The document discusses the preterite tense in Spanish. It is used to express actions that began and ended at a definite time in the past. The preterite tense endings for -ar, -er, and -ir verbs are provided and compared to their present tense endings. For -ar verbs like hablar, the yo form ends in -é and the él/ella/usted forms end in -ó in the preterite. For -er and -ir verbs like comer and vivir, the endings are identical in the preterite tense and some present and preterite forms are the same for nosotros.