowel "e" in the stem changes to an "i" in the third-person singular and plural forms. - Sentir: To feel ($e ightarrow i$). - Mentir: To lie ($e ightarrow i$). ## $o ightarrow u$ Stem Changes In these verbs, the vowel "o" in the stem changes to a "u" in the third-person singular and plural forms. - Dormir: To sleep ($o ightarrow u$).