Grammar types refer to the different categories of grammatical structures used in a language. The main types include descriptive grammar, which describes how language is actually used by speakers, and prescriptive grammar, which sets rules for how language should be used. Other types include generative grammar, focusing on the innate rules that govern sentence formation, and functional grammar, which emphasizes the role of language in communication. Each grammar type serves a unique purpose in understanding and analyzing language. For instance, descriptive grammar helps linguists observe real-world language use, while prescriptive grammar guides learners in adhering to standard language conventions. Understanding these types can enhance both language learning and teaching.