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Lesson 26:,Keep the Candle Burning!,use up,的用法,I.Learning aims:,Master the new words and phrases:holder,shallow,lighter,match,examine,oxygen,II.Learning important and difficult points:,New Words,holder shallow,lighter match,examine oxygen,Do you think science is interesting?Why or why not?,Name one or two famous Chinese scientists.What do you know about them?,Think About It!,Language,Points,as,作连词，意为“当,时候”，引导时间状语从句。如：,1.As the candle burns,it uses up oxygen in the air.,当蜡烛燃烧时，它要耗尽空气中的氧气。,As he grew up,he became silent.,他长大以后，变得沉默寡言。,use up,意为“用完；用光”。,use up,是动词加副词型短语，宾语是代词时必须放在,use,和,up,的中间；宾语是名词时，放在,use,和,up,的中间或,up,的后面均可。如：,Dont use up all the hot water.,不要用光所有的热水。,（,1,）分数的表达方式：分子为基数词，分母为序数词。并且当分子大于,1,时，分母要用复数。如：,2.Because about one fifth of the air is made up of oxygen,the water rises and fills about one fifth of the jar.,空气中含有五分之一的氧气，所以水位上升并且占了罐子的五分之一。,five-eighths,八分之五,（,2,）带有分数的名词作主语时，谓语动词的单复数，要根据分数所修饰的名词来确定。如果分数所修饰的是可数名词复数，谓语动词用复数形式；如果分数所修饰的是不可数名词，谓语动词用单数形式。如：,About three-fifths of the students in Class One are boys.,一班五分之三的学生是男生。,Exercises,1.The water here is,s,_,not deep.,2.Let the fire,b,_ for a few hours.The room will be very warm.,3.Look!The boy is playing with some _(,火柴,).,4.There is little _(,氧气,)at the top of the mountains.,5.Mr.Black sat down and _(,点燃,)a candle.,I.,根据首字母或汉语提示，完成下列句子。,lit,/lighted,hallow,urn,matches,oxygen,1.Please pass me the bottle full _ water.,2.He is so hungry that he has eaten _ all the food on the plate.,3.I usually put the candle _ the candleholder.,4.Mr.Gao came into the classroom _ a book in his hand.,5.The rainy day will last _ three days.,II.,用适当的介词填空。,for,of,up,in,with,1.,当蜡烛停止燃烧时，它已用光了空气中所有的氧气。,When the candle _ _,it _ _ _ all the oxygen in the air.,2.,我们班里五分之三是女生。,_ of the students,in our class are girls.,4.,为了完成那项工作，他工作了十个小时。,_ _ the work,he has worked _ ten hours.,III.,根据汉语提示，翻译下列句子，每空一词。,stops burning has,used up,Three-fifths,To finish for,Homework,Choose an experiment that you did before,and describe it in English.,
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