Case Grammars (FILLMORE’s
Grammar)
Case grammars use the functional relationships between noun phrases and
verbs to conduct the more deeper case of a sentence. Generally in our English
sentences, the difference between different forms of a sentence is quite
negligible. In early 1970’s Fillmore gave some idea about different cases of a
English sentence. He extended the transformational grammars of Chomsky by
focusing more on the semantic aspects of view of a sentence. In case grammars a
sentence id defined as being composed of a preposition P, a modality
constituent M, composed of mood, tense, aspect, negation and so on. Thus we can
represent a sentence like
Where P - Set of relationships
among verbs and noun phrases i.e. P = (C=Case)
M - Modality constituent
For example consider a sentence “Ram did not eat th e apple”.
The tree representation for a case grammar will identify the words by
their modality and case. The cases may be related to the actions performed by
the agents, the location and direction of actions. The cases may also be
instrumental and objective. For example “Ram cuts the apple by a knife”. Here
knife is an instrumental case. In fig 8.5 the modality constituent is the
negation part, eat is the verb and Ram, apple are nouns which are under the
case C1 and C2 respectively. Case frames are provided for verbs to identify allowable
cases. They give the relationships which are required and which are optional.
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