高中英语：Unit4 Astronomy the science of the stars预习学案（新人教必修3）.doc

用心爱心专心Unit4Astronomy:thescienceofthestarsI.预习内容：了解宇宙科学、地球生命的起源，了解万有引力、黑洞和太空旅行等天文知识，培养学生对科学的兴趣、激发学生探讨科学的热情。掌握本单元的词汇和习惯用法。学会在日常交际中正确运用指示语。掌握名词性从句中主语从句的用法。II.知识点2.However,accordingtoawidelyacceptedtheory,theuniversebeganwitha“BigBang’’thatthrewmatterinalldirections.Inalldirection=ineverydirection向四面八方Inonedirection朝同一个方向Inthedirectionof朝某个方向Underthedirectionof在某人的指导下Accordingtothedirections按照说明书3.what’smoreimportantisthatastheearthcooleddown,waterbegantoappearonitssurface.As作连词，引导了时间状语从句。还可以引导时间、原因、方式、让步等状语从句。当……时候相当与when/while，引导时间状语从句。但as较强调主句从句中的动作同时发生。随着Astimewenton,manychangestookplaceinmyvillage.因为，由于Wedon’tknowwhattodoaswewerejustvisitingthere.按照，如同方式状语从句YououghttodoasPaultellsyou.尽管，虽然让步状语从句引导的让步状语从句中，要用倒装，即把作表语的名词或形容词及作状语的副词放在句首（名词前不能加冠词）；有时，把谓语部分的动词原形提前。Childasheis,heknowsalot.Hardasheworked,hedidn’tpasstheexam.Tryasyoumay,youwon’tsucceed.Laterwhentheplantsgrewintoforests,reptilesappearedforthefirsttime.Forthefirsttime作状语，thefirsttime作连词引导时间状语从句。类似用法还有everytime/nexttime/eachtime;themoment/theminute;thefirsttime/second…lasttime;immediately/directly;imstantly等Eg:EachtimeIsawhim,Ithoughtofhispoorbrother.Hetookoffhiscoatthemomenthearrivedhome.Whytheysuddenlydisapperedstillremainesamystery.rPAGE\#"'Page:'#''"Page:1emain:⑴vi.留下；剩下⑵link.v+n./adj./tobedone依然不变，继续，保持e.g.Wherehehasgoneremainsamystery.Thedoorremainedlocked.Itsoundslikeagoodidea,butitremainstobeseenwhetheritwillsucced.Thefactremainstobeproved.remainingadj.剩下的，作前置定语，用法同therestof;left作“剩下的”讲时。作后置定语e.g.Heboughtagiftforhisdaughter,usingtheremainingmoney/therestof(his)money/themoneyleft.Weshallfeelitsgravitypullingus,butitwillnotbeasstrongapullastheearth’s.⑴as+adj.+a/an+n.+as和......一样Wehaveasbigahouseasourneighbour’s.⑵as+adj./adv.+asHedroveasfastashecould.⑶as+much+a/an+n.+asToholdtheOlympicGamesisjustasmuchacompetitionamongcountriesastowinanOlympicmedal.Itisgenerallybelievedthatteachingtisasmuchanartasitisascience.⑷as+much/many....+asReturnasmanybooks/muchmoneyasyouborrowed.breakout（战争，火灾等）爆发；（疾病）突