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Though most paper currency ...

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by doclkk » Thu Jun 18, 2009 6:50 pm
Though most paper currency was at one time backed by fixed assets such as gold or silver, it now derives its purchasing power from a declaratory fiat of the issuing government.

A. was at one time backed by
B. had at one time been backed by
C. was at one time backing
D. had at one time backed
E. has at one time been backed by





OA: A

My thoughts: [spoiler]I don't really understand the rule here. Can someone explain when to use past perfect and when to use the simple past [/spoiler]
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by anksgupta » Thu Jun 18, 2009 7:00 pm
IMO A,

Past perfect should be used when you hav 2 different timeframes corresponding to current time. In that case past perfect(had) is used for the earlier of the two time frames and simple past is used for the later time frame.

Like:
Last year govenment decided to implement the law which had been enacted in the year 2000
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by doclkk » Fri Jun 19, 2009 4:58 am
anksgupta wrote:IMO A,

Past perfect should be used when you hav 2 different timeframes corresponding to current time. In that case past perfect(had) is used for the earlier of the two time frames and simple past is used for the later time frame.

Like:
Last year govenment decided to implement the law which had been enacted in the year 2000
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