Sequence of Events
1. In the past, something happened ===========================> Simple Past Tense =====> "-ed" form of the verb
2. Before the above event, something had happened ==============> Past Perfect Tense =====> "had" + been + "-ed" form of the verb
3. Again, before the above event, something had happened ==========>Past perfect Tense =====>"had" + been + "-ed" form of the verb
...
1. In the past, something happened ===========================> Simple Past Tense =====> "-ed" form of the verb
2. Before the above event, something had happened ==============> Past Perfect Tense =====> "had" + been + "-ed" form of the verb
3. Again, before the above event, something had happened ==========>Past perfect Tense =====>"had" + been + "-ed" form of the verb
...
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