Question

uses of past perfect tense

Answer 1

The past perfect tense is used to show that something happened before another action in the past. It can also be used to show that something happened before a specific time in the past.

Answer 2

past perfect tenses  are  used to talk about things that happened in the past. However we use past perfect to talk about something that happened before another action in the past, which is usually expressed by the past simple. For example: "I had already eaten my dinner when he called."