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1、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 oxygenDo you think science is interesting? Why or why not? Name on
2、e or two famous Chinese scientists. What do you know about them?Think About It !Language Pointsas 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
3、”。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：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 oxyge
4、n, 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
5、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。 Exercises1. 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.
6、 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 urnmatchesoxygen1. 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
7、 _ 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。forofupinwith1. 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 forHomeworkChoose a experiment that you did before, and describe it in English.
