Past Perfect S + had + V3 + O
The past perfect is used to indicate
1. An action that happened before another action in the past there usually are two action in the sentences.
• John had gone to the store before he went home
• Jack told us yesterday that he had visited England in 1970
S + had + V3 + before + S + V2
• John went home after he had gone to the store
S + V2 + after + S + had + V3
• Before john went home, he had gone to the store
before + S + V2 + S + had + V3
• After john had gone to the store, he went home
after + S + had + V3 + S + V3
2. A state which continued for a time in the past, but sopped before now
• Abdu had lived in New York for teen years before he moved to california
Past perfect which progressive (continues) for category 2 of past perfect only, we can use the past perfect continues.
S + had + been + V3 + ...
• Abdu had been living in New York for teen years before he moved to California

Essay !
1. The policeman read the suspect his right after he had arrested (arrest) him
2. After john had wash (wash) his clothes, he begin to study.
3. Maria entered (enter) the university after she had graduated from the community college.
4. George had waited (wait) for one hour before the bus come.
5. Jearette washed (wash) the pipettes after she had completed the experiment.
6. Jane sent a letter to her university after she has received (receive) her scholarship check.
7. After the stewardesses had served lunch to the passengers, the sat (sit) down.
8. The car had flipped (flip) ten times before it leaded on if roof.
9. We corrected our papers after he had taken (take) the quiz.
10. John had been living (live) in Miami for one year when his parents come to visit.