The document provides examples of changing direct speech to reported speech by modifying verb tenses and certain words according to standard rules of reported speech. Some examples given are changing "We're watching TV" to "They said that they were watching TV" and "She must wear a helmet" to "He said that she had to wear a helmet." The document also reviews the rules for reported speech, which include changing the present tense to the past tense, present perfect to past perfect, and modal verbs like "can" to past tense equivalents.