Just as athletes repeat movements to perfect form, language learners need to repeat sentence patterns until they feel natural. Drilling transforms conscious knowledge ("I know the rule") into subconscious fluency ("It just sounds right").

A Practical English Grammar: Structure Drills 1 by A.J. Thomson and A.V. Martinet, published by Oxford University Press, is a key resource designed to reinforce grammatical accuracy for intermediate learners through intensive, repetitive practice. The text focuses on developing active control over language structures, including auxiliary verbs and conversation-based exercises. Detailed information on the exercises can be found at Oxford University Press A Practical English Grammar - Structure Drills 2

The "1" in the title signifies . This is the sweet spot for most learners. It covers:

: Practice for both negative and affirmative statements.