英语人教版九年级全册Unit13 SectionA 1a——1c.doc

Unit 13 Were trying to save the earth!Section A(1a-1c)一、教学目标：1. 语言知识目标基本词汇：litter, advantage, bottom, fisherman, coal基本词组：be harmful to, at the top(of sth.), take part in, o, put .into , clean up, play a part in .基本句型：Were trying to save the earth! The river used to be so clean. The air is badly polluted.2. 技能目标: 能正确运用现在进行时，现在完成时，被动语态，情态动词和used to 句型来描述环境污染和环境保护。3. 情感目标: 有环境危机意识，学会关注环境保护环境。二、教学重难点： 1. 教学重点：（1）能正确运用现在进行时，现在完成时，被动语态，情态动词和used to 句型。 （2）描述环境污染和环境保护的常用方法。2. 教学难点：能正确运用现在进行时，现在完成时，被动语态，情态动词和used to 句型。三、教学准备 教师准备本课时教材中所涉及的污染和环境保护的图片或教学幻灯片；涉及课后巩固练习的幻灯片、多媒体。四、教学步骤Section A 1 (1a-1c)I. PresentationShow the picture of the earth and tell students the earth is polluted now. For example: (1) The factories that burn coal pollute the air with a lot of black smoke.(2) Factories put waste into the river.(3) People should throw away litter in the bin. (4)There are more cars on the road.（设计意图： 通过各种污染的图片及功能句式的呈现，使学生对本单元的话题有个整体的感知，为接下来进一步的学习做铺垫）II. Learning（1a） Brain storm activityT：(1) show some pitctures of the new words and teach students to read and understand them.(2) Brain storm activityDivide Students into 3 groups and each group must speak out words related to pollution as much as they can . Then, put them into different pollution groups . Then , teachers will put the words on the blackboard, and list the causes of each pollution. At last , the winner will be decided by speaking out the most words .S: Here are some words related to different kinds of pollution. Write them in the box below. Then add more words.loud music cars rubbish planes littering ships factories smoking building houses mobile phonesnoise pollution air pollution water pollution _ _ _ _ _ _ _ _ _Keys: noise pollution loud music planes mobile phones building housesair pollution factories smoking cars building houseswater pollution ships rubbish littering factories(设计意图：通过头脑风暴及竞赛活动充发挥学生的主动性， 同时，能培养学生的团结协作能力。另外，对污染方面的词汇的积累。为接下来的听力教学做铺垫。)III. Listening（1b）1. Go over the passive voiceT: show some pictures and talk about them: eg. The air is polluted by dirty water.让学生分析该句的语言结构，复习被动语态的基本构成，并根据图片用被动语态造更多的句子。 教师继续讨论图片，让学生填表： What was the problem? What caused the problem?How should the problem be solved?2. 教师引导学生理解1b的要求，教师开始播放录音。第一遍学生只听录音，理解大意，不做练习；第二遍学生边听录音边填空完成句子；第三遍教室再次播放录音，学生四人一小组互相核对答案，有不一致的答案向全班学生提问，全班学生共同解答。（设计意图：在情境中呈现和使用被动语态，描述污染和环境保护。）1. 1b Listen and complete the sentences.What was the problem?The river was _. Even the bottom (底部) of the river was full of _. There were no more _ for fishermen (渔民) to catch.What caused the problem?People are throwing _ into the river. Factories are putting _ into the river.How should the problem be solved?We should write to the _ and ask them to _ the factories. Everyone should help to _ the river.Keys: really dirty rubbish fish litter waste governmentclose down clean up2. Listen again and check () the sentences you hear.1) We could go fishing in the river.2) The river was really dirty.3) The river has always been the nicest river in this town.4) We should ask the teachers for help.Keys: 2 3 IV. Practice （1c)1. 教师引导学生理解1c的要求，找两个学生朗读1c的对话。2. 学生两人一组分角色朗读1c的对话。1. Role-play the conversation in 1c.Mark: The river was dirty. Even the bottom of the river was full of rubbish.Tony: But it used to be so clean!Mark: Yes, but people are throwing litter into the river.Tony: Everyone in this town should play a part in cleaning it up!2. Make conversations using the pollution in 1a.A: The river has always been the nicest river in this town.B: Yes, it used to be so clean.A: But I was there last weekend and the river was really dirty.B: What caused the problem?A: People are throwing litter into the river.B: What should we do?A: Factories are also putting waste into the river.B: Yes, everyone in this town should play a part.A: We should write to the government and ask them to close down the factories.B: What else can we do?A: Everyone should help to clean up the river.（设计意图：通过情景呈现并借助描述污染和环境保护等操练被动语态）V. Language points1. Were trying to save the earth! 我们正在竭尽全力拯救地球! try to do =try ones best to do 努力去做某事。 e.g. Every student should try to study hard in order to study in a university. 为了进入大学学习，每个学生都应该努力学习。2. Here are some words related to different kinds of pollution. be related to 与有关 e.g.I am notrelatedtohim in any way. 我和他无任何关系。 3. Everyone in this town should play a part in cleaning it up! play a part in 在方面起作用 e.g. A good diet plays a large part in helping people live longer. 健康的饮食在帮助人们长寿方面起着非常大的作用。play a part 在中扮演角色 e.g. He was invited to play a part in this TV play. 他被邀请参加这个电视剧的演出。4. Even the bottom of the river was full of rubbish. Yes, but people are throwing litter into the river.litter 和 rubbish 都可指“垃圾”，用作不可数名词。rubbish 指“没用的东西(被扔或将要丢弃的无用的东西)”不可回收。litter 指“(室内或公共场所)乱扔的废物(纸屑、不要的包装纸、废瓶等)”还可回收e.g. Throw the rubbish out. 把垃圾扔出去。 The room is full of rubbish. 房间里堆满了垃圾。 Pick up your litter after a picnic. 野餐后将废弃物收拾好。 XI. Exercises用动词的适当形式填空。1) Were trying _ (save) the earth.2) There used to_ (be) clean and beautiful.3) There are too many _ for _to catch (fish).4) Its bad for en