Functionalism, as characterized by Allen, (2007:254) "holds that linguistic structures can only be understood and explained with reference to the semantic and communicative functions of language, whose primary function is to be a vehicle for social interaction among human beings." Since the 1970s, inspired by the work of Jespersen, Bolinger, Dik, Halliday, and Chafe, functionalism has been attached to a variety of movements and models making major contributions to linguistic theory and to various subfields within linguistics, such as syntax, discourse, language acquisition, cognitive...