In this paper, we will offer a brief review of how it has been defined the subjunctive mood and in what syntactic contexts may appear. There have been very particularistic definitions are based on the various meanings that can express the subjunctive or several works accentuate different syntactic contexts in which the subjunctive may appear. The problem with this approach is that it forces the student to learn a long casuistry which is never free of exceptions. On the other hand, there have also been very general definitions, which have the advantage of avoiding the memorization of a list of individual cases of appearance of the subjunctive mood, but also have the disadvantage that their level of abstraction is hard to assimilate. In this sense, in section 2, we will try to present a theoretical proposal on the use of the subjunctive which is relatively simple to explain in class. In section 3, they will try to propose some activities and exercises that we believe can consolidate the theory previously explained. Keywords: Subjunctive, logical relationships, mandate, desire, doubt.