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Anonymous Posted 14 years ago
Grammar

aspect

When do you use have, had and has in using verb perfect aspect?
  

Top answer

org/en/grammar-reference/past-perfect

  • org/en/grammar-reference/past-perfect
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1 Answers
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First, please read about present perfect and past perfect at these links:

http://web2.uvcs.uvic.ca/elc/studyzone/410/grammar/pperf.htm
http://lear

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