This is the Ironwood English Department's Advanced English Grammar Problem Collection, compiled by the Ironwood English Department. It is divided into sections by unit, and comprehensively collects problems designed to cultivate the skills needed to tackle English grammar questions. The explanations are detailed, very thorough, and easy to understand. The first 10 sections show some writing, such as check marks and highlighting, but the rest of the book has been hardly used and is almost like new.