#perfective_tense__perfective__perfect__perfect_tense__perfecttense  a tense of verbs used in describing action that has been completed (sometimes regarded as perfective aspect)
  supertype:  #tense  a grammatical category of verbs used to express distinctions of time
  subtype:  #present_perfect_tense__presentperfecttense__present_perfect__presentperfect  a perfective tense used to express action completed in the present; "`I have finished' is an example of the present perfect"
  subtype:  #past_perfect_tense__past_perfect__pluperfect__pluferfect_tense  a perfective tense used to express action completed in the past; "`I had finished' is an example of the past perfect"
  subtype:  #future_perfect_tense__future_perfect  a perfective tense used to describe action that will be completed in the future; "`I will have finished' is an example of the future perfect"

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