Compare the preterite tense conjugations to the present tense conjugations for an AR verb (hablar) as well as an ER/IR verb (comer) in this chart. Pay particular attention to the endings in the tú, nosotros, vosotros, and ellos/ellas/ustedes forms. What do the present and preterite endings for those subjects have in common? Do these patterns hold true for irregular verbs as well?