八年级英语上册 Unit 4 Topic 1 What.ppt

Unit4OurWorld,Topic1,earthn.地球；土，泥；大地,rainforestn.(热带)雨林,forestn.森林,Lookandlearn,Lookandguess!,Lookatthepicturesandcheckwhichquestionsthepassagecananswer.,Whatarerainforests?Howmanyanimalsarelivinginrainforests?Wheredoanimalsliveinrainforests?Whatcanwegetfromrainforests?Whyarerainforestsimportanttous?,Watchtheflashof1a,andfindouttheanswers.,Whatcanrainforestsgiveus?,视频1a-P85,1a,woodn.木头，木材；woods树木，森林,Rainforestsgiveus,rubbern.橡胶,Rainforestsgiveus,food,medicine,Rainforestsgiveus,fruits,Rainforestsgiveus,Listento1aandcompletethetable.Thencheckwithyourpartner.,hot,wet,dark,hot,6%,surface,plants,animals,fresher,cleaner,hold,cycling,climate,nature,wood,food,medicine,1b,录音1a-P85,1c,Readagainandanswerthequestions.,Whatdoestheword“cover”meaninParagraph1?Whyarerainforeststhelungsoftheearth?,Itmeans“覆盖”.,Becausetheplantsintheforestshelptomaketheairfresherandcleaner.,1c,Readagainandanswerthequestions.,3.Whyshouldweprotectrainforestswell?4.Canyouguesswhatthenextpartofthepassagewilltalkabout?,Becausetheyhelptoholdthewaterandkeepthewatercycling.Theyplayanimportantpartincontrollingtheclimate.,Yes.Thenextpartmaytalkaboutwhatweshoulddotoprotectrainforests.,Thelastsentenceinaparagraphmaytellyouwhatcomesnext.,1c,Readagainandanswerthequestions.,5.Whatshouldwedotoprotectrainforests?,Weshouldsavepaperandmustntusethechopsticksforonlyonce.,Rainforestscover6%oftheearthssurface.,sixpercent,Keypoints,数词%+ofthe,可数名词复数,可数名词单数/不可数名词,Eg:50%ofthestudentsinourclassareboys.70%oftheearthiswater.,成千上万的,成百上千的成百万上千万的，数以百万计的,hundredsof,millionsof,Thousandsandthousandsofanimalsliveinrainforests.,3.Manyofthemliveinthetreesover30metersfromtheground.over=morethan多于，超过eg:Ourclasshas_50students.4.Theyplayanimportantpartincontrollingtheclimate.playanimportantpart(insth.)在某事中起重要作用；参与（某事）Eg:他积极参加班级活动。He_classactivities.,over/morethan,playsanactivepartin,5.Butnowrainforestsarebecomingsmallerandsmaller.“形容词比较级+and+形容词比较级”越来越Eg.天气变得越来越暖和了。Theweathergetswarmerandwarmer.中国变得越来越强大。Chinabecomesstrongerandstronger.,越来越小,Groupwork,Discussthepicturesingroupsabouthowtoprotectrainforests.Thenwriteashortpassage.,showandtellpeopleabout,doanythingwecan，suchas,askpeoplenotto,askpeoplenottocut,Letsplant,Youcanwritelikethis:,Example:,Rainforestsareveryimportanttous.Itisnecessaryforustoprotectthemverywell.First,weshouldmakepeopleknowabouttheimportanceofprotectingthem.Thenaskpeoplenottocutdownthetreeswithoutplans.Forus,weshoulddosomethingaspossibleaswecan.Whenwehavemeals,wemustntusechopsticksforonlyonce.Inthelife,uselesspaperandbesurenottowasteit.,1.Learntodescribethesituationofrainforestsandtheimportancetotheearth.2.Talkabouthowtoprotectrainforests.3.usefulphrases:thousandsofcontroltheclimateover=morethanplayanimportantpart(insth