For the 3rd Year Students
REVISION

1. Longman Advanced Learners' Grammar: Unit 8, pp. 104-111;
2. OPG_Advanced: Unit 5, p. 59;
3. Essential Grammar in Use_ Advenced by Martin Hewings: Units: 21-25;
4. A Guide to Better Grammar by T.A. Barabash: pp. 235-237