This document discusses different ways to talk about past habits or states that are no longer true in English. It explains that "used to" can be used with an infinitive to talk about past states or repeated past actions that no longer occur. "Would" can also refer to repeated past actions, and implies they occurred more frequently, but is slightly more formal than "used to". Finally, the past simple tense can refer to both single past events or past habits, but does not emphasize their repetitive nature or indicate they are no longer occurring like "used to" or "would".