The document discusses two uses of the past simple tense in English. The first use is to describe finished actions that occurred at a specific time in the past, whether they were short or long actions. The second use is to talk about situations that existed in the past. It then provides examples for each use. It also defines determiners as modifying words that identify nouns in more detail and determine the kind of reference a noun has, noting that determiners are always followed by a noun unlike pronouns.