(1) The document discusses the past simple and past continuous tenses in English.
(2) The past simple is used to talk about completed past actions and permanent past actions, often using time words like "yesterday" or "last week." The past continuous describes an ongoing action in the past.
(3) Both tenses are used to talk about past events, but the past continuous emphasizes the ongoing nature of an action, while the past simple focuses on completion without reference to duration.