Here's a breakdown:
* Possession: The genitive case shows that one noun belongs to or is owned by another noun.
* Example: "The dog's bone" (The bone belongs to the dog.)
* Close Relationship: It can also express a close relationship, such as origin, part of, or association.
* Example: "The city's history" (The history is of the city.)
How to form the genitive:
* For singular nouns, add an apostrophe and "s" ('s): "The cat's tail"
* For plural nouns ending in "s", add only an apostrophe: "The cats' food"
* For plural nouns not ending in "s", add an apostrophe and "s": "The children's toys"
Alternatives to the genitive:
* "Of" phrase: Instead of "The dog's bone", you could say "The bone of the dog."
* Possessive pronouns: "His book" instead of "The man's book"
Important note:
The genitive is not used in all languages. English is one of the few that retains a distinct genitive case.