Completar Frases Formalism by Noam ChomskyVersión en línea complete the sentences por Daniel Rocha Corona 1 Noam of Chomsky framework grammar idea formulating mathematically a grammar generative 1 . A context - free grammar provides a simple and precise mechanism for describing the methods by which phrases in some natural language are built from smaller blocks , capturing the " block structure " of sentences in a natural way . 2 . The linguistic formalism derived from . 3 . In Chomsky's , the syntax of natural language was described by a context - free rules combined with transformations rules . 4 . The consisting of explicit rewrite rules was abandoned .