The past perfect can serve as an analogue of the present perfect for the past.
Compare the present perfect with the past perfect:
The milk is fresh. I have checked the date on the bottle. → The milk was fresh. I had checked the date on the bottle. Andrew has won the lottery. He can't believe it! → Andrew had won the lottery. He couldn't believe it! It's the first time I have ridden a horse. → It was the first time I had ridden a horse. I don't know the rules. I have never played this game before. → I didn't know the rules. I had never played this game before.
Confirm your action
You can continue this exercise later on from the point where you stopped.