Case grammar is a type of generative approach that stresses the semantic relationship of elements in a sentence. This grammar takes the verb as the most important part of the sentence, marking the relationships between the verb with various noun phrases as “cases”. Fillmore's argument is based on the assumptions that syntax should be central in the determination of case and that covert categories are important. The various ways in which cases occur in simple sentences define sentence types and verb types of a language. Case grammar shows clear semantic relevance of notions such as agency, causation, location, advantage to someone, etc. There are easily identifiable across languages, arid are held by many psychologists to play an important part in child language acquisition.