I had done my homework before my mother returned home.
We had met in the street before we went to the park.
They had packed their thing before they started.
I had had dinner before I switched on the TV set.
He had returned home before the guest left.
We had come to the cinema before the film began.
I had read the book before I saw the play.
They had lived here before they moved to another place.
We had played a game of tennis before we went to my place.