Many learners use the Listen and Repeat method to build muscle memory in their speech.
Detailed coverage of tenses (Present Continuous, Past Simple), modals, and basic sentence structures. Basic Grammar In Use 4th Audio
There are several ways to get your hands on the audio files, depending on your version of the book: Many learners use the Listen and Repeat method
You can find sample audio units online to preview the American accent used throughout the series. Tips for Success Basic Grammar In Use 4th Audio