The document discusses the differences between direct speech and indirect speech, also known as reported speech. Direct speech reports the exact words spoken, using quotation marks. Indirect speech does not use quotation marks and changes pronouns, tense, place and time expressions to reflect the new context. There are two types of changes between direct and indirect speech: punctuational changes like removing commas and quotes, and structural changes like changing pronouns and tenses to maintain consistency. The document provides examples and rules for changing different types of sentences like statements, questions, imperatives and exclamations between direct and indirect speech.