This document discusses how to conjugate verbs ending in "-AR" in the preterite tense in Spanish. It explains that the preterite tense is used to talk about actions that were completed in the past. It provides a 3 step process to conjugate "-AR" verbs in the preterite: 1) drop the "-AR" ending, 2) determine who performed the action, and 3) add the correct ending based on the subject ("-é", "-aste", "-ó", "-amos", "-aron"). An example is provided using the verb "cantar" (to sing).