This article describes the usage of partial interrogatives without wh such as And you went…? in French and Spanish, and analyses the variation between such in-situ-Ø and in-situ-wh-interrogatives such as And you went where? On the basis of an analysis of in-situ-Ø-interrogatives in a corpus of spoken French and Spanish, these interrogatives are described as a particularly efficient means of realizing an information request. Due to the fact that their use is bound to contexts in which the information request is highly expected by the hearer, they can be produced using a minimal syntactic format and simultaneously ensure that the addressee produces the desired response. In comparison, the use of in-situ-wh is less context-sensitive. The analysis also investigates the possibility of differences between French and Spanish as regards the productivity of these interrogatives. An acceptability study of these interrogatives finds no significant difference in terms of the productivity and acceptability of in-situ-Ø in French and Spanish, whereas in-situ-wh reaches a higher acceptability in French than in Spanish. I interpret these results as evidence for a description of in-situ-Ø as an ad-hoc interactional resource whose use does not depend on conventionalization processes, whereas information-requesting in-situ-wh has become conventional in French
