Research on left periphery phenomena has increased in the last 20 years, resulting in consistent studies from a wide range of languages and a fruitful debate on the functional projections within the CP system. Throughout these years, important contributions have been made on Brazilian Portuguese, especially on wh-interrogative sentences, focalization, topicalization and relative clauses. As for exclamative and imperative sentences, however, there is a considerable research gap in all grammatical levels. Regarding interrogatives, semantic and prosodic studies are still lacking (as well as research on the acquisition and processing of these constructions). This collected volume fills some of those gaps, gathering studies on wh-exclamatives, imperatives and wh-questions in Brazilian Portuguese which approach syntactical, semantical and prosodic aspects of these constructions through a rich and yet unregistered set of data. They also deliver novel acquisition and diachronic data that will further both the comprehension of Brazilian Portuguese grammar and the ongoing discussions on left periphery phenomena.