There are two ways to report what someone has said: direct speech and indirect speech. Direct speech uses quotation marks and does not change the tense, while indirect speech introduces reported speech with "that" and changes pronouns, adverbs of time and verb tenses according to specific rules. A table outlines how to change verb tenses like simple present to past simple and compound tenses like present perfect continuous to past perfect continuous. Examples are provided to illustrate the tense changes in indirect speech.