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1、Unit2SavingtheEarthTopic2SectionA一、学习目标：1、学习不定代词anything,something并复习现在完成时。2、掌握以下生词、短语：sand,sandstorm,desert,although,reduce,humanbeing,completely,changeinto,anumberof,stop…from,dieout…二、自主预习：（一）翻译：1、结果2、砍倒3、把……变成4、阻止某人做某事5、人6、对……有害7、吹走8、冲走9、大量、许多10、形成11、灭绝，消失12、在过去1
2、3、……的重要性（二）你能在1a中找出任何不定代词吗？你还能列举出更多的不定代词吗？____________________________________________________________________________________________________________________________三、合作探究：1、1a.①Listenandfinish1b.②Listenagain,andanswerthequestions.Q1：What’stheweatherliketoday?Q2：Wha
3、tcausesthesesandstorms?Q3：Dowestillneedtodosomethingtoprotecttheenvironment?③Enjoytheflashandfinish1c.2、Read.①Read1aandfindoutthesentencesofPresentPerfect.②Readanddiscuss.a.Thewindoutsideisblowingstrongly句子中的strongly可以换成hard吗？b.Alotofrichlandhaschangedintodesert.alot
4、of=____________________修饰____________________(u/c)changeinto译为______________________________eg：水变成了蒸气（steam）________________________________________c.Tresscanstopthewindfromblowingtheearthaway.stopsbfromdoingsth.译为________________=______________________eg：大雪阻止游人离开山顶。
5、____________________________________________________________d.Peoplehaveoutdownsuchalargenumberoftreesthat…anumberof译为________________________________________修饰______________________________（U/C）thenumberof译为________________________________________作主语时，谓语要用__________
6、__________（单数形式/复数形式）eg：用anumberof和thenumberof填空：Thereare__________carsintheparkinglot.__________thecarsisabout200.四、当堂评价：1、Retell2a.K：wind,sand,anythingM：sandstormsJ：atdown,asaresult,changeintoM：affectJ：stop…from…,blow…awayK：canbesavedJ：wash…awayK：isharmfulto,althou
7、gh,dosomething2、Finish2.3、Discussinpairs,complete3.4、Listenandcomplete4.五、拓展提升：1、Use“someone,something,anything,somewhere,anywhere.”tofillintheblanks.⑴Lily,worldyoulike__________todrink?⑵Cindyisverybusynow.Sheneeds__________helpher.⑶Isthere__________wrongwithyourcomp
8、uter?⑷Jimlookedforhispencil-box__________,buthedidn’tfindit.⑸Istayedathomelastweek,Ididn’tgo__________.2、根据Part3的图，小组讨论风暴的形式，并且写一篇有
