Below is a draft text summarizing the book's purpose and structure, which you can use for a study guide, course syllabus, or review.

"English Sentence Structure" by Robert Krohn is a practical guide focused on teaching syntax through pattern practice and oral exercises, often used in ESL/EFL programs. The book uses a sequential, drill-based approach—including substitution and transformation exercises—to help learners internalize English sentence patterns.

The PDF provides dozens of substitution drills for each pattern.

Mastering core English syntax through pattern practice and oral drills. Purpose and Methodology Robert Krohn’s English Sentence Structure