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, oxygenII. Learning important and difficult points: New Wordsholder shallowlighter matchexamine 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，意为作连词，意为“当当……时候时候”，引导，引导时间状语从句。
如：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，它当蜡烛燃烧时，它要耗尽空气中的氧气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 意为意为“用完；用光用完；用光”use up 是动是动词加副词型短语，宾语是代词时必须放在词加副词型短语，宾语是代词时必须放在use和和up的中间；宾语是名词时，放在的中间；宾语是名词时，放在use和和up的中间或的中间或 up的后面均可如：的后面均可如：Don't use up all the hot water. 不要用光所有的热水 （（1）） 分数的表达方式：分数的表达方式： 分子为基数词，分分子为基数词，分母为序数词并且当分子大于母为序数词并且当分子大于1时，分母要时，分母要用复数如：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. 空气中含有空气中含有五分之一的氧气，所以水位上升并且占了五分之一的氧气，所以水位上升并且占了罐子的五分之一。
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，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：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。
根据首字母或汉语提示，完成下列句子lit / lighted hallow urnmatchesoxygen 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. 用适当的介词填空用适当的介词填空forofupinwith 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，每空一词根据汉语提示，翻译下列句子，每空一词stops burning hasused upThree-fifthsTo finish for HomeworkChoose a experiment that you did before, and describe it in English. 。