#progressive_tense__progressivetense__progressive__imperfect__imperfect_tense__imperfecttense__continuous_tense  a tense of verbs used in describing action that is on-going
  supertype:  #tense  a grammatical category of verbs used to express distinctions of time
  subtype:  #present_progressive_tense__presentprogressivetense__present_progressive__presentprogressive  a tense used to express action that is on-going at the time of utterance
  subtype:  #past_progressive_tense__past_progressive  a progressive tense used to describe on-going action in the past; "`I had been running' is an example of the past progressive"
  subtype:  #future_progressive_tense__future_progressive  a progressive tense used to express action that will be on-going in the future; "`I will be running' is an example of the future progressive"

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