Knowledge and skills
1．To get students to master all the useful new words and expressions in this unit.
2．To have students understand the new grammar item “Subjunctive Mood(2)” better，and enable them to use the following structure correctly：If I had done...I would have done...
3．To develop the students' ability to use the important language points in this unit.
Process and methods
Design some additional exercises for students to do in order that they can learn to use and grasp all the contents.
