This paper aims at describing some of the main structural and functional characteristics of completive clauses governed by verba dicendi et sentiendi in Boethius's De consolatione philosophiae. The characteristics of the use of the Accusativus cum Infinitivo (AcI) will be analysed in comparison with the uses of other Latin authors. The data will be described on the basis of two main aspects: constituent order, and the coreferentiality of the subject of the AcI with elements in the main clause. Compared to the predominance of AcI constructions, quod-clauses show a consistent pattern and are limited to well- defined contexts. Some aspects of the use of quin and ut will also be described. Special attention will be given to the problems of syntactic and semantic interpretation of the governing verbs, which can be difficult to define clearly. This study will also set the ground for further research on the influence of Boethius's Latin model on Italo-Romance literary texts in the Middle Ages, both on the syntactic and the stilistic level.