The document discusses two ways to express future actions from a past perspective in English:
1) Using "would" to express future actions from a past viewpoint, following the sequence "subject + would + verb." This is used when a past time is already mentioned.
2) Using "was/were going to" to express a plan from a past perspective, following the sequence "subject + was/were + going to + verb." This indicates an intention that was held in the past. Examples are given of how each structure is used.