I had finished my work before he returned.
After the sun had set, we decided to return home.
We had reached the station when the rain started.
He thanked me for what I had done for him.
The manager had not left the office before I arrived.
We had written the article by five o'clock.
By the end of the year she had learnt to speak English.
We sent him a telegram yesterday as we had not received any letters from him for a long time.
After he had turned off the light, he left the room.
He had been away for several months before his first letter came.