Case grammar is a linguistic analysis system that focuses on the relationship between a verb's valence, or number of subjects and objects, and the required grammatical context. It was created by Charles J. Fillmore in 1968 as part of transformational grammar. Case grammar analyzes sentence structure by studying the combination of deep cases like agent, object, and beneficiary required by specific verbs. For example, the verb "give" requires an agent, object, and beneficiary. During the 1970s and 1980s, Fillmore expanded his original theory into frame semantics.

1. Karen González
Miguel Jara

3.  Case Grammar is a system of linguistic analysis,
focusing on the link between the valence, or number
of subjects, objects, etc., of a verb and the grammatical
context it requires. The system was created by the
American linguist Charles J. Fillmore in (1968), in the
context of Transformational Grammar.

4. Example
 This theory analyzes the surface syntactic structure of
sentences by studying the combination of deep cases
(i.e. semantic roles) -- Agent, Object, Benefactor,
Location or Instrument—which are required by a
specific verb. For instance, the verb "give" in English
requires an Agent (A) and Object (O), and a
Beneficiary (B); e.g. "Jones (A) gave money (O) to the
school (B).

5.  Case frames are subject to certain constraints, such as
that a deep case can occur only once per sentence.
Some of the cases are obligatory and others are
optional. Obligatory cases may not be deleted, at the
risk of producing ungrammatical sentences.
 For example, Mary gave the apples is ungrammatical in
this sense.

6.  During the 1970s and the 1980s, Charles Fillmore
developed his original theory onto what was called Frame
Semantics.
 Walter A. Cook, SJ, a linguistics professor at Georgetown
University, was one of the foremost case grammar
theoreticians following Fillmore's original work.