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The Gramática Houaiss is not merely a rulebook; it is a descriptive masterpiece. Unlike prescriptive grammars that strictly tell you how to write, the Houaiss grammar often documents how the language is used in Brazil, detailing nuances, variations, and the structural logic behind the syntax. It covers phonetics, morphology, and syntax with a level of detail that serves everyone from high school students to PhD researchers.

Unlike traditional grammars that rely heavily on classic literary examples (e.g., Camões), Azeredo uses modern journalistic sources like Folha de S.Paulo to reflect current standard written usage.