And so we run up against one of the more badly misnamed things in English grammar: the possessive. Yes, yes, it's true, we do use it to indicate possession: John's chair, Mary's house, ...

A possessive is a word that shows possession or ownership of something. A possessive can be a noun, pronoun or adjective. Nouns are usually made possessive by adding an apostrophe and an ‘s ...

A singular noun is a noun referring to just one person or thing, for example 'cat'. When you want to show that something belongs to that person or thing, you add a possessive apostrophe and an 's ...