1. Case is a grammatical category that shows the relationship between words in a sentence. It defines the syntactic relationships between nouns, pronouns, and adjectives and the verb or preposition they relate to.
2. Languages like Latin and Pitta-Pitta have complex case systems with suffixes that mark different grammatical roles. In Latin there are 6 cases and Pitta-Pitta has 8 cases including nominative, ergative, accusative, dative, and others.
3. English has lost most of its case system but retains some forms like possessive 's and pronouns having nominative and oblique cases. Other Germanic languages like Old English had richer case systems