Some kinds of hypothetical correlative structures are quite naturally associated with situations of spoken dialogs as they share a number of specific features characteristic of this kind of spoken discourse : 1) the fact that speaker and addressee interplay directly in discursive exchanges, 2) the fact that the correlative relation between the hypothesis emerging from P and the consequence contained in Q is expressed through grammatical constructions and enunciative devices based on modal constituents, speech acts, imperative structures, etc., 3) the fact that the correlative sequence must show a definite prosodic pattern (a suspensive pause on P preceding a falling intonation on Q). On the basis of these different factors, I will examine two main structure types, one with et ‘and’ representing the hypothesis si p inferred from P, the other with ou ‘or’ bringing about the hypothesis issued from P but endowed with the opposite value.