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2、Knowledge objectives
1)Students will be able to know the words and phrases.
2) Students will be able to know the sentence: We use water to....
3、Emotional objectives
Students can know the importance of water and try to save water during daily life.
Teaching key points：
1）Learn the new words and expressions
2) make sense of the dialogue。
Teaching difficult points
Grasp the sentence patterns：We use water to ...
Teaching aids：
PPT, book,
Teaching methods：
1）Task based language teaching methods
2) Cooperation.
Procedures：
I. Pre-Task Preparation
Materials
Contents
Purposes
在ppt上呈现谜语
板贴标题
1. Greetings.
2. A riddle about water
3. lead to the titles.
1. Greeting!
Present the riddle on the ppt and ask students to guess.
T: Water is important. Without food, we can’t live in seven days. Without water, we can’t live...
以谜语作为开题，吸引学生的注意力，导出本课主题water.
II. While-task procedure