Understanding and using English grammar - Azar, Betty Schrampfer, 1941- (Englewood Cliffs, N.J. : Prentice Hall Regents, 1989)
Verb tenses. -- Modal auxiliaries and similar expressions. -- The passive. -- Gerunds and infinitives. -- Singular and plural. -- Adjective clauses. -- Noun clauses. -- Showing relationships between ideas - part 1. -- Showing relationships between ideas -part 2. -- Conditional sentences.
Keywords: INGLES -- LIBROS DE TEXTO PARA EXTRANJEROS; INGLES -- GRAMATICA -- PROBLEMAS, EJERCICIOS, ETC