Agent (grammar)
- Agent (grammar)
In
linguistics , a grammatical agent is theparticipant of a situation that carries out the action in this situation. Also, "agent" is the name of thethematic role (also known as the thematic relation) with the above definition. The word comes from a participle of the Latin verb "agere", to do.Typically, the situation is denoted by a sentence, the action by a
verb in the sentence, and the agent by anoun phrase .For example, in the sentence "Jack kicked the ball", "Jack" is the agent. In certain languages, the agent is declined or otherwise marked to indicate its grammatical role. In Japanese, for instance, the agent is typically affixed with |ga| (the
hiragana が). Although Modern English does not mark grammatical role, agency is informally represented using certain conventions; for instance, with themorpheme s "-ing", "-er", or "-or", as in "eating", "user", or "prosecutor". (Cf.agent noun .)The notion of agency is easy to grasp intuitively but notoriously difficult to define: typical qualities that a grammatical agent often has are that it has volition, is sentient or perceives, causes a change of state, or moves. The linguist David Dowty included these qualities in his definition of a Proto-Agent, and proposed that the nominal with the most elements of the Proto-Agent and the fewest elements of the Proto-Patient tends to be treated as the agent in a sentence [Dowty, David. 1991. "Thematic proto-roles and argument selection", "Language", 67.3:547-619] . This solves problems that most semanticists have with deciding on the number and quality of thematic roles. For example, in the sentence "His energy surprised everyone", "His energy" is the agent, even though it does not have most of the typical agent-like qualities such as perception, movement, or volition.
The grammatical agent is often confused with the subject, but these two notions are quite distinct: the former is based explicitly on its relationship to the
verb , whereas the latter is based on the flow of information, word order, and importance to the sentence. In a sentence such as "The boy kicked the ball", "the boy" is the agent "and" the subject. However, when the sentence is rendered in thepassive voice , "The ball was kicked by the boy", "the ball" is the grammatical subject, but "the boy" is still the agent. Many sentences in English and otherIndo-European languages have the agent as subject.References
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