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Lesson17SavetheTigersUnit3AnimalsAreOurFriendsLesson17SavetheTigers课前自主预习课堂互动探究Unit3AnimalsAreOurFriends课前自主预习单词闯关1.世纪________→________(复数)2．fur________3．symbol________4．勇气；胆量________5．勇敢的；无畏的________6．chain________7．balance________(兽类的)毛centurycenturies标志；象征courageLesson17SavetheTigersbrave链子；链条平衡；平稳单词闯关8.原因；动机；理由________9．disappear________→________(反义词)10．杀死________11．砍；切；剪；割________→________(过去式)12．Decrease_____________消失；失踪appearreasonkillcutcut使……变小；减少Lesson17SavetheTigers短语互译1.atthebeginningof…____________2．dropto____________3．foodchain____________4.inbalance____________5.aswell____________在……之初下降到；跌至食物链保持平衡也；还Lesson17SavetheTigers短语互译6.处于危险状态____________7．把……砍倒；减少____________8．……的象征____________9．……的数量____________10．在……顶端____________indangercutdownsymbolsof…thenumberof…atthetopof…Lesson17SavetheTigers句型在线1.在20世纪初期，野生老虎的数量大约是100000。Atthebeginningofthe20thcentury,________________________tigersinthewildwasaround100，000.2.近几年来，老虎濒临灭绝。________________________，tigershavebeen________________________disappearing.thenumberInrecentyearsinofdangerofLesson17SavetheTigers词汇点睛课堂互动探究●atthebeginningof在……之初[观察]Shelefthereatthebeginningofthismonth.月初她离开了这儿。[拓展]inthebeginning意为“起初，起先”，相当于atfirst。[探究]atthebeginningof表示“________________”，其后常接表示________的词。beginning此处作名词，意为“开始”。在……之初时间Lesson17SavetheTigers活学活用根据汉语意思完成句子这件事发生在21世纪初。Theeventhappened________________________________the21stcentury.atthebeginningofLesson17SavetheTigers●Atthebeginningofthe20thcentury，thenumberoftigersinthewildwasaround100,000.在20世纪初期，野生老虎的数量大约是100000。[辨析]thenumberof与anumberof句型透视Lesson17SavetheTigers词条含义及用法例句thenumberof意为“……的数量”，相当于thetotalof，后接可数名词的复数形式，作主语时，谓语动词用单数形式。Thenumberofthestudentsintheroomis20.房间里学生数量是20。Lesson17SavetheTigers词条含义及用法例句anumberof意为“许多”，相当于many,可被large,small,great等修饰，后接可数名词的复数形式，作主语时，谓语动词用复数形式。Agreatnumberofgirlslikeshoppingonline.很多女孩喜欢网购。Lesson17SavetheTigers活学活用2017·六盘水Thenumberofthestudents________over2，000inourschool.A.isB.areC.wasD.wereA【解析】考查主谓一致。thenumberof…意为“……的数量”，作主语时谓语动词用单数形式。故选A。Lesson17SavetheTigers