Book5Unit1GreatScientists预习学案一．目标聚焦1、了解著名医生约翰·斯诺、钱学森、哥白尼等科学家。2、学会使用表示描述人物的句型3.学习过去分词作定语和表语的结构二．走进课文1.Readthepassageandnumbertheseeventsintheorderthattheyhappened.---JohnSnowbegantotesttwotheories.---AnoutbreakofcholerahitLondonin1854.---JohnSnowmarkedthedeathsonamap.---Heannouncedthatthewatercarriedthedisease.---JohnSnowinvestigatedtwostreetswheretheoutbreakwasverysevere.---KingCholerawasdefeated.---Hefoundthatmostofthedeathswerenearawaterpump.---Hehadthehandleremovedfromthewaterpump.2.Readthepassageandanswerthesequestions.JohnSnowbelievedIdea2wasright.Howdidhefinallyproveit?____________________________________________________________________________DoyouthinkJohnSnowwouldhavesolvedthisproblemwithoutmap?giveareason.____________________________________________________________________________Cholerawasa19thcenturydisease.whatdiseasedoyouthinkissimilartocholeratoday?why?____________________________________________________________________________三．句式点击1.WiththisextraevidenceJohnSnowwasabletoannouncewithcertaintythatpollutedwatercarriedthevirus.withthisextraevidence有了这个额外的证据；withcertainty肯定地，有把握地在句中作状语，相当于副词.that引导宾语从句polluted过去分词作定语2.Somanythousandsofterrifiedpeoplediedeverytimetherewasanoutbreak.terrified过去分词作定语everytime短语充当连词作用，还有themoment/minute/second;thefirst/second…lasttime;immediately/instantly/directlyeg:ThefirsttimeIwentabroadIcouldhardlyunderstandwhattheforeignerssaid.ThemomentIsawhim,Iknewwhathadhappened.3.Itseemedthatthewaterwastoblame.be﹢动词不定式，可以表示该做或不该做的事betoblame应该负责；应受责备eg:Nooneistoleavethisbuildingwithoutthepermissionofthepolice.Youarenottodroplitterinthispark.公园里不许乱丢垃圾。Whoistoblameforthefire?Whoistoberesponsibleforthis?4.Onlyifyouputthesuntheredidthemovementsoftheotherplanetsintheskymakesense.1only﹢加状语放于句首时，主句用部分倒装。eg:OnlyaweeklaterdidIreceiveananswerfromher....
