This book is an extension to my books- ‘English Grammar’ and ‘A New English Grammar for the Beginners’. It deals with the predicate theory. The existing knowledge is not enough to remove the ambiguities in English grammar. ‘The Predicate Theory’ is to recuse the children from the anomalous and wrong English grammar. Therefore, I introduced some new words, and definitions hitherto unknown to English grammar. This book gives reasonable answers to 99 percent of the unanswered questions. It will do immense benefit to the teachers and students of all classes all over the world.