Through the story of the protagonist learning grammar from an English "master", the book explains to readers the core grammatical knowledge in English, especially the subjunctive voice, compound sentences and other common difficulties reported by Chinese English learners. The explanations in the book are in-depth and simple, and the language is vivid and humorous. It not only answers readers' grammatical confusion from specific points, but also helps learners clarify the context of grammar from a macro perspective. It is unconventional and original. In the new edition, the author has made considerable revisions to the content based on his own experience of studying and living in the United States over the past six years, as well as readers' comments and suggestions on the old edition. In addition, the book also has illustrations of the popular painter Fat Rabbit Porridge, which can help readers deepen their understanding and memory.