The series is traditionally divided into three distinct levels, often identified by the colour of their covers: Book Title Common Name CEFR Level Target Audience " The Red Book " Absolute beginners and low-level learners. Fundamentals of English Grammar " The Black Book " Lower-intermediate and intermediate learners. Understanding and Using English Grammar " The Blue Book " Upper-intermediate to advanced students. What’s Inside Basic English Grammar (Red Book)?
"Thank you," he whispered to the spine. He had a feeling he was going to need her help again. basic english grammar betty azar pdf