past viewpoint + subject + would + base verbUse would when a past moment looks forward to something later.
Future in the Past shows a future event from a past viewpoint. Use would, was/were going to, and was/were about to based on meaning.
past viewpoint + subject + would + base verbUse would when a past moment looks forward to something later.
subject + was/were going to + base verbUse was/were going to for a plan or intention from a past viewpoint.
subject + was/were about to + base verbUse was/were about to when the action was just one moment away.
Anna was going to start in June.
Use was going to even if the plan later changed.
A past verb like said, knew, or promised sets a past viewpoint. What was still in the future then often takes would.
Use was/were going to for plans, intentions, or expected actions in the past. The plan may happen later, change, or fail.
Use was/were about to when something was just going to happen. It often appears with when to show interruption at the last second.
It also appears in plain narration about past plans and near-future moments: I was going to leave. The show was about to start.
Would is only one option. Use was/were going to for plans and was/were about to for the immediate next moment.
WOULD_AFTER_PAST_REPORTINGw5Use would when a past sentence looks forward to something that was still in the future at that time. It often follows past reporting verbs like said, knew, thought, or promised.
WAS_WERE_GOING_TO_FOR_PLANSw5Use was/were going to when someone had a plan or intention in the past. The action was in the future from that past moment, whether it happened or not.
WAS_WERE_ABOUT_TO_FOR_IMMEDIATE_NEXTw4Use was/were about to when the next action was very close in time from a past viewpoint. It often describes an immediate next moment.
CHOOSE_FORM_BY_MEANINGw5Pick would for neutral later future from a past view, was/were going to for plans, and was/were about to for the immediate next moment. The choice depends on meaning, not just time words.
PAST_VIEWPOINT_MARKERSw3Words and phrases like said, thought, knew, later, the next day, and soon show that the sentence looks forward from a past moment. These markers help you choose a future-in-the-past form.