#grammatical_relation__grammaticalrelation  a linguistic relation established by grammar
  supertype:  #linguistic_relation  a relation between linguistic forms or constituents
  subtype:  #concord__agreement  the determination of grammatical inflection on the basis of word relations
     subtype:  #number_agreement  agreement in number between words in the same grammatical construction (e.g., between adjectives and the nouns they modify)
     subtype:  #person_agreement  agreement in person between pronouns and verbs
     subtype:  #case_agreement  agreement in grammatical case between words in the same construction
     subtype:  #gender_agreement  agreement in grammatical gender between words in the same construction
  subtype:  #transitivity__transitiveness  the grammatical relation created by a transitive verb
  subtype:  #intransitivity__intransitiveness  the grammatical relation created by an intransitive verb
  subtype:  #coreference  the grammatical relation between two words that have a common referent
     subtype:  #reflexivity__reflexiveness__reflexivenes  the coreferential relation between a reflexive pronoun and its antecedent
  subtype:  #conjunction  the grammatical relation between linguistic units (words or phrases or clauses) that are connected by a conjunction
     subtype:  #coordinating_conjunction.conjunction__coordinatingconjunction  the coordination by conjunction of linguistic units of the same status
     subtype:  #subordinating_conjunction__subordinatingconjunction  the subordination that occurs when a conjunction makes one linguistic unit a constituent of another
     subtype:  #copulative_conjunction  the conjunctive relation of units that expresses the addition of their meanings
     subtype:  #disjunctive_conjunction__disjunctiveconjunction  the conjunctive relation of units that expresses the disjunction of their meanings
     subtype:  #adversative_conjunction__adversativeconjunction  the conjunctive relation of units that expresses the opposition of their meanings
  subtype:  #complementation  the grammatical relation of a word or phrase to a predicate
  subtype:  #coordination.grammatical_relation  the grammatical relation of two constituents having the same grammatical form
  subtype:  #subordination.grammatical_relation  the grammatical relation of a modifying word or phrase to its head
  subtype:  #limiting__modification__qualifying  the grammatical relation that exists when a word qualifies the meaning of the phrase
     subtype:  #restrictiveness  modification that makes the meaning more specific (`red hat' has a more specific meaning than `hat')
     subtype:  #apposition.limiting  a grammatical relation between a word and a noun phrase that follows; "`Rudolph the red-nosed reindeer' is an example of apposition"
  subtype:  #mood__mode__modality  verb inflections that express how the action or state is conceived by the speaker
     subtype:  #indicative_mood__indicative__declarative_mood__declarativemood__declarative__common_mood__fact_mood  a mood (grammatically unmarked) that represents the act or state as an objective fact
     subtype:  #subjunctive_mood__subjunctivemood__subjunctive  a mood that represent an act or state (not as a fact but) as contingent or possible
     subtype:  #optative_mood__optative  a mood (as in Greek or Sanskrit) that expresses a wish or hope; expressed in English by modal verbs
     subtype:  #imperative_mood__imperative__jussive_mood__jussivemood  a mood that expresses an intention to influence the listener's behavior
     subtype:  #interrogative_mood__interrogativemood__interrogative  some linguists consider interrogative sentences to constitute a mood
  subtype:  #anaphoric_relation__anaphoricrelation  the relation between an anaphor and its antecedent
  subtype:  #voice.grammatical_relation  (linguistics) the grammatical relation (active or passive) of the grammatical subject of a verb to the action that the verb denotes
     subtype:  #active_voice__active  the voice used to indicate that the grammatical subject of the verb is performing the action or causing the happening denoted by the verb; "`The boy threw the ball' uses the active voice"
     subtype:  #passive_voice__passivevoice__passive  the voice used to indicate that the grammatical subject of the verb is the recipient (not the source) of the action denoted by the verb; "`The ball was thrown by the boy' uses the passive voice"; "`The ball was thrown' is an abbreviated passive"
  subtype:  #inflexion__inflection  a change in the form of a word (usually by adding a suffix) to indicate a change in its grammatical function
     subtype:  #conjugation.inflexion  the inflection of verbs
     subtype:  #declension.inflexion  the inflection of nouns and pronouns and adjectives in Indo-European languages
     subtype:  #paradigm  systematic arrangement of all the inflected forms of a word
  subtype:  #aspect.grammatical_relation  the beginning or duration or completion or repetition of the action of a verb
     subtype:  #perfective_aspect__perfective  the aspect of a verb that expresses a completed completed action
     subtype:  #durative_aspect__durative  the aspect of a verb that expresses its duration
        subtype:  #imperfective_aspect__imperfective  aspect without regard to the beginning or completion of the action of the verb
        subtype:  #progressive_aspect__progressiveaspect  the aspect of a verb that expresses its on-going action
     subtype:  #inchoative_aspect  aspect with regard to the beginning of the action of the verb

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