冀教版九年級上冊英語 Unit 5 Look into Science 教案

Unit5LookintoScienceLesson25:Let'sDoanEs:Masterthenewwords:experiment,jar,upside,pour,correct,scientific,method,raincoat,force,pressure,concludeLearningimportantanddifficultpoints:Icoverthetopwithapieceofcardboardandholditthere.IamsosureofmytheorythatBriancandotheexperimentoveryourheadandIknowyouwon,tgetwet.Theforceoftheairkeepsthewaterinthejar.Itisstrongenoughtoholdthewater.LanguagePoints:Icoverthetopwithapieceofcardboardandholditthere.我用紙板把上面蓋住然后托住它?！居梅ā烤涫絚over…with…意為"用……覆蓋……”，類似句式becoveredwith表示“被覆蓋”，這是一個系表結(jié)構(gòu)?！九e例】①Mymothercoveredthetablewithcloth.我媽媽用布把桌子蓋住了。②Thebediscoveredwithpaper.床上蓋滿了紙。1amsosureofmytheorythatBriancandotheexperimentoveryourheadandIknowyouwon'tgetwet.我對布萊恩在你頭上做實驗的理論很有把握，并且你不會濕的。Learningaims:Masterthenewwords:DNA,blueprint,general,complex,twin,copy,repeat,pattern,identify,related,grandson,granddaughter,instructionIT.Learningimportantanddifficultpoints:Ingeneral,ablueprintisadrawingthatshowshowtoputahousetogetherwithmanydifferentparts.Butbuildingalivingthingisfarmorecomplexthanbuildingahouse.Eetwins,everylivingthinghasitsownuniqueDNA.FromyourDNA,scientistscanidentifynotonlyyou,butalsopeoplewhoarerelatedtoyou.YourDNAhasbillionsofinstructionsthatexplainwhyyouarethewayyouare.LanguagePoints:copy【用法】作可數(shù)名詞，意為“復(fù)制品、一本、一冊”，復(fù)數(shù)形式是copieso【舉例】①Thisisjustacopy.Haveyoufoundit?這只是一個復(fù)制品。你發(fā)現(xiàn)了嗎？②Iborrowedtwocopiesofmagazinesfromthelibrary.我從圖書館借了輛本雜志?！居梅ā孔骷拔飫釉~，意為“復(fù)制、抄寫”，后加名詞或代詞作賓語?！九e例】Haveyoufinishedcopyingthewords?你抄寫完單詞了嗎？【應(yīng)用】根據(jù)括號中所給漢語用適當(dāng)詞語填空。Wedon'tneedany（復(fù)制品）.Writethembyhand.答案：copies。表示“復(fù)制品”用名詞copy,且這里是復(fù)數(shù)形式。repeat【用法】作及物動詞，意為“重復(fù)、重述”，后加名詞或代詞作賓語?！九e例】Whataboutrepeatthetee?再重復(fù)一遍課文怎么樣？【拓展】在口語中，當(dāng)沒聽清對方的話或沒看清對方的動作要求對法重復(fù)時,為了表示客套，要用Pardon?或Begyourpardon?或Ibegyourpardon?【舉例】Pardon?Ididn,thearyourwordsclearly.請重復(fù)一遍好嗎？我沒聽清你的話?！緫?yīng)用】根據(jù)括號中所給漢語用適當(dāng)詞語填空。Theteacher（重復(fù)）thesentencesandIknewitsmeaningatlast.答案：repeatedo表示“重復(fù)”用動詞repeat,且這里是一般過去時。Butbuildingalivingthingisfarmorecomplexthanbuildingahouse,但是構(gòu)建一個有生命的東西比建一座房子復(fù)雜得多?！居梅ā勘容^級前可以用much,even,still,far,abit,alittle,alot等詞加以修飾?！九e例】①Thisunitismucheasierthanthatone.這個單元比那個單元容易得多。②Thisbookisfarmoreinterestingthanthatone.這本書比那本書有趣得多。答案：alittletallero此處用副詞alittle作狀語，修飾后面的比較級talleroEetwins,everylivingthinghasitsownuniqueDNA.除了一些雙胞胎外，所有有生命的東西都在自己獨特的DNAo【用法】exceptfor用于表示對主要部分的肯定和對局部的否定。它不表示同類事物之間的關(guān)系，其意思是“除了……以外、除去為了……、如果不是”?！九e例】①Smithisagoodman,eper.史密斯除了脾氣不好外，是個好人。②Motherwouldn,tgivehimanymoneyexceptforbooksandstationery.除了買書和文具外，媽媽不給他任何錢。