Some aspects of a theory of grammar are presented which derive from a formal theory of language acquisition. One aspect of the theory is a universal constraint on analyzability known as the Freezing Principle, which supplants a variety of constraints proposed in the literature. A second aspect of the theory is the Invariance Principle, a…

Two traditions are distinguishable in modern linguistic theory: the tradition of "universal grammar" which flourished in the 17th and 18th centuries, and the tradition of structural or descriptive linguistics which reached its peak 15 or 20 years ago. Universal grammar was concerned with (1) the relation of deep structure to surface forms and to…

This article reviews the historical development of applied linguistics in foreign language instruction. Five major principles influencing early applied linguistic theory are summarized, emphasizing the oral nature of language. Central to the article are discussions of: (1) prescriptive or normative grammar, (2) transformational grammar, (3)…