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