Raymond Murphy's English Grammar in Use (Intermediate) , particularly the latest Fifth Edition
Access to interactive ebooks with audio (in some versions), which helps with pronunciation and listening skills alongside grammar. Tips for Using the Book Effectively
The genius of Murphy’s book lies in its layout:
English Grammar in Use Book with Answers and Interactive EBook: A Self-study Reference and Practice Book for Intermediate Learners of English
If you’re learning English at a B1–B2 level, you’ve almost certainly heard of Raymond Murphy’s English Grammar in Use. It’s widely considered the gold standard for self-study grammar. The new intermediate edition (often the 5th or 4th edition, depending on the PDF) continues that tradition, and the PDF format adds convenience for digital learners.
What sets Murphy’s work apart from the dense, theory-heavy grammar books of the past is its philosophy: Explanations on the left, exercises on the right.
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