A progressive pronoun is a type of pronoun that changes form depending on the context in which it is used. It is also known as an inflected pronoun, and is used to indicate the number, gender, and case of the noun it replaces. Examples of progressive pronouns include 'they, ' 'THEM, ' and 'their.' These pronouns are used to refer to people or things in a non-specific way, and can be used to refer to both singular and plural nouns.