3. Write two sentences, one that uses the possessive case of a plural noun ending in s and one that uses the possessive case of a plural noun not ending in s.

Possessive case of a plural noun ending in -s:

- I didn't have the time to wash the girls' dresses.

Possessive case of a plural noun not ending in -s:

- People's manners have greatly improved after the workshop on empathy.

Explanation:

The possessive case, also known as the genitive case, usually consists in the addition of 's to the ending of a noun to indicate that that noun is the possessor of something. For example: Sheila's books. / Erica's mother. / John's letters.

When the noun already ends in -s in its plural form, all we need to do is add the apostrophe to indicate the possessive case:

- I didn't have the time to wash the girls' dresses.

When the noun has a plural form that does not end in -s, we need to add 's just like we would to its singular form:

- People's manners have greatly improved after the workshop on empathy.