The purpose of this article is to analyse the prosody of a female speaker of Spanish from Medellín, Colombia. The corpus, which was collected using the methods of the AMPER project, consisted of a fixed corpus of expanded declarative and interrogative sentences. The parameters analysed were vowel duration and intensity as well as fundamental frequency (F0), which was examined using the Autosegmental-Metrical (AM) model.The results show that both tonal peaks in sentence subjects as well as the behaviour of F0 in prepositional phrases help differentiate the two sentence modalities (declarative and interrogative).