The document discusses different past tenses in English including:
1) The past simple for finished actions in the past with examples like "worked" and "stopped".
2) The past continuous formed with "was/were + verb+ing" to describe actions in progress at a specific time in the past, often interrupted by other past actions.
3) The past perfect formed with "had + past participle" to talk about actions that occurred earlier in the past before another past action.
It provides examples and rules for using these tenses together to clearly indicate the sequence of past events in a narrative.