内容正文:
Unit 5 We Have Only One Earth
Period 6 learning plan
Learning objectives:
By the end of this lesson, you will be able to:
1. Understand and use the present continuous tense to describe ongoing environmental actions.
2. Understand and use the passive voice to describe environmental processes and changes.
3. Apply both grammar structures in writing and speaking about environmental protection.
【课前预习案】
I. 回顾与思考
1. 现在进行时(Present Continuous)的结构是什么?请写出肯定句、否定句和疑问句的示例:
肯定句:__________________________________________
否定句:__________________________________________
疑问句:__________________________________________
2. 被动语态(Passive Voice)的基本结构是什么?请写出示例:
结构:_______ + _______
示例:__________________________________________
3. 在环保话题中,什么情况下适合用现在进行时?什么情况下适合用被动语态?
______________________________________________________________________________________________________________________
II. 试试身手
用正确的时态和语态完成句子:
1. Look! The students _______ (plant) trees in the park now.
2. Plastic bottles _______ (recycle) into new products in this factory.
3. The air quality in our city _______ (improve) because of new policies.
4. Waste paper _______ (collect) every Monday by volunteers.
【课中学习案】
Step 1: Grammar discovery
1. 阅读课文中的句子,找出含有现在进行时和被动语态的句子。
2. 小组讨论:这些句子分别表达了什么含义?时态和语态起到了什么作用?
Step 2: Present continuous tense practice
1. 观察环保活动图片,用现在进行时描述图中正在发生的事情。
Example: They are sorting rubbish.
2. 情景对话:两人一组,模拟正在进行的环保活动对话。
A: What are you doing?
B: I'm turning off the lights to save energy.
Step 3: Passive voice practice
1. 分析被动语态在环保文本中的使用。
Example: Waste is sorted into four categories.
2. 将主动语态句子改为被动语态:
- People plant trees every spring. → Trees _______ every spring.
- The government is improving air quality. → Air quality _______ by the government.
- Scientists are developing new recycling technologies. → New recycling technologies _______ by scientists.
Step 4: Integrated practice
1. 小组任务:设计一个环保宣传海报,至少包含:
- 2个现在进行时的句子(描述正在进行的环保行动)
- 2个被动语态的句子(描述环保措施或成果)
2. 写作练习:以"My School's Green Actions"为题,写一段话(5-6句),正确运用两种语法结构。
Step 5: Peer review and presentation
1. 交换写作成果,互相检查语法使用的准确性。
2. 小组选出最佳作品进行展示,并解释语法使用的理由。
【课后巩固案】
I. 基础达标
1. 整理现在进行时和被动语态的规则表格(结构、用法、示例)。
2. 完成课本中的相关语法练习。
II. 能力提升
1. 观察你所在社区的环保活动,用现在进行时记录至少3个正在进行的行动。
2. 查找一个环保成功案例(如塞罕坝),用被动语态写出3个关键措施或成果。
III. 拓展思考
为什么在环保宣传和报告中经常使用被动语态?这种语言选择有什么优势?在什么情况下使用现在进行时更能打动人?
答案:
【课前预习案】
I.
1. 肯定句:主语 + am/is/are + V-ing(例:She is recycling paper.)
否定句:主语 + am/is/are + not + V-ing(例:They are not wasting water.)
疑问句:Am/Is/Are + 主语 + V-ing?(例:Are you turning off the lights?)
2. 结构:be + 过去分词(例:Plastic is recycled.)
示例:Trees are planted every year.
3. 现在进行时:描述正在发生的环保行动、当前的环境变化。
被动语态:强调环保措施、政策实施、环境被改善的过程。
II.
1. are planting
2. are recycled
3. is being improved / is improving (两者皆可,被动强调"被改善",主动也可接受)
4. is collected
【课中学习案】
Step 3:
- Trees are planted every spring.
- Air quality is being improved by the government.
- New recycling technologies are being developed by scientists.
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