The use of the subjunctive in spoken Brazilian Portuguese language has been much discussed in the last decades. Much is said about the death of the subjunctive, assuming as real the hypothesis that modalities traditionally expressed by the subjunctive are no longer being expressed by this mood, or on the way. This study aims to analyze the use of modalities expressed by the subjunctive and the infinitive in complement clauses selected by non-factive verbs of the volitive and request/recommendation semantic areas. Thus, in this dissertation, we analyze not only structures in which the subjunctive and the infinitive are used to express these modalities, considering the main and the subordinate clauses subjects as a criteria for mood choice, but also clauses in which these modalities are expressed with the use of Alternative Structures. Since this research focus on spoken language rules description, we did this systematization according to the Functional Discourse Grammar (FDG) and selected as object of study the Portuguese language Brazilian educated class and media use. That way, this dissertation contributes to an area of the Brazilian Portuguese language description that, in general, needs to be detailed and updated in Traditional Grammars and Portuguese language as native or second language books.