#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"
  supertype:  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
        supertype:  grammatical_category__grammaticalcategory__syntactic_category__syntacticcategory  a category of words having the same grammatical properties
           supertype:  class.aggregation__clas__family  a collection of things sharing a common attribute; "there are two classes of detergents"
              supertype:  aggregation__collection__accumulation__assemblage  several things grouped together
                 supertype:  group__grouping  any number of entities (members) considered as a unit
                    supertype:  collection  something gathering separated things (entities/situations)
                       supertype:  divisible_entity__divisibleentity  many classifications under this category are application-dependant
                          supertype:  entity  something that can be "involved" in a situation
                             supertype:  thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type
                          supertype:  divisible_thing__divisiblething
                             supertype:  thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type

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