This article intends to analyze and revise some aspects of the generative methodology when the latter is to be applied to describe correctly the organization of the syntactic component of a language. When considering a specific problem such as that of passivity, the analysis of the organizational principles of the standard (and extended) theory reveals the heterogeneity of the syntactic phenomena which are supposedly to be analysed by the same principles and an incapability to distinguish explicitly between relations based on meaning and on designation. Hence it is here claimed that the analysis of the same phenomena is made possible only if the general structure of the model be modified to include as underlying level of represent...