Definition
In linguistic typology, a direct case (also called a nominative–accusative case or core case) is a grammatical case that marks the argument of a verb which is in the syntactic position of the subject of an intransitive clause, the agent of a transitive clause, and, in many languages, the patient of a transitive clause. Direct cases are contrasted with oblique (or non‑core) cases, which typically mark peripheral arguments such as indirect objects, instruments, locations, and other adjuncts.
Overview
The direct case system is a subclass of the more general nominative–accusative alignment found in many Indo‑European languages (e.g., English, German, Latin) as well as in a variety of non‑Indo‑European languages (e.g., Hungarian, Basque). In languages with a direct–oblique split, the set of direct cases may include the nominative, accusative, and sometimes other core cases (e.g., the dative in certain contexts). The term is particularly used in the description of languages that distinguish a core set of cases (direct) from a peripheral set (oblique), rather than strictly labeling cases by their semantic role.
Etymology/Origin
The phrase “direct case” derives from the functional description of the case’s role in clause structure: it directly marks the core arguments that participate in the core event described by the verb. The terminology entered the linguistic literature in the mid‑20th century, primarily within the framework of case grammar and typological studies of case alignment.
Characteristics
- Core Argument Marking: Direct cases typically encode the subject of intransitive verbs and the agent of transitive verbs; the patient of transitive verbs may also be marked by a direct case (accusative) in nominative–accusative languages.
- Morphological Realization: Direct cases are often expressed by distinct inflectional morphemes (suffixes, prefixes, or clitics) that differ from those used for oblique cases.
- Syntactic Behavior: Arguments marked with direct cases usually have syntactic privileges such as higher ranking in phrase‑structure rules, obligatoriness in clause‐level argument structure, and compatibility with certain control and raising constructions.
- Cross‑Linguistic Variation: The composition of the direct case set varies across languages. For example, Hungarian treats the nominative, accusative, and dative as direct cases, while Finnish restricts direct cases to nominative and accusative, with the remaining cases classified as oblique.
- Interaction with Alignment Systems: Direct case systems are a hallmark of nominative–accusative alignment. In languages with split alignment (e.g., split‑ergative or split‑accusative), the assignment of direct cases may be conditioned by factors such as tense, aspect, or person.
Related Topics
- Grammatical case – The broader category of morphological marking of noun phrases.
- Nominative case – The case traditionally used for the subject of a clause.
- Accusative case – The case traditionally used for the direct object of a transitive verb.
- Oblique case – Cases that mark peripheral arguments, contrasted with direct cases.
- Ergative‑absolutive alignment – An alternative alignment system where the core argument of an intransitive verb aligns with the patient of a transitive verb.
- Morphosyntax – The study of how morphological and syntactic structures interact, including case systems.
- Case typology – The classification of languages based on their case systems and alignment patterns.