The two possible positions for wh-words (i.e., in situ or preposed) represent a long-standing area of research in French. The present study reports on statistical analyses of a new seminaturalistic corpus of child L1 French. The distribution of the wh-words is examined in relation to a new verb tripartition: Free be forms, the Fixed be form c’est ‘it is’, and Other Verbs. Results indicate that a discriminating variable is verb form (i.e., Free vs. Fixed), regardless of verb type (i.e., be vs. Other Verbs), and that there is a correlation between the wh-in-situ position and the Fixed be form. The Fixed be form is thus identified as the component that leads to wh-in-situ utterances, in contrast to other languages such as English. Overuse of the Fixed be form in child speech could also account for the predominance of wh-in-situ in child object questions compared to adjunct questions and child wh-questions in general compared to adult questions