③Exceptforyou,IwouldpasstheeyourDNA,scientistscanidentifynotonlyyou,butalsopeoplewhoarerelatedtoyou.根據(jù)你的DNA,科學(xué)家不僅能辨別出你，而且能辨別出與你有關(guān)系的人?！居梅ā縩otonly-butalso…是等立連詞，意思是“不但而且……”，它可以連接句中句子成分相同的部分，如果用它連接主語時,謂語動詞應(yīng)該以butalso后面的主語為準(zhǔn)?！九e例】①ShecansingnotonlyChinesesongsbutalsoEnglishsongs.她不僅會唱中文歌曲，還會唱英文歌曲。②NotonlyIbutalsoshehasfinishedthework.不僅我完成了工作，她也完成了工作?！居梅ā慷陶Zberelatedto意為“與……有關(guān)系”，后加名詞或代詞作介詞to的賓語?！九e例】IthinkDannyisrelatedtothismatter.我想丹尼與這件事情有關(guān)。Lesson30:ScienceAffectsUsLearningaims:Masterthenewwords:affect,suggest,mobilephone,discovery,amazingLearningimportantanddifficultpoints:First,getajarfullofwaterandapieceofcardboard.Thehigherairpressureoutsidethejarholdsthecardboardinplace.Theexperimentyoudidsoundsinteresting.Scientificdiscoveriesaremakingourlivesbetterandbetter.LanguagePoints:詞匯詳解suggest【用法】作及物動詞，意為“建議、暗示”,后加名詞、代詞、動名詞作賓語；也可用在句式suggestsomebodytodosomething這一句式中，表示“建議某人做某事”?！九e例】①Theysuggestedbuildinganewschool.他們建議建一所新學(xué)校。②Isuggestyoutodolikeme.我建議你想我一樣這么做。③Hisreportsuggestedthehugeloss.他的報告暗示了巨大的損失。【拓展】suggestion是它的名詞形式，意為“建議”，作可數(shù)名詞，復(fù)數(shù)形式是suggestionso【舉例】Theygavesomeusefulsuggestionsatthemeeting.在會議上他們給我們提出了一些有用的建議。【應(yīng)用】用括號中所給詞語的適當(dāng)形式填空。Nobody(建議)repairingthemachinebyourselves,sowehadtohaveitrepaired.答案：suggestedo表示“建議”用動詞suggest,且這里是一般過去時。discovery【用法】作可數(shù)名詞，意為“發(fā)現(xiàn)、發(fā)覺”，復(fù)數(shù)形式是discoveries?！九e例】Thisisanimportantdiscovery.Weshouldpaymoreattentiontoit.這是一個重要的發(fā)現(xiàn)。我們必須注意它?！就卣埂縟iscover是及物動詞，意為“發(fā)現(xiàn)”，后加名詞、代詞或賓語從句?！九e例】Wehavediscoveredtheirsecrets.我們已經(jīng)發(fā)現(xiàn)了他們的秘密。【應(yīng)用】用括號中所給詞語的適當(dāng)形式填空。Haveyounoticedthose(discover)?Theyarehelpfultous.答案：discoverieso表示“發(fā)現(xiàn)”用名詞discovery,且這里用復(fù)數(shù)形式。First,getajarfullofwaterandapieceofcardboard.首先，取滿滿一罐子水和一張硬紙片?！居梅ā烤渲械亩陶Zfullofwater用在名詞jar之后作定語，不定式、介詞短語、副詞和定語從句都可用在名詞后作定語?！九e例】①Ihavealotofworktodo.我有很多要做的工作。（不定式在名詞后作定語）②TheeraseronthedeskisMary's.書桌上的橡皮是瑪麗的。（介詞短語在名詞后作定語）③DidyoumeetJohnonyourwayhome?你在回家的路上遇見約翰了嗎？（副詞在名詞后作定語）④ThisisthepenthatTmlookingfor.這就是我正在找的筆。（定語從句在名詞后作定語）[\Scientificdiscoveriesaremakingourlivesbetterandbetter.一些科學(xué)發(fā)現(xiàn)使我們的生活變得越來越美好?！居梅ā俊氨容^級+and+比較級”表示“越來越”。【舉例】①Mysisterisgrowingtallerandtaller.我妹妹長得越來越高。②Ourcityisbecomingmoreandmorebeautiful.我們的城市變得越來越美了。【用法】這句話中的句式besureof意為“對……有把握"；thatBriancandotheexperimentoveryourhead是定語從句，修飾前面的名詞theoryo【舉例】①Areyousureofthismatter?你對這件事情有把握嗎？②ThisisthebookthatIborrowedfromthelibrary.這是我從圖書館借的書。Itisstrongenoughtoholdthewater.它力量很大足以把水托住?！居梅ā烤渲械膃noughtodo…意為"足以……做某事”，這里的enough起副詞作用，用在形容詞或副詞后作狀語?！九e例】Allanisoldenoughtogotowork.艾倫到上班年齡了。