This paper aims to present an ongoing large-scale classification of Brazilian Portuguese adjectives. The 2,000 most frequent adjective lemmas in a reference corpus, corresponding to 88% of the occurrences of adjectives, were classified into predicative and non-predicative. The former were further classified based on argument number (one or two) and type (noun phrase or clause), which led to six different classes of predicative adjectives plus two sub-classes. The results suggest that the most representative class is non-predicative adjectives, followed by intransitive adjectives with noun phrase and clausal subjects, respectively.