* Singular nouns: Add 's to the end of the noun.
* Example: "The dog's bone," "The child's toy"
* Plural nouns ending in 's': Add an apostrophe after the 's'.
* Example: "The students' books," "The cats' food"
* Plural nouns not ending in 's': Add 's.
* Example: "The children's game," "The men's club"
* Proper nouns ending in 's': Add an apostrophe after the 's'.
* Example: "Jesus' teachings," "Charles's car"
Other ways to show the genitive case:
While the 's genitive is the most common, there are a few other ways the genitive case can be shown in English:
* Of-phrase: This is more common for inanimate objects.
* Example: "The roof of the house, " "The color of the sky"
* Double genitive: Used for a part of a whole belonging to someone.
* Example: "A friend of mine's," "A book of John's"
Important Note: The genitive case is not always used in English. Sometimes it's clearer to use a prepositional phrase instead:
* Example: "The car belonging to John" instead of "John's car"
Ultimately, the choice of how to express the genitive case depends on the specific context and the desired level of formality.