FORM
[HAD]+Past Principle
Examples
Had you eaten anything after you arrived at the airport
Jimmy had not finished his chemistry assignment yet
You had studied englih before you moved to New York
Duration Before Something in the Past
Past Perfect+Just
Active/Passive
Specific time with the Past Perfect
FORM
Use specific time words or phrases with the past perfect
Examples
She had visited her Japanese relatives once in 1993 before she moved in with them in 1996
She visited her japanese relatives once in 1993 before she moved in with them in 1996