3. 用于强调结构
4. 用作人称代词。
5. 用作非人称代词。
6. 用于某些习语
7. It的一些习惯用法Exercises
II Proverbs with it
III Exercises
IV Homework
1.Revise and master the use of it.
2. Pre-view the Reading: HIV/AIDS: Are you at risk?
Using language Reading
I Show some pictures on the computer. This step is to make the students have a general understanding of AIDS and HIV.
II Groupwork
Task 1: How much do you know about HIV/ AIDS? （True or False?） Task2：Read the poster on P22 and then choose the answers to the questions:
III Discussion
How should we act towards people who have HIV/ AIDS? What can we do to help them?
IV Homework
Find more information about HIV/AIDS, and tell me how would you behavor in the future, if you met a person with HIV/AIDS? Using language
Listening speaking and writing
Listening