约1520字。

　　必修二导学案
　　Unit 4 Wildlife protection
　　Period4 Grammar
　　Learning aims(学习目标): 1. 对现在进行时的被动语态的理解与运用。.
　　Important points(学习重点): 1. 学习现在进行时被动语态的构成
　　2. 使用现在进行时被动语态需要注意的几个问题
　　Difficult points(学习难点): 在具体语境中使用现在进行时的被动。
　　Learning guide(方法引导): 观察例句——总结规律——运用规律
　　Self-study and exploration(自学探究):
　　StepⅠ: 观察思考
　　Read the following sentences and explain the usage of the Present Progressive Passive Voice in each sentence to your partner. (方法指导：先翻译句子，再指出现在进行时被动语态的用法)
　　1. We are being killed for the wool beneath our stomachs.
　　2. Our fur is being used to make sweaters for people li.
　　3. I’m sorry I didn’t know that I wonder what is being done to help you.
　　4. Daisy turned around and found that she was being watched by an elephant.
　　5. So good things are being done here to save local wildlife.
　　StepⅡ：归纳规则
　　Study the explanation of the grammar and then do the exercises that follow.(方法指导：通过观察上面的例句，我们可将现在进行时被动语态构成和用法归纳如下，请仔细学习一下)
　　1. 意义：
　　主语和谓语动词之间是被动关系,而且动作正在进行。
　　2. 现在进行时被动语态构成
　　(1) 肯定形式：  主语+am/is/are＋being＋过去分词
　　The house is being painted. 房子正在被粉刷。
　　(2) 否定形式:   主语+am/is/are＋not＋being＋过去分词
　　The trees are not being watered.
　　(3) 疑问形式:  Am/Is/Are＋主语＋being＋过去分词？
　　Am I being watched over?
　　(4) 特殊疑问句的形式: 把特殊疑问词放在一般疑问句前面。
　　How many bridges are being built in the village?