2023學年完整公開課版Keepthecandleburning

Lesson26:

KeeptheCandleBurning!ThinkaboutitDoyouthinkscienceisinteresting?Whyorwhynot?Whatwillhappenifyouputajarupsidedownoveraburningcandle?Newwordsshallowadj.淺的matchn.火柴examinev.檢查oxygenn.氧氣lighter打火機candleholdern.蠟燭座useupbemadeupofmatchburnCandleholdern.Scienceissointeresting!I’msureyou’lllikethisexperiment!Whatdoyouneed?AcandleAcandleholderAbigglassjarAshallowdishSomewatermatchesWhatdoyoudo?

1.Putthecandleinthecandleholder.2.Putthecandleholderinthedish.3.Fillthedishhalffullwithwater.4.lightthecandle.5.letthecandleburnfortwoorthreeminutes.6.carefullyputthejaroverthecandleuntilthetopofthejarrestsonthedish.7.Examinethewaterinthejar.WhatcanyouSee?Whatishappening?Asthecandleburns,itusestheoxygenintheair.Whenthecandlestopsburning,ithasusedupalltheoxygenintheair.Thewaterinsidethejarrises.Howfardoesthewaterrise?Thereisaboutone-fifthoxygenintheair,sothewaterrisesandfillsaboutone-fifthofthejar.Keepthecandleburning!讓蠟燭燃燒！keep…burning使……燃燒。keepsth.(sb.)doing,使某物（某人）保持做某一動作。Don’tkeepthewaterfalling.不要再讓水繼續(xù)流了。Shekeptmeholdingthejarwithmyhand.她讓我一直用手握住瓶子。Doyouthinkscienceisinteresting?你認為自然有趣嗎？scientist自然科學，科學家。Scientific科學的Iboughtabookonsciencelastweek.我That’scalledthescientificmethod.Wearelearningtheknowledgeaboutscience.WangPenglovesscienceverymuch.Hewantstobeascientist.ashallowdish一個淺的盤子shallowadj.淺的。其反義詞是：deep深的。Pleasepassmeashallowdish(plate).請遞給我一個淺盤子。Theideaofthepassageisveryshallow.Icanunderstandit.這篇短文的意思很淺顯，我能讀懂它。lightthecandle點亮蠟燭，意同makethecandleburn，使蠟燭燃燒。1)lightn.光，光線。為不可數(shù)名詞；電燈。Themoonlightcomesintotheroomthroughthewindow.Don’tforgettoturnoffthelightswhenyouleave.2)lightadj.顏色淺的，（反義詞dark）；（分量）輕的，（反義詞heavy）Roselikesthelightgreenskirt.。Thebagisverylight.Marycancarryiteasily.3)lightv.點燃，照亮。It’stimetolightup.It’scoldintheroom.Let’slightafire.Carefullyputthejaroverthecandle.小心地把瓶子倒扣在蠟燭上。carefullyadv.仔細地，認真地，小心地。caren.細心。細心的，認真的。注意這三個詞的關(guān)系care(n.)+ful=careful(adj.)direful(adj.)+ly=carefully(adv.)。Jennyisacarefulgirl.Shedoeseverythingcarefully.詹妮是一個認真的女孩。她做任何事情都非常仔細。Brianputhejaronthetablecarefully.布萊恩小心地把瓶子放在桌子上。Asthecandleburns,itusesupoxygenintheair.當蠟燭燃燒的時候，需要消耗空氣中的氧氣。1)as在本文中的意義為“當……的時候”。是一個有著多重意義的詞。PleasedoitagainasIdid.請像我做的那樣再做一遍。（as像……一樣）Asitislate,Ihavetoleavenow.由于天太晚了，我得走了。（as由于，因為）Youwillfindthebuildingasyoureachtheendofthestreet.當你走到這條街那頭，你就會看到那座大樓。（as當……時候）2)useup用光，耗盡。表示完全，徹底。Hewashungryandateupthebread.他餓了，把面包全吃光了。（eatup吃光）Jimuseduphismoneytobuythecomputer.吉姆為了買電腦花光了所有的錢。Thewaterinsidethejarthenrises.這時瓶子里的水就會上升。risev.上升，升起。這是一個不及物動詞。Thesunrisesintheeast.太陽在東方升起。Theriverisrisingaftertheheavyrain.大雨后河水上漲。Thereisaboutone-fifthoxygenintheair,sothewaterrisesandfillsaboutone-fifthofthejar.氧氣在空氣中占五分之一，所以水面上升并且占據(jù)了瓶子的五分之一。one-fifth五分之一。我們來歸納一下分數(shù)的表達：分數(shù)由分子及分母兩部分構(gòu)成。用英語表達時，分子用基數(shù)形式，分母用序數(shù)詞形式。若分子為1時，則分母的序數(shù)詞為單數(shù)形式，若分子大于1時，則分母的序數(shù)詞用復數(shù)形式。如：1/3，onethird,三分之一1/5,onefifth,五分之一3/4,threefourths,四分之三