Answers

2014-12-22T18:43:46+05:30

It is Had+ past participle form of the verb. For eg- She had finished her work. 
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2014-12-22T18:48:02+05:30
Past perfect tense :
                      the past perfect tense shows that something occurred before the action in the past.
form : had + past participle
ex : she had completed her assignment before the submission date.
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