Understanding and Using English Grammar (5th Ed) Student Book with Essential Online Resources, ISBN 9780134268828 (Blue)
Intensive ESL Grammar 5 Packet
(You may not study every part of every chapter and you may study these in a different order. Level 3 Grammar and Level 4 Grammar also use this book.)
Chapter 9: modals
Chapter 12: noun clauses
Chapter 20: conditionals
Gerunds/Infinitives: from the packet