Many versions include audio for the exercises, allowing you to check your work and practice active listening . How to Get the Most Out of Your Audio
The "4th Audio" specifically refers to the supplementary audio recordings that accompany this edition. Instead, it is a collection of audio tracks—typically available via a downloadable app (Cambridge Bookshelf) or CDs—that contain: Basic Grammar In Use 4th Audio
| Grammar Point | Audio Example (Listen closely) | Meaning Change | | :--- | :--- | :--- | | | "I like" vs. "He likes" | Subject change | | Past -ed | "I walk" (present) vs. "I walked" (past) | Time change | | Contractions | "He is" vs. "He's" | Formal vs. casual | | Modal verbs | "I can swim" vs. "I can't swim" | Positive vs. negative | Many versions include audio for the exercises, allowing