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Unit 8 Were trying to save the earth!The Sixth Period Grammar Focus / Self Check 【Teaching aims】一、听、说、读、写以下词汇：afford 了解以下词汇的读音和意义：reusable, transportation二、通过学习，口、笔头掌握下列句型：1) Yes, everyone should play a part in keeping the city clean. 2) Big things must be done to save the earth.3) A: We think everyone should use public transportation.B: We disagree. Its difficult for parents with young children to use public transportation 三、通过对本单元语法的复习与巩固，学会归纳与总结。 四、学生通过分析城市现状，培养自己的环保意识，并为我们的城市做力所能及的事情。 Difficulties：本单元语法的复习与巩固【Teaching steps】1. 本单元复习了哪几种语态？Jason thinks that the air is badly polluted. Susan used to see the mountains clearly. People are also littering in public places. They think that they can do nothing to help. They are talking about the noise pollution they have seen. 观察上面的黑体字内容，它们分别对应了几种时态或语态？1._ 2._ 3._ 4._ 5._。你能归纳出这几种时态或语态的结构吗？1._ 2._ 3._ 4._ 5._。 2. Fill in the blanks. Were _ (try) to save the earth.The river used to _ (is) so clean.The air is badly_ (pollute).No scientific students have _ (show) that shark fins are good for health.We should _ (help) save the sharks.3. Write different forms of the words. Then add more to each group.4. Work on 4a.Fill in the blanks with the correct forms of the verbs in brackets.Joe: _ you ever _ (take) part in an environmental project?Ken: Yes , I have . I _ (help) with a Clean-Up Day last year. It was _ (consider) the biggest clean-up project this city _ ever _ ( have ).Joe: How many people _ (take) part?Ken: I _ (think) more than 1,000 people _ (e) to help out.Joe: Thats fantastic! I guess everyone in this city is _ (try) to improve the environment.Ken: Yes, we cant afford to _ (wait) any longer to take action!5. Work on 4b.Fill in the blanks with the appropriate modal verbs from the box.People _ think that big things _ be done to save the earth. Many forget that saving the earth begins with small things. For example, you _ save electricity by turning off the lights when you leave a room. You _ also use reusable bags instead of plastic bags. I think its a great idea that you now _ pay for plastic bags in some stores. And instead of driving to school or work, you _ ride your bike or walk. If its far, you _ take the bus. All these small things _ add up and bee big things that _ improve the environment. Lets take action now!6. Match each statement with the grammar structure. Statement GrammarThe river used to be so clean.Present progressiveWe have seen many changes in the environment.Modal verbs People should take public transportation more.Passive voiceThe river is polluted by factories.Used to do The air pollution is getting worse and worse.Present perfect7. Work on Self Check 3.Make a list of things that people can do to help the environment and discuss your list with your partner A: I think everyone should use public transportation.B: I disagree. Its difficult for parents with young children to use public transportation 8. Work on Self Check 3.Write ways to cut down on these kinds of pollution.9. 单元小结
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