九年级英语Unit2 Topic 2 Section B 4课件仁爱版

Unit2Topic2Alltheseproblemsareveryserious SectionB Teachingaimsanddemands 2 Learntotalkaboutthesandstormanditsharm 1 Learnsomenewwordsandphrases sand desert sandstorm cutdown change into prevent from Step1Checkwords sanddesertsandstorm cutdownchange into prevent fromhumanbeingalthough 沙子沙漠沙尘暴砍倒把 变成阻止 防碍人虽然 Step2Lead in Whatcausessandstorm Whatkindofpollutionaretheytalkingabout Whatcausesit Theyaretalkingaboutthesandstorms Peoplehavecutdowntoomanytrees Step3listen readandsayTask1listenandanswer Task2Listenandrepeat Task3Workalone 1Peoplehavecutdowntoomanytrees 2Alotofrichlandhaschangedintodesert 3Treescanstopthewindfromblowingtheearthaway Theycanalsopreventthewaterfromwashingtheearthaway 4AlthoughwehavebuilttheGreatGreenWall westillneedtoworkhardtoprotecttheenvironment changeinto 把 变成 砍倒 stop preventsb sth from doingsth阻止某人 某物做某事 相当于though 引导让步状语从句 不能和but连用 Don t 砍倒 anytrees Ourschool 变成 myhome Thegovernment thepeople from trees 阻止人们砍树 myuncleisold helooksverystrongandhealthy Task4Finishthesentences cutdown haschangedinto prevents stopscuttingdown Although Step4Pairwork Doyouknowtherelationsbetweentrees humanbeingsandsandstorms Numberthepicturesandmakeyourownstoryinpairs 4 1 5 3 6 2 Makeupastoryaccordingto1c Youcanstartitlikethis longlongago thereweremanytreesinmyhometowntheairwasfreshandthewaterwascleanbutoneday longlongago thereweremanytreesinmyhometown Theycanpreventthewindfromblowingtheearthaway Theairwasfreshandthewaterwasclean Butonedaysomepeoplecametomyvillage Theycutdownalotoftreesforwood Theforestwasgonesoon Thewaterwashedtheearthawayandalotofrichlandchangedintodesert Asaresult sandstormscameintobeing StopingSandstorm Thesandstormisveryterrible Asastudent whatshouldyoudotostopsandstorm Step5Discussion Step6PracticeMakeanewdialogueaboutwaterpollutionWhat sthewaterlikenow Whatcausewaterpollution Howtoprotectandsavewater Writing1 Howtostopsandstorm1What stheweatherlikenow 2Whatcausesandstorms 3HowtostopsandstormWriting2 Howtosavewater Step7Homework 1 Ourteacherhavetoldus thetrees A cutoffB cutdownC nottocutoffD nottocutdown2 theycanswim theynevergoswimmingalone A Although butB Though butC Although D Because so homework D C 3 Thepolicementriedtopreventtrafficaccidents happening A fromB inC toD with4 Hedidn tcrosstheroaduntiltheredtraffic