This document provides information about using the past simple tense ("to be" verbs) in Spanish. It includes: 1) The conjugations of the affirmative, negative, and interrogative forms of the verbs "ser" and "estar" in the past simple tense. 2) Examples of using these forms in sentences. 3) Time expressions that are used with the past simple tense, such as "yesterday," "last week," "a month ago." 4) Regular and irregular verb forms in the past simple tense as well as notes on pronunciation. 5) How to form affirmative, negative, and interrogative sentences using the past simple tense.