different usages of this tense:
A state that
started in the past, and continued up to some time
in the past
Note: this is a broader use of this tense.
It is usually used with states, not actions.
Make sure you also read:Examples of Typical Time Expressions
(The verbs are
He studied so much because he had received a lot of homework.
He had seen the ball before he hit it.
They had practiced before they did it.
He had worked very hard before he finally won.
She said she had bought the hat in Paris.
They had already scored before the 9 o'clock break.
He had finished building his house before 1999.
She had never played basketball before 2002.
He had liked her before this happened.
She had wanted a cat, but received a fish.
The report had been ready before you spilled the coffee!
He had been healthy until he started overeating.
He had owned a car for 5 years before he switched to bicycle.