There are only two cases of nouns in English: possessive case and common case.
The lesson shows the formation of cases and gives examples of the occurrencesoccurrencesnof possessive case of nouns.
Possessive Case where nouns take the special ending; and
Common Case where nouns don’t have any ending.
Singular nouns form their possessive case by adding ‘s to the singular.
* The boy’s dog
* My father’s office
Only the apostrophe (‘) without s is added if the noun contains too many hissing sounds.
* for goodness’sake
* for conference’s sake
Plural Nouns ending in -s form their possessive case by adding only an apostrophe.
* boys’ school
Plural Nouns that do not end in -s, form the possessive case by adding ‘s.
* Children’s books
Uses of the possessive case
The possessive case is now used chiefly with the names of living things.
*the lion’s mane
*the minister’s bodyguards
The possessive case is not normally used with the names of lifeless things; instead, we use a structure with of
* The leg of the table (NOT The table’s leg)
* The cover of the book (NOT The book’s cover