what are possesive nouns?

Possessive nouns are those that show ownership. We add an apostrophe to a noun to make it possessive.

Examples:

child's toys
children's toys
dog's collar
dogs' collars

Possessive nouns are those which show ownership of the immediately following noun. (The term "ownership" needs to be understood very broadly.)

This is the boy's jacket. (boy's = possessive; boy owns jacket)

The radio's AM stations don't work. (radio's = possessive; radio "owns" stations)

My sisters' children all came over for Thanksgiving. (sisters' = plural possessive; sisters "own" children)

http://grammar.ccc.commnet.edu/grammar/possessives.htm

jackets, jacket's which is correct possessive noun

Possessive nouns are nouns that show ownership or possession. They are formed by adding an apostrophe (') and the letter "s" ('s) to the end of the noun. For example:

- Sara's book (the book belonging to Sara)
- The dog's bone (the bone belonging to the dog)
- The students' backpacks (the backpacks belonging to the students)

To identify possessive nouns in a sentence, you can ask yourself "Whose is it?" or "Who does it belong to?" If the noun answers these questions, it is likely a possessive noun.

Remember that not all singular nouns need to have an apostrophe-s ('s) to indicate possession. In some cases, only an apostrophe (') is added after the noun ending in "s":

- The boys' toys (the toys belonging to the boys)
- The teachers' lounge (the lounge belonging to the teachers)

For plural nouns that do not end in "s," you add apostrophe-s ('s) to show ownership:

- The children's room (the room belonging to the children)

If the plural noun already ends in "s," you typically only add an apostrophe ('):

- The cats' food (the food belonging to the cats)

By understanding the concept and following the rules for forming possessive nouns, you can easily identify and use them correctly in your writing.