Spanish grammar is the set of rules that govern how words are used and structured in the Spanish language. It includes aspects like sentence formation, verb conjugation, and noun-adjective agreement. Understanding these rules helps speakers communicate clearly and effectively. One key feature of Spanish grammar is the use of gender for nouns, which can be either masculine or feminine. For example, the word libro (book) is masculine, while mesa (table) is feminine. Additionally, verbs change form based on the subject and tense, making it essential to learn conjugation patterns for proper communication.