COLUMBIA ENGLISH GRAMMAR FOR IELTS is written specifically for students who are preparing to take the IELTS test. It has 35 score-raising lessons covering all the absolutely essential grammar rules, such as subject-verb agreement, dangling modifier, parallel structure, and others which are most often tested on the IELTS. To help you understand better and memorize these key grammar rules more easily, all the lessons are designed to follow the same format with the following outstanding features:1. ERROR EXAMPLES: show you what kinds of mistakes most often made at IELTS and how to correct them;2. GRAMMAR RULES: teach you all the grammar testing points you need to know to help you ace the test;3. PRACTICE TESTS: Use sample Sentence Correction and Sentence Completion questions to help you memorize these grammar rules through repetition;4. ANSWER KEYS: provide answers and explanations to help you avoid the mistakes forever.COLUMBIA ENGLISH GRAMMAR FOR IELTS gives you an English professor's proven method, guaranteed to help you master all the essential grammar rules for the test. If you can spend about 15 minutes a day on each lesson, it will definitely help raise your IELTS score, and, in the mean time, you will become a much better reader and writer.