第四课时Section B (3a-Self Check)【语言知识目标】 1.复习A、B两部分重点单词的用法。2.复习构词法。 【情感与态度】保护环境,人人有责。【策略与意识】合作学习,培养学生运用英语的能力。【教学重点】1.学会利用所学句型表达怎样保护环境。2.总结本单元所学到的重点词组及句型。【教学难点】写作Step 1Warming up1.Check homework2.Review the important words and expressions .(温故知新)动词:litter,cost,afford,recycle 名词:bottom,fisherman,coal,advantage,industry,law,gate,bottle,president,work,metal,creativity形容词:ugly,wooden,cruel,harmful,scientific重点短语:be harmful to,the food chain,at the top of,take part in,turn off,pay for,take action,throw away,put sth.to good use,pull.down,bring back3.Word formation(Self Check1)写出下列单词的适当形式(熟悉构词法,做到触类旁通)pollute (名词)fame (形容词)different (名词)slow (副词)act (名词)wood (形容词)important (名词)sudden (副词)protect (名词)science (形容词)inspire (名词)health (形容词)wide (副词)build (名词)south (形容词)create (名词)care (形容词)real (副词)Answers:pollution,famous,difference,slowly,action,wooden,importance,suddenly,protection,scientific,inspiration,healthy,widely,building,southern,creativity,careful,reallyStep 2Grammar (Self Check 2)Match each statement with the grammar structure.StatementGrammar1.The river used to be so clean.a.Present progressive2.We have seen many changes in the environment.b.Modal verbs3.People should take public transportation more.c.Passive voice4.The river is polluted by factories.d.used to5.The air pollution is getting worse and worse.e.Present perfectAnswers:1.d2.e3.b4.c5.aStep 3DiscussionDiscuss ways to cut down on these kinds of pollution in groups.(为学生提供使用语言的语境,培养学生语言运用能力)Kinds of pollutionWays to cut downwater pollutionPeople should not throw litter into the river.land pollutionWe should not throw rubbish away at random (随便). noise pollutionWe should cut down on using the mobile phones.air pollutionWe should take the bus or subway instead of driving.Step 4Writing1.Think about the environment in your town or city.Which parts of the town or city have a nice environment and why? Which parts may be less nice and need to be improved? Why? Discuss them in groups and complete the chart.Good environmentWhyBad environmentWhy2.Write a letter to the city mayor about the problems and your suggestions.In your letter, describe the environmental problems in your town or city.What are the problems? Where are they? What or who is causing these problems? Also, give suggestions or possible ways to solve the problems.I think that.We should/could.I suggest.Give the students some help if possible.Ask some individuals to read their writings.(为学生提供使用语言的语境,培养学生综合语言运用能力)Step 5SummaryHave the students give a summary.(总结本节课的学习内容,让学生对本节课的学习内容有一个清晰的概念,也便于学生课下复习。)Homework1.Review the useful language items.(及时复习巩固,养成良好的学习习惯。)2.Preview the new words in Unit 14.(能够根据音标读出单词并了解汉语意思,使学生养成自主学习的习惯。)Important words and expressions动词:litter,cost,afford,recycle 名词:bottom,fisherman,coal,advantage,industry,law,gate,bottle,president,work,metal,creativity形容词:ugly,wooden,cruel,harmful,scientific 重点短语:be harmful to,the food chain,at the top of,take part in,turn off,pay for,take action,throw away,put sth.to good use,pull.down,bring back一、单项选择1.How much is the ticket to Central Park?A one-way ticket $40, and you can another $20 for a round-trip.A.costs;payB.cost;spendC.pay;spendD.spends;pay2.Please the lights when you leave the classroom.A.turn onB.turn offC.turn upD.turn down3.Were supposed to recycle paper and bottles.It can help the environment.It can save money, too.A.Its nothingB.Best wishesC.I agreeD.I disagree4.At present, one of the best ways to study is working in groups.More chances to students to learn from each other.A.offerB.are offeredC.have offeredD.are offering 5.You drive your car so fast.Its very dangerous.A.wouldntB.shouldntC.couldntD.mightntAnswers:1.A2.B3.C4.B5.B二、用所给单词的适当形式填空1.Many people havent known the (important) of protecting environment.2.English is (wide) used in the world.3.Nothing is waste if you have a (create) mind.4.If we drive less and plant more trees, there will be less (pollute).5.He would like to find a job in a (south) city.Answers:1.importance2.widely3.creative4.pollution5.southern