This is a classic and widely respected reference book for learners and teachers of English. It’s especially useful for understanding tricky points of English grammar, vocabulary, and usage.

🧠 Key Features:
- Explains over 600 points of English grammar and usage clearly.
- Focuses on real problems learners face, especially confusing structures or words.
- Ideal for intermediate to advanced learners and teachers.
- Divided into two parts:
- Part A: Grammar
- Part B: Vocabulary, idioms, style, pronunciation, and more
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