How is the genitive (possessive) case commonly shown in Modern English nouns?

In Modern English, the genitive case, which indicates possession, is typically shown using 's (apostrophe s) added to the end of the noun. Here's a breakdown:

Singular Nouns:

* For most nouns: Add 's to the end of the word.

* Example: The dog's bone.

* For nouns ending in 's': You can either add 's or just an apostrophe (').

* Example: The boss's office (or) The boss' office.

Plural Nouns:

* For plural nouns ending in 's': Add only an apostrophe (').

* Example: The students' books.

* For plural nouns not ending in 's': Add 's.

* Example: The children's toys.

Exceptions:

* Pronouns: These use special forms for the possessive case (e.g., my, your, his, hers, its, our, their).

* Compound Nouns: Add 's to the last word of the compound.

* Example: My mother-in-law's birthday.

* Proper Nouns: Follow the general rules but be aware of potential pronunciation changes.

* Example: Shakespeare's plays, Jesus's teachings.

It's important to remember that these are general rules, and some exceptions exist.

Do you have any specific examples you'd like help with? I'm happy to provide more detailed explanations or examples.