* Usage: Language is constantly evolving. As people speak and write, patterns emerge. These patterns, over time, become accepted as the "rules" of the language.
* Prescriptive Grammarians: These are individuals, often linguists or teachers, who try to codify the language and establish clear rules. They often base their work on established usage, but they may also introduce new rules based on their understanding of logic or aesthetics.
* Dictionaries and Style Guides: These resources provide guidance on the accepted usage of words and grammar. While they are not definitive authorities, they reflect the current state of the language.
* Linguists: They study the structure and evolution of language. Their research helps us understand how language works and how it changes over time.
* Social Influence: Language is also influenced by social factors. What is considered "correct" grammar can vary depending on geographical location, social class, and other factors.
* The Power of the People: Ultimately, the language evolves because people use it in new ways. If enough people start using a particular grammatical structure, it becomes part of the accepted standard.
So, while there's no single "grammar dictator," the evolution of English grammar is a result of a combination of these factors. It's an ongoing process, with the language continuously adapting and changing.