1. Regret About the Past:
It expresses regret about something that did not happen in the past.
2. Missed Opportunities:
Describes opportunities or chances that were missed because a condition was not met in the past.
3. Imagining Different Past Outcomes:
Used to imagine how things could have been different if something else had happened.
4. Hypothetical Past Situations:
It expresses hypothetical situations that are impossible to change because they are in the past.
5. Blaming or Criticizing Past Actions:
Can be used to criticize or blame someone for actions that didn’t happen in the past.