NGB is an acronym that means Brazilian Grammatical Nomenclature, which refers to the set of words established for use in grammar.
The NGB aims to standardize the grammatical nomenclature in use in the country, in schools and in didactic literature.
Nomenclature is the set of terms referring to an art or science, it is a relation, a catalogue. Grammatical is related to grammar, that is, the book that sets out the rules of language. Therefore, "Brazilian Grammatical Nomenclature" is a relationship that establishes a unified terminology to be adopted in Brazilian grammar.
NGB, Brazilian Grammatical Nomenclature, prepared by philosophers and linguists, was established by an ordinance of the Ministry of Education and Culture and recommended for adoption in the programmatic teaching of the Portuguese language and in activities aimed at verifying learning, in establishments of teaching and covers the three divisions of grammar: Phonetics, which refers to the sound elements of language, eg unstressed and stressed words, diphthong tritongo and hiatus etc. Morphology, referring to forms and transformations of words, eg prefix, suffix, verb, adverb etc., and Syntax that it is the arrangement of words in sentences and sentences in speech, eg subject, predicate, clause, subordinate clause etc.