The document discusses the uses of the imperfect and preterite tenses in Spanish. The imperfect tense is used to describe situations, states, or conditions that were ongoing or habitual in the past. It can be used to indicate what the time, day, or weather was like. The preterite tense describes single, definite actions or events that occurred and were completed in the past. The document provides examples of verbs commonly used with the imperfect tense to describe states of being.