Grammatica del testo e del discorso: dinamicità informativa e origini dialogiche di diverse strutture sintattiche

The paper discusses the issue of grammar, seen as a dynamic system which proceeds from discourse to sentence (and not viceversa), and as naturally emerging from interactional discourse processes. In particular, the role of dialogical repetitions is highlighted through the analysis of spoken and written data which show the interactional making of two different types of constructions: 1) Echo+Comment constructions, which can often produce, or results in, different tipes of left dislocations and hanging topic constructions; 2) Comment+Echo constructions, which can sometimes produce, or result in, specific types of cleft sentences.