The possessive form of the noun idea is idea's.
Example: Her idea's brilliance surprised everyone.
The singular possessive form is word's, for example the word's definition.
possessive form of the word Cathi: Cathi's
possessive form of the word glass: glass'
The possessive form of the word fairy is fairy's.
The possessive form is Lindbergh's.
The possessive form of the noun captain is captain's."That is our captain's idea."
The singular possessive form is word's, for example the word's definition.
possessive form of the word glass: glass'
possessive form of the word Congress: Congress'
possessive form of the word Cathi: Cathi's
possessive form for the word holders: holders'
The possessive form of the word fairy is fairy's.
The possessive form of the word dictionary is dictionary's.
the possessive form of the word Cathie: Cathie's
The possessive form is Lindbergh's.
The possessive form is weaver's.
The possessive form for the interrogative pronoun who is whose.