Writeability

The apostrophe accompanied by an s is used to indicate possession.

•'s - apostrophe  -s
Add 's to the singular form of the word, even if it ends in -s:

Example:
the butcher's cat
James's apartment
 
Add 's to the plural forms of words that do not end in -s:

Example:
children's toys
the geese's nests

Add 's to the end of compound words:

Example:
my mother-in-law's cooking

Add 's to the last noun to show joint possession:

Example:
Vicky and Christina's vacation

• ' - the apostrophe
Add ' to the end of plural nouns that already end in -s:

Example:
all employees' desks
brothers' names