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[ÇóÖú] English tense

I am puzzled  with English tense , Could you please give me some example to make me understand  the past tense and present perfect tense  and past present perfect tense ? when I write sth in English ,I often make mistakes about English tense  . thank you very much
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I didn't go to the film because I had seen it twice.ÎÒûȥ¿´µçÓ°£¬ÒòΪÕâÆ¬×ÓÎÒÒÑ¿´¹ýÁ½´ÎÁË¡£
When I had gone over my lessons I took a rest.ÎÒ¸´Ï°Í깦¿ÎÖ®ºó£¬ÐÝÏ¢ÁËÒ»»á¶ù¡£
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