deep structure

In linguistics, "deep structure" refers to the underlying semantic content of a sentence, representing its core meaning. This concept is central to transformational grammar, a theory developed by Noam Chomsky. Transformational grammar posits that sentences have both a deep structure and a surface structure. Transformations are rules that convert the deep structure into the surface structure, which is the form of the sentence as it is spoken or written. The deep structure is where semantic interpretation primarily occurs, while the surface structure is related to phonetic interpretation. This framework aims to explain the relationships between different sentences, such as active and passive voice, or statements and questions, by showing how they derive from a common underlying structure.12345