From Daily Writing Tips 9 Forms of the Past Tense
One of my favorite grammar books: The Deluxe Transitive Vampire: The Ultimate Handbook of Grammar for the Innocent, the Eager, and the Doomed by Karen Elizabeth Gordan
wrote some wonderful sentences for the past tense.
Past Progressive Tense ( action going on in a previous time)
Past Perfect Progressive Tense( ongoing action completed before another past time)
Past Perfect Tense( action completed before another time)
As the pundits say--stay in the present moment.