【最新】人教版九年级英语下册Unit 13 We’re trying to save the earth! Section B (1a—1e)优质课课件

Unit 13 We’re trying to save the earth!要点详解1. We’re trying to save the earth!我们正尽力拯救地球！(1) 本句时态为现在进行时，表示现阶段正在做的事情。

现在进行时所表示的动作并不一定在说话人的说话时刻进行，而是在包括说话时刻在内的一段时间当中进行。

例如：George is translating a book now. 乔治现在在翻译一本书。

（说这句话时，乔治不一定正在翻译；但在包括“说话时刻”在内的一段时间当中，乔治是在从事翻译工作。

）(2) try to do 表示“设法或尽力去做某事”，实际上做与不做，视情况而定，而try doing表示“试着做”，即动作真的进行了或正在进行，成败则视结果而定。

例如：He tried to read, but he was too tired to read much.他想设法看书，但太疲倦了，没看多少。

He tried reading, but that could not make him forget his trouble.他试着看书，但这并没使他忘记烦恼。

2. I am like this animal because I am strong and intelligent.我像这种动物，因为我强壮而聪明。

(1) like在本句中做介词，意为“像”，例如：He looks like winning the race.他看来要在比赛中获胜。

She is like her mother.她像她的妈妈。

(2) like做介词时可用very，very much，rather，quite等副词修饰。

例如：You look very much like your father.你与你父亲很相像。

3. Some of the swamps have become polluted。

一些沼泽已被污染了。

Unit 13We're trying to save the earth!本单元围绕环境保护的话题，并用主题图片表现噪音污染、空气污染、水污染等内容，目的是为了让学生对环境的破坏有一个直观的认识，从而激发学生强烈的社会责任感和对未来发展的思考。

Section A的重点是让学生掌握与环境污染和环境保护相关的词汇和句型，同时引导学生关爱动物、保护环境。

教学难点是让学生学会正确使用连词和结合生活实际讲述如何保护环境。

Section B在Section A所学的基础上，进一步谈论如何保护环境。

教学重点是让学生了解环境保护的方式，并落实到积极的行动当中，同时还有阅读策略和写作技巧的训练。

教学难点是让学生在阅读2a文章之后，根据所给词根找出衍生出的不同词汇，并理解前缀和后缀的不同用法。

The First Period—Section A(1a－2d)Teaching Important Points【教学重点】Key words & phrases：litter，bottom，fisherman，coal，ugly，advantage，cost，wooden，plasticnoise pollution，air pollution，water pollution，be full of，play a part in，turn…into，cut down air pollutionKey sentences：1.Even the bottom of the river was full of rubbish.2.It used to be so clean.3.Everyone in this town should play a part in cleaning it up.4.The air is badly polluted because there are more cars on the road these days.5.The air has become really polluted around here.6.We're trying to save the earth.Key structure：should＋do；used to＋do；have/has＋done；be＋done；be＋doinge．g.Everyone should help to clean up the river.The air has become really polluted.I used to be able to see stars in the sky.The air is badly polluted.Teaching Difficult Points【教学难点】★Practice the structures to talk about pollution and environmental protection.Teaching Aids【教学工具】A tape recorder，CAI or multimedia courseware.Teaching Steps【教学过程】★Step 1Leading in【新课导入】1．Greeting2．Discussion and reviewDiscuss with the students，like this：T：What kinds of pollution are there these days?S：…T：What causes the pollution?S：…3．Review the words and expressions about the topic.★Step 2Cooperative inquiry【合作探究】1．Finish the task in 1a①Show pictures or play videos about pollution and talk about the pollution.②Read these phrases in 1a.Look at the pictures in 1a and say what they see in the pictures.Write down the words and add more words.③Ask students to say out their words in each kind of pollution.2．Finish the task in 1b①Read the instructions.Get the students to read the contents in the chart and think of what they will fill in the blanks.②Play the recording for the first time.Students listen and fill in the words.③Play the recording a second time.Ask them to check the answers.Then ask the questions.Students answer with full sentences.④Ask more questions to help students learn more details.Then play the recording for the students to role－pay the conversation.3．Finish the task in 1c①Show the key words of the conversation.Ask students to retell the contents in the chart.Like this：What：dirty；bottom，rubbish；fishWhy：littering，putting wasteHow：write to，close down；help to clean up②Read aloud the model dialogue in 1c.Then in pairs，do the oral practice with more words.③Ask two pairs to perform in class.4．Finish the tasks in 2a－2b①Use PPT or pictures to show the four kinds of pollution.Get the groups of students to havea competition to say words about the pollution one by one.land pollution：…air pollution：…noise pollution：…water pollution：…②Get the students to write down these words in their notebooks.③Play the recording for the first time.Students listen and circle the kinds of pollution.Check answers with the class.④Read the sentences in 2b.Predict the contents they will fill in.Play the recording.Students listen and complete the sentences.⑤Play the recording again.Check the answers with the whole class.5．Finish the task in 2c①Read the sample conversation in 2c.Then Read the listening materials and discuss in pairs what causes the two kinds of pollution.②Students work in pairs，making dialogues.③Ask three pairs to role－play their conversations to the class.6．Finish the task in 2d①Talk about the picture in 2d.Ask：What are your ideas for solving the air pollution/waste pollution problem？Present the new words in the conversation.Such as，coal，advantage，wooden，plastic，takeaway，bin，…②Read the conversation in 2d quickly.Find out the problems about environmental pollution in the dialogue.③Read the conversation again.Ask the students to find the ways to solve the problems of air and waste pollution.④Read aloud the conversation by the recording.⑤Learn the useful expressions：What are your ideas for doing…To cut down air pollution，we should…So together，our actions can make a difference and…⑥Role－play or read the conversation in pairs until fluently.★Step 3Homework1．What are your ideas for solving the waste pollution problem?2．Write the words about the four kinds of pollution.3．Translate the following sentences into English.(1)我们正在想办法拯救地球。

Unit13 we’re trying to save the earth
Unit13 we’re trying to save the earth
What is happening to the earth? Why should we try to save it?
the polluted river
the foggy sky
the dying soil
the noisy street /square…
Unit13 we are trying to save the earth What are destroying our environment?
the wastΒιβλιοθήκη waterthe waste gas from the factory
the loud music or noise from the mall
the strong flash
The worse is pollution causes the climate change and global warming , the higher temperature leads to storms and floods.
The sharks were caught.
The shark is being killed.
The man is cutting the fin off.
The fins will be delivered to the markets or the restaurants
Yao Ming ,the Chinese basketball star , are calling on us to protect sharks. As what he said in the Ad， when the buying stops, the killing can too.

words and expressions
The earth is polluted.
air pollution
n. 煤炭
The factories that burn coal pollute the air with a lot of black smoke.
water pollution
noise pollution air pollution water pollution _l_ou__d_m__u_si_c___ __f_a_ct_o_r_ie_s___ ____sh_i_p_s_____ __p_l_an__es______ __sm__o_k_in_g____ ___r_u_b_b_i_sh____ _m__o_b_il_e_p_h_o_n_e_s ___ca_r_s______ ___l_it_t_er_i_n_g___ b_u_i_ld_i_n_g_h_o_u_se_s_ b_u_il_d_in_g_h_o_u_s_es_ ___f_ac_t_o_r_ie_s___
Factories put waste into the river.
mobile phone pollution
litter v. 乱扔 n. 垃圾
rubbish waste 垃圾，废弃物
People should throw away litter in the bin.
n. 垃圾箱
noise pollution There are more cars on the road.
2. What are they talking about? The environmental problems.
3. What other problems do they see? There’s too much rubbish and waste in the streets.