#major_form_class  any of the parts of speech of traditional grammar
  supertype:  #part_of_speech__form_class__word_class  one of the traditional categories of words intended to reflect their functions in a grammatical context
  subtype:  #noun.major_form_class  a word that can serve as the subject or object of a verb
  subtype:  #verb  a word that serves as the predicate of a sentence
     subtype:  #infinitive  the uninflected form of the verb
        subtype:  #split_infinitive__splitinfinitive  an infinitive with an adverb between `to' and the verb (e.g., `to boldly go')
     subtype:  #participle  a non-finite form of the verb; in English it is used adjectivally and to form compound tenses
        subtype:  #present_participle__presentparticiple  a participle expressing present action; in English is formed by adding -ing
        subtype:  #past_participle__perfect_participle__perfectparticiple  a participle that expresses completed action
     subtype:  #transitive_verb_form__transitive_verb  a verb (or verb construction) that requires an object to be grammatical
        subtype:  #doubly_transitive_verb_form__doubly_transitive_verb  a transitive verb that takes both a direct and an indirect object
     subtype:  #intransitive_verb_form__intransitive_verb  a verb (or verb construction) that does not take an object
  subtype:  #adjective.major_form_class  the word class that qualifies nouns
  subtype:  #adverb  the word class that qualifies verbs or clauses

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