: Targeted at elementary points that may still cause problems.

: Modal verbs, passives, infinitives, and -ing forms.

: Units are often split into two difficulty levels:

The is a comprehensive grammar practice book designed by award-winning authors Michael Swan and Catherine Walter . Published by Oxford University Press , it is intended for intermediate students who want to improve their grammatical accuracy and fluency through clear explanations and practical exercises. Core Content & Structure

: Focuses on more advanced intermediate grammar points. Key Features