1. Grammatical Case

2. Grammatical Case
A case is a special grammatical category whose value reflects the grammatical function performed by a noun, pronoun, adjective, participle or numeral in a phrase, clause or sentence.

3. Types of cases Nominative: Subject of a finite verb
Accusative: Direct object of a transitive verb
Dative: Indirect object of the verb
Genitive: Possessor of a noun
Instrumental: Object used in performing action
Locative: Indicates a location
Ablative: Indicates movement away from something
Vocative: Refers to the addresse

4. Case hierarchy
Nominative > Accusative or Ergative > Genitive > Dative > Locative > Ablative > Instrumental > Vocative > Others