Lesson17:SavetheTigers1)thenumberof2)balance的用法3)danger的用法I.Learningaims:Masterthenewwords:century,fur,symbol,courage,brave,chain,balance,reason,disappear,kill,cut,decreaseII.Learningimportantanddifficultpoints:NewWordscenturyfursymbolcouragebravechainbalancereasondisappearkillcutdecreaseThinkAboutItWherecanyouusuallyseeatiger?Doyouthinktigersneedourhelp?Whyorwhynot?LanguageLanguagePointsPoints1.Atthebeginningofthe20thcentury,thenumberoftigersinthewildwasaround100000.在二十世纪初期，野生老虎的数量大约是十万。thenumberof是固定短语，意为“……的数量”，后接可数名词复数，但中心词是number，所以谓语动词要用单数。如：Thenumberofstudentsinourschoolhasgrownfrom1,000tomorethan1,500.anumberof为量词短语，意为“许多；大量”，相当于alotof或lotsof，中心词是该短语所修饰的可数名词复数，所以作主语时，谓语动词用复数形式。如：Anumberofstudentslikeplayingcomputergames.2.Ithelpskeepthenumberofotherwildanimalsinbalance.它可以帮助保持其他野生动物的数量平衡。balance在句中用作名词，意为“平衡；均衡”，常用短语beoutofbalance，意为“不平衡”；keepinbalance意为“保持平衡”；balance还作动词，表示“（使）平衡；（使）均衡”。如：Youmustlearntokeepyourbalanceinskating.在滑冰时你必须要学会保持平衡。3.Inrecentyears,tigershavebeenindangerofdisappearing.近年来，老虎已经面临消失的危险。danger意为“危险”，通常是不可数名词，表示做某事的危险或发生某情况的危险等，常用短语beindanger(of)，意为“在危险中”。如：Isthereanydangeroffire?有发生火灾的的危险吗？ExercisesExercises1.________(长颈鹿)arethetallestanimalsonland.2.Whatbeautiful__________(婚礼)clothestheyare!3.UncleYanvisitedmany______(亚洲的)countrieslastyear.4.Heisinterestedin_______(历史)historyI.根据句意及所给汉语提示，完成下列句子。GiraffesweddingAsian1.Oneoftheworld'sbiggestzoos_____(be)inEgypt.2.Mypetdog_____(die)twoweeksago.3._____(bar)keeptheanimalsinside.4.Theygot________(marry)onAugust,8th2008.5.TheSiberiantigeristhe______(big)cat(猫科动物)intheworld.biggestII.用所给单词的适当形式填空。isdiedBarsmarried1.Nobodyelsewantstogotothevillage.(改为同义句)______________wanttogotothevillage.2.LiuYangkepttwodogs.(改为否定句)LiuYang__________twodogs.3.Thosezooshavetenpandas.(改为同义句)__________tenpandasinthosezoos.ThereareIII.句型转换，每空一词。Nootherpeopledidn'tkeepHomeworkHomeworkWorkingroupsanddiscusssomewayswecanprotectanimals.Writedownyourideas.
