... Schrampfer Understanding andusingEnglishgrammar / Betty Schrampfer Azar- - 3rd ed.p. cm.Includes index.ISBNO-13-958661-X1. English language—Textbooks for foreign speakers. 2. English language Grammar Problems, ... acknowledgment of the contributing writers for the Understanding andUsingEnglishGrammar Workbook, Second Edition: Rachel Spack Koch,Susan Jamieson, Barbara Andrews, and Jeanie Francis. Some of the exercise ... tree.Rita stood under a tree when it began to rain.Present and Past, Simple and Progressive 27 UNDERSTANDING AND USING ENGLISH GRAMMAR Third Edition AcknowledgmentsThe second edition of...