Case grammar¶

A linguistic analysis in which a predicate selects a case frame of semantic roles that its participants fill beneath their surface syntactic realization.

Version: v2 · 2026-09-19 · History
Domain-specific #: 3601
Domain group: Humanities
Origin domain: Linguistics & Semiotics
Subdomain: Linguistic Theory → Linguistics & Semiotics

Core Idea¶

Deep cases are semantic roles rather than morphological case endings, inventories differ across formulations and the same role may surface through different grammatical constructions. A verb or other predicate specifies a valency frame of roles such as Agent, Object, Instrument or Beneficiary, and transformations map those role-bearing participants into surface clauses. The abstraction is therefore identified by a declared carrier, a transformation or constraint over that carrier, and an invariant that tells an analyst whether the named structure is genuinely present.

How would you explain it like I'm…

Who Does What With What

In 'Sam broke the window with a rock,' Sam is the one doing it, the window is what gets broken, and the rock is the tool. Case grammar says every action word comes with a set of jobs like doer, thing, and tool. The jobs stay the same even when you say the sentence differently, like 'The rock broke the window,' where the rock is still the tool.

The Roles a Verb Needs

Case grammar is a way of studying sentences by looking at the roles that people and things play in an action. A verb like 'open' comes with a set of roles, like who does it (the Agent), what gets opened (the Object), and what you use (the Instrument). The same role can show up in different spots in a sentence: 'Sam opened the door with a key' and 'The key opened the door' both have a key as the Instrument. These roles are about meaning, not about the word endings some languages use, which are also called 'cases'. Different linguists have made slightly different lists of these roles.

Semantic-Role Case Frames

Case grammar is a linguistic theory in which verbs and other predicates specify a case frame: a set of semantic roles, called deep cases, that their participants play, such as Agent, Object, Instrument or Beneficiary. These deep cases are about meaning, not the grammatical case endings some languages put on nouns. The theory says sentences are formed by taking these role-bearing participants and mapping them, through transformations, into surface positions like subject and object. So the same role can appear in different grammatical forms, as when an Instrument appears either as the subject or in a 'with' phrase. Different versions of the theory use different lists of roles, so an analysis must say which version it follows.

Case grammar is a framework in which a verb or other predicate, in a given lexical sense, specifies a valency frame of semantic roles, deep cases, such as Agent, Object, Instrument, and Beneficiary, that its participants bear. Deep cases are semantic roles rather than morphological case endings, and the inventory of roles differs among formulations of the theory. The case frame states which roles are required and which are optional, and imposes constraints on which roles can co-occur. Transformations then map the role-bearing participants onto surface clause structure as subjects, objects, obliques, or adjuncts, so the same role may surface through different grammatical constructions, as in alternations where an Instrument appears as subject. A proper case-grammar analysis therefore specifies the predicate and its sense, the participant inventory, the named roles, valency and optionality, co-occurrence constraints, the mapping to surface arguments and adjuncts, the treatment of alternations, and the theoretical version adopted. Treating deep cases as morphological cases, or as a fixed universal list, misreads the theory.

Scope of Application¶

Case grammar belongs to linguistic theory and is useful where the analyst can specify the typed linguistic theory carrier, including objects, relations, parameters, conventions, evidence, boundaries, and comparison targets, then evaluate the predicate and lexical sense, participant inventory, named semantic roles, case-frame valency and optionality, constraints on role co-occurrence, mapping to surface arguments and adjuncts, treatment of alternations and the adopted theoretical version are explicit. The scope is broad within that domain but bounded by the need for the predicate and lexical sense, participant inventory, named semantic roles, case-frame valency and optionality, constraints on role co-occurrence, mapping to surface arguments and adjuncts, treatment of alternations and the adopted theoretical version are explicit.

Clarity¶

The abstraction clarifies a crowded vocabulary by making the predicate and lexical sense, participant inventory, named semantic roles, case-frame valency and optionality, constraints on role co-occurrence, mapping to surface arguments and adjuncts, treatment of alternations and the adopted theoretical version are explicit the center of the account. A claim should name the carrier, the governing operation or relation, the applicable assumptions, and the recognition test.

Manages Complexity¶

Without the abstraction, an analyst must reason directly over many local details: the carrier roles, admissibility assumptions, competing conventions, derived invariants, boundary cases, and proof or validation obligations specific to Case grammar. Case grammar compresses them into the roles in the structural signature. That compression permits comparison across instances without erasing the variables that determine validity. It also exposes which details may be varied safely and which are constitutive.

Abstract Reasoning¶

Identify the carrier. State what the elements, states, objects, or observations are: the typed linguistic theory carrier, including objects, relations, parameters, conventions, evidence, boundaries, and comparison targets. Reject examples whose alleged carrier belongs to a different problem.
Lock the constitutive rule. Express the predicate and lexical sense, participant inventory, named semantic roles, case-frame valency and optionality, constraints on role co-occurrence, mapping to surface arguments and adjuncts, treatment of alternations and the adopted theoretical version are explicit independently of one notation or implementation.

Knowledge Transfer¶

Knowledge transfers strongly among subfields of linguistic theory because they reuse the typed linguistic theory carrier, including objects, relations, parameters, conventions, evidence, boundaries, and comparison targets, A verb or other predicate specifies a valency frame of roles such as Agent, Object, Instrument or Beneficiary, and transformations map those role-bearing participants into surface clauses., and type the carrier, state every parameter and convention in the definition, test that the predicate and lexical sense, participant inventory, named semantic roles, case-frame valency and optionality, constraints on role co-occurrence, mapping to surface arguments and adjuncts, treatment of alternations and the adopted theoretical version are explicit, compare the nearest accepted identity, and report counterexamples, uncertainty, and limiting cases.

Relationships to Other Abstractions¶

Current abstraction Case grammar Domain-specific

Parents (1) — outgoing typed relations

Case grammar is a kind of Relation Prime

It remains its own entry because its identity is fixed by the predicate and lexical sense, participant inventory, named semantic roles, case-frame valency and optionality, constraints on role co-occurrence, mapping to surface arguments and adjuncts, treatment of alternations and the adopted theoretical version.

Hierarchy path (1) — routes to 1 parentless root

Case grammar → is a kind of Relation

Neighborhood in Abstraction Space¶

Case grammar sits in a crowded region of the domain-specific corpus (5^th percentile for distinctiveness): several abstractions share nearly its structure, so a description that fits it tends to fit its neighbors too.

Family — Syntax, Semantics & Grammar Theory (24 abstractions)

Nearest neighbors

Computed from structural-signature embeddings · 2026-10-25