2023學(xué)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(jī)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(rèn)為自然有趣嗎？scientist自然科學(xué)，科學(xué)家。Scientific科學(xué)的Iboughtabookonsciencelastweek.我That’scalledthescientificmethod.Wearelearningtheknowledgeaboutscience.WangPenglovesscienceverymuch.Hewantstobeascientist.ashallowdish一個(gè)淺的盤子shallowadj.淺的。其反義詞是：deep深的。Pleasepassmeashallowdish(plate).請遞給我一個(gè)淺盤子。Theideaofthepassageisveryshallow.Icanunderstandit.這篇短文的意思很淺顯，我能讀懂它。lightthecandle點(diǎn)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(diǎn)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(xì)地，認(rèn)真地，小心地。caren.細(xì)心。細(xì)心的，認(rèn)真的。注意這三個(gè)詞的關(guān)系care(n.)+ful=careful(adj.)direful(adj.)+ly=carefully(adv.)。Jennyisacarefulgirl.Shedoeseverythingcarefully.詹妮是一個(gè)認(rèn)真的女孩。她做任何事情都非常仔細(xì)。Brianputhejaronthetablecarefully.布萊恩小心地把瓶子放在桌子上。Asthecandleburns,itusesupoxygenintheair.當(dāng)蠟燭燃燒的時(shí)候，需要消耗空氣中的氧氣。1)as在本文中的意義為“當(dāng)……的時(shí)候”。是一個(gè)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?yàn)椋℡ouwillfindthebuildingasyoureachtheendofthestreet.當(dāng)你走到這條街那頭，你就會看到那座大樓。（as當(dāng)……時(shí)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(shí)瓶子里的水就會上升。risev.上升，升起。這是一個(gè)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?jǐn)?shù)的表達(dá)：分?jǐn)?shù)由分子及分母兩部分構(gòu)成。用英語表達(dá)時(shí)，分子用基數(shù)形式，分母用序數(shù)詞形式。若分子為1時(shí)，則分母的序數(shù)詞為單數(shù)形式，若分子大于1時(shí)，則分母的序數(shù)詞用復(fù)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