The sentence is seen as a unit of discourse that is used to convey a content.. The sentence, regardless of its compositional structure, can be studied from a logical-grammatical, structural, semantic, thematic point of view, and modalities. The contextual value of each of the constituents of the complex context unit is a statement of the general meaning of the communication. The least significant and denominative unit is the word. The communicative unity is the sentence, is a drama or participates actants, circumstance, close ambiguity to remove we need tick, it is the object of pragmatics.The term superior does not only mean that the unit is composed of several propositions (confronting Proust); It means that the complex contextual unit is built on relationships beyond those of juxtaposition, coordination. It will be said therefore that the complex contextual unit is composed of constituents connected by differential relations: grammatical, semantic, communicative.