Possessive nouns are used to show ownership. Dad’s car is for sale!
The doctor’s coat is white. The word “doctor's" is the possessive noun. It tells you that the noun “coat" belongs to the doctor. The doctor owns, or possesses the coat. Add 's to the end of a singular noun to make it possessive.
The kite’s string got stuck in a tree. kite + 's The string belongs to the kite.
The children's costumes were cute. Add 's to the end of an irregular plural noun. children + 's The costumes belong to the children.
My brothers' names are Denny and Dan. brothers + ' If the noun ends in s or is a plural (more than one), you can just add an apostrophe '