九級(jí)英語上冊(cè)Unit5LookintoScienceLesson26KeeptheCandleBurning課件（新版）冀教版

Lesson26:KeeptheCandleBurning!useup的用法I.Learningaims:Masterthenewwordsandphrases:holder,shallow,lighter,match,examine,oxygenII.Learningimportantanddifficultpoints:NewWordsholdershallowlightermatchexamineoxygen◆Doyouthinkscienceisinteresting?Whyorwhynot?◆NameoneortwofamousChinesescientists.Whatdoyouknowaboutthem?ThinkAboutIt!LanguagePointsas作連詞，意為“當(dāng)……時(shí)候”，引導(dǎo)時(shí)間狀語從句。如：1.Asthecandleburns,itusesupoxygenintheair.當(dāng)蠟燭燃燒時(shí)，它要耗盡空氣中的氧氣。Ashegrewup,hebecamesilent.他長(zhǎng)大以后，變得沉默寡言。useup意為“用完；用光”。useup是動(dòng)詞加副詞型短語，賓語是代詞時(shí)必須放在use和up的中間；賓語是名詞時(shí)，放在use和up的中間或up的后面均可。如：Don'tuseupallthehotwater.不要用光所有的熱水。（1）分?jǐn)?shù)的表達(dá)方式：分子為基數(shù)詞，分母為序數(shù)詞。并且當(dāng)分子大于1時(shí)，分母要用復(fù)數(shù)。如：2.Becauseaboutonefifthoftheairismadeupofoxygen,thewaterrisesandfillsaboutonefifthofthejar.空氣中含有五分之一的氧氣，所以水位上升并且占了罐子的五分之一。five-eighths八分之五（2）帶有分?jǐn)?shù)的名詞作主語時(shí)，謂語動(dòng)詞的單復(fù)數(shù)，要根據(jù)分?jǐn)?shù)所修飾的名詞來確定。如果分?jǐn)?shù)所修飾的是可數(shù)名詞復(fù)數(shù)，謂語動(dòng)詞用復(fù)數(shù)形式；如果分?jǐn)?shù)所修飾的是不可數(shù)名詞，謂語動(dòng)詞用單數(shù)形式。如：Aboutthree-fifthsofthestudentsinClassOneareboys.一班五分之三的學(xué)生是男生。Exercises1.Thewaterhereiss______,notdeep.2.Letthefireb______forafewhours.Theroomwillbeverywarm.3.Look!Theboyisplayingwithsome________(火柴).4.Thereislittle______(氧氣)atthetopofthemountains.5.Mr.Blacksatdownand________(點(diǎn)燃)acandle.I.根據(jù)首字母或漢語提示，完成下列句子。lit/lightedhallowurnmatchesoxygen1.Pleasepassmethebottlefull______water.2.Heissohungrythathehaseaten______allthefoodontheplate.3.Iusuallyputthecandle______thecandleholder.4.Mr.Gaocameintotheclassroom______abook