You can think of most possessive
nouns as name tags on suitcases. The name tag tells who owns the suitcase. In
the same way, the possessive form of a noun shows ownership or possession. The
possessive form usually answers the question, “whose”.
For
example: Rachel’s house, the kitten’s fur, Henry’s watch.
The possessive form, however,
does not always denote possession. Sometimes it is used to denote authorship,
origin, etc.
For
example: Shakespeare’s plays, a mother’s love, an umbrella’s protection.
The possessive case is
generally used with living things.