unit 3 animals are our friends lesson 17 save the tigers 课件2

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1、Lesson17SavetheTigersUnit3AnimalsAreOurFriendsRiddleItusuallyhasorangefuranddarkstripes.Itisthekingintheanimalworld.Whatanimalisit?Indochinesetiger（印度支那虎）Malayantiger（马来亚虎）Siberiantiger（西伯利亚虎）Whatdoyouwanttosay?Stop!Stop!Stop!Stophunting!Stopkilling!Love!Love!Lov

2、e!Lovetigers!Loveanimals！Lovetheearthwelive!Loveourselves!NewwordsStructuresandExpressionsatthebeginningof…在……之初dropto下降到；跌至foodchain食物链inbalance保持平衡indanger处于危险状态cutdown把……砍倒；减少aswell（除某事或某人外）还；也Wherecanyouusuallyseeatiger?ThinkAboutIt2.Doyouthinktigersneedour

3、help?Howmanytigerswasthereatthebeginningof20thcentury？ReadandAnswer:世纪的表达：century的复数为centuries。当表示第几世纪，要用序数词前加定冠词the*Thisbookwaswritten_____(century)ago。Thetelephonewasinventedin_____(a/an/the)19thcentury.centuriesthethenumberof和anumberof的区别thenumberof表示......的数量

4、后接可数名词的复数形式，作主语时，谓语动词用单数。Thenumberofthestudentsinourschool____(be)about3500.anumberof为许多、大量，作主语时，谓语动词用复数。Anumberofstudents___(be)playingintheplayground.areisafewthousand几千thousandsof数以千计的当hundred,thousand前面是基数词one,two,three…,afew,many时，其后不加s.当hundred,thousand后面加s

5、时，需要跟of修饰可数名词复数。Eg:Therearethreethousandstudentsinourschool.Thousandsofstudentsareonthesquare.ReadandAnswer:Wheredotigerslivein?beimportanttosb./sth.·······对于·······来说是重要的beimportantforsb.todosth.做某事对某人来说是重要的Eg:Timeisimportanttome.时间对我来说很重要Itisimportantforyoutole

6、arnEnglishwell.对你来说学好英语很重要ReadandAnswer:Whydosomepeoplehuntandkilltigers?indanger（of）处于(······)危险之中，of后接名词或V-ingEg:Thesickmanisindangerofdeath.这个病人有死亡的危险。n.You’reindangerofcatchingacold.你有患感冒的危险。V-ingThelittleboyisindanger!Let’sgoandhelp!这个小男孩有危险！让我们去帮忙吧！aswell位于

7、句首或句末，在局末尾时，不用逗号分开。用于肯定句。too位于句末，前面用逗号分开。用于肯定句。either位于句尾，其前有无逗号均可。用于否定句。also位于be动词和助动词之后，行为动词之前，用于肯定句。表示“也”的短语和单词Thankyou!