RESEARCH IN THREE AREAS OF COMPUTATIONAL LINGUISTICS IS DESCRIBED--(1) THE DESIGN AND DEVELOPMENT OF A TRANSFORMATIONAL GRAMMAR FOR A SUBSET TO GRAMMATICAL SENTENCES IN ENGLISH, (2) THE IMPLEMENTATION OF THIS GRAMMAR IN TERMS OF A SENTENCE SYNTHESIZING PROGRAM WRITTEN IN LISP 1.5, AND (3) THE USE OF SENTENCE SYNTHESIZING PROGRAMS FOR TRANSFORMATIONAL GRAMMARS GENERALLY. THE PRIMARY OBJECTIVES HAVE BEEN TO SPECIFY A DESCRIPTIVELY ADEQUATE TRANSFORMATIONAL GRAMMAR FOR ENGLISH, INCORPORATING RECENT THEORETICAL DISCOVERIES, AND TO DEVELOP COMPUTATIONAL PROCEDURES FOR TESTING THE DESCRIPTIVE ADEQUACY OF TRANSFORMATIONAL GRAMMARS OF ADVANCED DESIGN. AN ANALYSIS IS GIVEN OF THE RESULTS OBTAINED, AND METHODOLOGICAL LIMITATIONS ARE DISCUSSED. THE SENTENCE SYNTHESIZING PROGRAM HAS BEEN FOUND VALUABLE IN REVEALING ERRORS IN THE TRANSFORMATIONAL RULES. (KL)