Ergative–absolutive alignment

In linguistic typology, ergative–absolutive alignment is a type of morphosyntactic alignment in which the subject of an intransitive verb behaves like the object of a transitive verb, and differently from the subject of a transitive verb. All known ergative languages show ergativity in their morphology, and a small portion also show ergativity in their syntax.

The ergative-absolutive alignment is in contrast to nominative–accusative alignment, which is observed in English, where the single argument of an intransitive verb behaves grammatically like the agent (subject) of a transitive verb but different from the object of a transitive verb. In ergative–absolutive languages with grammatical case, the case for the single argument of an intransitive verb and the object of a transitive verb is called the absolutive, and the case used for the agent of a transitive verb is called the ergative.

By one measure, 17% the world's languages use an ergative alignment in the marking of noun phrases. Examples of ergative-absolutive languages include Basque, Georgian, Mayan, Tibetan, Sumerian, and certain Indo-European languages such as Pashto, the Kurdish languages and many others.

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