导学案Unit4Lesson4VirtualTourism

1、课 题The environment (speaking & writing )教学目 标1.Improve the students speaking ability by describing different pictures.2.Help the students improve their writing ability by combining sentences.重 点难 点1.How to help students describe the pictures bravely.2.How to help students combine the sentences t

2、ogether.Before you startLook up these words and phrases in your dictionary.1. smog_ 2. environmental awareness _3. be blanketed/covered with_4. air quality_5. classify_ 6. smoggy_7. mask _ 8.domestic_9.power plant_ 10.harmful_11.purify_ 12.coal burning_Teaching processStep I lead inUse one sentence

3、to describe your head teacher.1.He is _.(appearance/age/character/temper) 2.He is _except for_.3. Although/Though he is _, _.4. _as he is , he is _.Step II Speaking A. Air pollutionPicture 1 What can you see in the picture?1. The sky is_. (不再像以前一样蓝了。) 2. The city is _. (被厚重的雾霾所笼罩。)Picture 2 Where do

4、es the smog come from?1.工厂将大量的烟雾排放到大气中。（pourinto ）_2.私家车的数量不断增加，这就意味着越来越多的有害气体被释放到空气中。（定语从句）_3.此外,家庭和发电站燃煤也加剧了大气的污染.add to _Picture 3 How does smog affect our life?1. Owing to_.(由于雾霾，人们出门时不得不戴上口罩。)2.频繁出现的雾霾天气对我们的日常生活造成了极大的影响。（have an impact /influence on）_3.雾霾天气带来了越来越多的交通拥挤，也带来了各种各样的疾病。（as well as）_

5、Picture 4 How can we reduce smog? 1.我们上班可以骑自行车或乘坐公共交通工具而不是私家车。（instead of）_2.工厂的有害气体在排放到空气中之前应该被净化。(purify)_3.（政府）应该制定更多的法令来保护环境。（被动语态）_B.water pollutionPicture 1 What happened in the picture?1.河流和湖泊被严重污染，这导致很多的动物死掉。（被动语态&定语从句&lead to）_2.河里的水不再像以前一样清洁了。_Picture 2 Who should be to blame for i

6、t? 1.不仅仅是化工厂，我们所有的人都应该对水污染负有责任.（not only but also & be responsible for/be to blame for） _Picture 3What effects will it bring to us?1.如果我们不控制水污染，越来越多的人将会生病甚至死亡。_2.只有立即采取行动，我们才能挽救地球和我们自己。（only by置于句首,主句部分倒装）_Picture 4What should we do to prevent water from being polluted?1.化工厂应该确保污水在排放到河流中之前得到净化。（waste /polluted water; pufify）_2.我们每一个人都应该做我们能做的来保护环境：例如，分类投放垃圾。（do everything/whatever one can to do ；classify）_3.我们所有的人都在保护环境方面起着重要的作用_Step III Group work Air/water pollution_Step IV show time Present the composition to others.Step V Homework Apart