In this paper, motivated by problems related to grammar teaching, we propose a description of some noun subordinate clauses from an interdiscursive perspective. Based on the principles of the Functional Discourse Grammar theory (HENGEVELD; MACKENZIE, 2008), we observed some subjective aspects encoded by these syntactic constructions, motivated by the Speaker's communicative intentions. In pragmatic terms, the complement clauses we studied correspond to the Speaker's strategies to demonstrate his commitment degree with what he's saying, protecting his/her face, and also assuring the information's reliability; in linguistic terms, they show the language suffers some adaptations (BYBEE, 2010) to serve the Speaker's communicative needs. We believe that the focus in the functionality of these constructions can make its teaching richer and more efficient, and so the students' language performance.
Syntax; Complex clause; Functional approach; Complexity; Description; Teaching