This document provides instruction on English grammar structures, including:
1. Echo questions which are used to show interest and surprise by repeating the subject and auxiliary verb of a statement as a question.
2. Agreeing and disagreeing with statements using phrases like "So do I" and "Neither do I".
3. Using the passive voice where the subject receives the action rather than performs it, formed with "be" + past participle.
4. Different uses of "will" including offers, promises, predictions and unplanned decisions.
5. Using "must" and "mustn't" to express strong obligation or advice.