Past Perfect Tense
Past Perfect Tense: Past Perfect Tense is used to refer to the action that happened before another action.
Example: He had reached there before we came.
The teacher had come before the students stood up.
***The sentence which will be used as Past Perfect Tense need had as an auxiliary verb and its main verb will be in past participle form.
***Between two works which happened before that will Past Perfect Tense and which happened after will be Past Indefinite Tense.
***Structure-1: Sub+had+vpp+ob+before+Past Tense.
The patient had died before the doctor came.
The thief had run away before the police came.
The mother had come before the child fell from the cot.
***Structure-2: Sub+vpt+ob+after+Past Perfect Tense.
The patient died after the doctor had come.
It started to rain after I had come home.
Father went away after he had seen his son.
***Structure-3: Sub+had+not+vpp+before+Past Tense.
He had not done his work before We reached there.
They had not started the game before the opposite team came.
Structure-4: Had+Sub+vpp+before+Past Tense?
Had she finished her duty before you reached there?
Had the patient died before the doctor came?