1. English grammar refers to the rules and structure of the English language including word classes, phrases, clauses, sentence structure, negation, and history.
2. There are two main approaches to grammar - descriptive grammar studies how language is actually used while prescriptive grammar focuses on defining correct usage.
3. The earliest published English grammar was in 1586, but English grammars were often written in Latin for many years due to the influence of Latin grammar in education.