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Unit 2 Saving the Earth Topic 3 Section B一、教学目标：1、学习用ought to提建议。2、学习由连词or, and, but和while连接的复合句。3、掌握短语、词组的用法。4、从身边的小事做起，师生在一起保护环境，做一个环保人。二、自主预习：（一）英汉互译：1、环保人2、应该3、停止，关掉4、最好做5、代替6、路程短7、塑料袋8、行动胜于言辞9、尽力做10、说起来容易做起最难11、毕竟，归根结底（二）读下面的句子，猜猜画线的单词在句中的意思。1、I have just calked you, but you werent in. _2、Some things we have done are good for the earth while some are bad. _3、We have polluted the earth, and it is sick now. _4、Dont buy cups or boxes which and be used only once. _5、We should do everything to protect it, or well be punished and lose our home. _三、合作探究：Task 1：Listen and finish 1b.Task 2：Enjoy the flash and finish 1c.Task 3：Read 1a, work in groups.1、ought to情态动词，无_和_变化，后接_（V原/Ving），意为“应该，应当”否定形式为：_eg：我们应该礼貌对待老人。2、区别：It is/ was +adj+for sb+to do sth It is/ was+adj+of sb+to do sth当形式词用来描述人的性格，特征，品质时，通常选用of，这类形容词有good, kind, nice, wise, clever, foolish, right, wrong, careful等。eg：你能来实在太好了。对每一个人来说，保护环境都很重要。四、当堂评价：1、Retell 2a.Jane：greener person.M：Of course.J：ought to, shut off, leaveM：easy, nextJ：Second, instead ofM：save energy, reduceJ：Third, acloth bag, plastic bagsM：so easy toJ：EasierM：louder than2、Finish 2.五、拓展提升：1、Discuss in pairs, finish 3. Then listen and check.2、单选：( )Some people love pets, _ others hate them.A、asB、whenC、whileD、and( )Take more exercise, _ you will be healthier.A、butB、forC、andD、so( )Call a taxi, _ you will miss the train.A、andB、thoughC、becauseD、or( )Its getting dark, _ they are still working.A、andB、butC、soD、or六、课后检测：同步练习册Section B.2
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