Lesson26:KeeptheCandleBurningLearningaims:Masterthenewwords:holder,shallow,lighter,match,examine,oportantanddifficultpoints:Letthecandleburnfortwoorthreeminutes.Whenthecandlestopsburning,ithasusedupalltheoxygenintheair.Howfardoesitrise?Becauseaboutonefifthoftheairismadeupofoxygen,thewaterrisesandfillsaboutonefifthofthejar.LanguagePoints:詞匯詳解Whenthecandlestopsburning,ithasusedupalltheoxygenintheair.當(dāng)蠟燭停止燃燒時，它就用完了空氣中所有的氧氣了?！居梅ā縰seup意思是“用完、用光”，這是“動詞+副詞”短語。這類短語用名詞作賓語時，名詞可用在副詞前，也可用在副詞后；用代詞作賓語時，代詞則必須用在副詞前。【舉例】IgaveLiMingalotofpencils,buthehasusedthemupalready.我給了李明很多鉛筆，但他已經(jīng)把它們都用完了。Becauseaboutonefifthoftheairismadeupofoxygen,thewaterrisesandfillsaboutonefifthofthejar.因為組成空氣的成分大約五分之一是氧氣，所以水會上升并且填充瓶子的大約五分之一?！居梅ā慷陶Zbemadeupof意為“由……組成”,后加名詞或代詞作介詞賓語?！九e例】Thisgradeismadeupoftenclasses.這個年級是由十個班組成的?！居梅ā烤渲械?。ne-fifth意思是“五分之一”，這是一個分?jǐn)?shù)。分?jǐn)?shù)的表達(dá)一般遵循以下規(guī)則：分子用基數(shù)詞，分母用序數(shù)詞；當(dāng)分子大于一時，分母要用復(fù)數(shù)形式；并且其中的連字符號有時可以不要?！九e例】one-fourth四分之一threefifths五分之三Lesson27:PlanetDannyLearningaims:Masterthenewwords:telescope,solar,unless,double,mysteryLearningimportantanddifficultpoints:Trylookingthroughtheotherend.MaybeBrianandIcanjoinyouaftersupper.Scientistsusehugetelescopeswhentheylookforplanets.Well,it'sworthatry,evenifIdon'tfindaplanet.LanguagePoints:double【用法】作可數(shù)名詞，意為“兩倍、雙倍”，復(fù)數(shù)形式是doubles?！九e例】Homeworkisdoubleatweekend.在周末作業(yè)是雙倍的?！居梅ā孔餍稳菰~，意為“雙倍的、兩倍的、兩用的”，在句中作定語或表語。【舉例】①Ithinkyouwillgetdoubleharvest.我想你們會有雙倍的收成。②We'dlikeadoubleroom.我們想要一個雙人間。MaybeBrianandIcanjoinyouaftersupper.晚飯后或許布萊恩和我會加入到你這里。【用法】動詞join在這里表示“加入”，如果表示“加入到某人的某種活動中”可用句式j(luò)oinsomebodyin…?！九e例】Lisa,canyoujoinusinthegame?麗薩,你能和我們一起做游戲嗎?Well,it'sworthatry,evenifIdon'tfindaplanet.好的，這值得一試，即使我沒有發(fā)現(xiàn)行星?！居梅ā縠venif意思是“即使、縱然”，引導(dǎo)讓步狀語從句，表示某種條件?！九e例】Hewillcomeontimeevenifitrains.即使下雨，他還是會準(zhǔn)時來的。【拓展】在口語中，evenif往往用在句首?！九e例】Evenifheispoor,healwayslookshappy.即使他很窮，但看上去他總是很快樂。Lesson28:TheStudyofLivingThingsLearningaims:Masterthenewwords:ChipTaylor,biology,butterfly,migrate,fantastic,completely,grandchild,female,milkweed,chemical,puzzlingIT.Learningimportantanddifficultpoints:FantasticfactsaboutthebutterflyhavebeendrawingDr.TaylorJsattention.Here,asmanyas230millionbutterfliesspendthewinter.ButinMexico,peoplecutdownthetreesthatthebutterfliesneedtorestonbecausetheywantmorelandforfarming.Thisisbothpuzzlingandinterestingformanyscientists.LanguagePoints:fantastic【用法】作形容詞，意為“奇異的、極好的、了不起的”，在句中作定語或表語?！九e例】①Ithinkthisisafantasticinvention.我想這是一個了不起的發(fā)明。②Theseflowersaresofantastic.Theyhavemanydifferentcolours.這種花太奇異了。它們有很多不同的顏色。chemical【用法】作可數(shù)名詞，意為“化學(xué)物質(zhì)、化學(xué)制品”，復(fù)數(shù)形式是chemicalso【舉例】Therearenochem