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1、Lesson17SavetheTigers!ThinkAboutItWherecanyouusuallyseeatiger?Doyouthinktigersneedourhelp?Whyorwhynot?TeachingAims:Ø1.Mastersomenewwords:century,courage,brave,reason,kill,cut.Ø2.Mastersomephrasesabouthowtoprotectanimals.Ø3.Discusssomewaystoprotectanimals.N
2、ewwordsatthebeginningof…,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thenumberof,……的数量aswell（除某事或某人外）还，也SavethetigersParagraph1BParagraph2CParagraph3AA.Tigersareindangerofgoingextinct.B.“SavetheTigers”isavolunteergroupthathopestostopthetige
3、rsfromdisappearing.CTigersareimportanttotheenvironment.Readandanswer:Howmanytigerswerethereatthebeginningofthe20thcentury?ReadandAnswer:Wheredotigerslive?ReadandAnswer:Whydosomepeoplehuntandkilltigers?1.Atthebeginningofthe20thcentury,thenumberoftigersinthe
4、wildwasaround100000.在二十世纪初期，野生老虎的数量大约是十万只。thenumberof意为“……的数量”，跟复数名词连用作主语时，中心词是number，谓语动词要用单数。anumberof表示“许多”，相当于many，修饰可数名词复数。作主语时，谓语动词用复数。例如：Thenumberofstudentsinourclassis50.Thenumberofpagesinthisbookis60.Anumberofstudentsareplantingtreesonthehill.Fill
5、intheblanks.1._T_h_e_n_u__m_b_e_r__o_fstudentsisabouttwenty.(……的数量)2.A__n_u__m_b_e_r__o_f__workersinthefactorycomefromthecountryside.(许多)3.Thenumberofthestudentsinourclass_is___(be)fifty.4.Anumberofstudentsinourclass__a_re_(be)fromJiuquan.5.Thenumberofpage
6、sinthisbook__is__(be)60.2.Inrecentyears,tigershavebeenindangerofdisappearing.在近几年，老虎处于濒临灭绝的危险中。indanger(of)意为“处于（……）危险之中”。例如You’reindangerofcatchingacold.Thesickmanisindangerofdeath.Thepassengersareindanger!Let’sgoandhelp!3.Asforestsdisappear,tigerslosethe
7、irhomes.随着森林的消失，老虎失去了它们的家园。as在句中作连词，引导状语从句，意为“随着，当……的时候”。Asthesunrose,thefogdisappeared.Asshelefttheroom,sherememberedthatbook.Fillintheblanks.1.It’s__im__p_o_r_ta_n__t_to_yourhealth.(对……是重要的)2.Theriverispollutedand_in__d_a_n_g_e_r_o_f_goingdry.(处于……危险中)3.
8、_A__s_timewentby,shebecamemoreandmorebeautiful.(随着)4.A__t_t_h_e_b_e_g_i_n_n_i_n_g_o_f_theparty,hegavemeagift.(在……之初)5.Thetemperaturehas_d_r_o_p_p_e_d__to_belowzero.(下降到)6.Itisatthebottomofthef_o_o_d__c_h_a_in
