仁爱版九年级英语上册课件Unit2Topic3SectionC

1、Unit 2 Saving the EarthTopic 3What can we do at home to protect the environment? Section C 课件 11.Go on learningtheusage of compound sentenceswith conjunctions.2.Know about themoderntechnologies onenvironmentalprotection.Techingaimsand demands连词 and, but , or和 while的用法 1、表示并列关系，常用连接词and,notonlybutals

2、o等2表示转折，常用连词有but（但是,表示转折）,while（“而, 然而 ”强调对比）等3表示选择关系，常用连词有or,eitheror等。4、表示因果关系，常用连词有so,for等Fill in the blanks using but, and, though and while.1. The doctors tried their best to save the patients life, _ failed 2. Kangkang can solve the problem, _ I cant.3. We bought her a birthday present, _ she

3、liked it very much. 4. Hurry up_ youll be late. while and but orcoalDiscusstheenergyresources youhaveknownwindsunnuclearwaterLook at the pictures.Do you know what they are?electic vehiclemaglev train biogasNew words1. power: 能力，力，力量，电力，功率 the power of speech 语言能力 the power of vision 视力 producepowerf

4、rom从获得能量2. cause n、原因，起因，动机 cause and effect 因果 vt、引起，使发生 eg: What caused the accident?3. acid rain 酸雨 acid adj:酸的，酸性的 4. nuclearenergy核能 nuclear adj.核心的，核的，核能的 nuclear family 核心家庭，小家庭 nuclear-powered 核动力的5. biogas technology 沼气技术6. animal waste 动物粪便7. renewablb energy 可再生能源8. be used in 被用在被动语态结构：b

5、e+动词的过去分词9. key 主要的10. electric vehicles 电动车11. German-built 德国制造12. a top speed 最高速13. energy-efficient 节能Read 1a and answer the following questions.Why isnt coal a good material?What is the disadvantage of using nuclear power?What do you think of electric cars?What do you think of the maglev train

6、?It is very dirty and causes acid rain. Nuclear power can be very dangerous. It is quiet and quick.They are very efficient and cost very little to run. Work aloneRead 1a again and fill out the following table.Way to produce powerAdvantageDisadvantagebiogaselectric vehiclemaglev trainrenewable effici

7、ent,cheap, no pollution quiet, quick,energy-efficient, no pollution It will cause an increase in electricity needs. much more expensive than traditional trains. 重点及难点 连词 or, and, but 和 while的用法 1、表示并列关系，常用连接词and,notonlybutalso等2表示转折，常用连词有but（但是,表示转折）,while（“而, 然而 ”强调对比）等3表示选择关系，常用连词有or,eitheror等。4、表

8、示因果关系，常用连词有so,for等重点 重点及难点 重点及难点1、 nuclear-powered 核动力的5、biogas technology 沼气技术6、animal waste 动物粪便7、renewablb energy 可再生能源10、electric vehicles 电动车12、a top speed 最高速13、energy-efficient 节能Useful expressions 1.Inmanycountries,peopleproducepowerfromcoal,butitisverydirtyandcausesacidrain.2.Althoughelectricvehiclesproducenopollution,the