The intermediate level (B1-B2 on the CEFR scale) is often where students get stuck. You know the basics, but you struggle with nuance. Murphy’s tackles these "sticky" areas:
Amazon sells the Kindle version of the 5th edition. It is not a true PDF (text reflows), but it includes all content and the study guide. Price: ~$32. raymond murphy english grammar in use intermediatepdf new
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