Conrad Susan, Biber Douglas. Real Grammar: A Corpus-Based Approach to English. Answer key

Pearson Education, 2009. —— 64 p.An innovative corpus-based grammar text, Real Grammar uses the latest corpus research to show how 50 grammatical structures and expressions are used in speech and writing. This focus on authentic usage motivates students to move past traditional grammar texts and use English more like native speakers. Real Grammar is an essential tool for students to study English as it is used in the real world of conversation, fiction, newspaper, and academic writing. Fifty independent units provide total flexibility, allowing the text to fit any curriculum Rich activities, varying from exercises to discovery and analysis, help learners understand and use the target grammar.