冀教版英语九年级上册 Lesson 26 Keep the Candle Burning 导学案（含答案）

Lesson 26 Keep the Candle Burning 导学案 知识 目标 必 会 内 容 单词： holder,shallow,lighter,match,examine,oxygen 重点词组： use up, be made up of 重点句式： 1) Let the candle burn for two or three minutes. 2)When the candle stops burning, it has used up all the oxygen in the air. 3)How far does the water rise 4) Because about one fifth of the air is made up of oxygen, the water rises and fills about one fifth of the jar. 【学习目标】 1.重点单词: holder,shallow,lighter,match,examine,oxygen 2.重点词组: use up, be made up of 3.重点句式: (1) When the candle stops burning, it has used up all the oxygen in the air. (2) Because about one fifth of the air is made up of oxygen, the water rises and fills about one fifth of the jar. 【重点难点】 1. 重点：掌握重点短语和句型 2. 难点：分数的表达法。 【导学过程】 一、课前预习 核心单词 1. _____n. 火柴 v. 相称；相配 2. holder n. _____ 3. shallow adj. _____ 4. lighter n. _____ 5. examine v. _____ 6. oxygen n. _____ 单词变形 1. holder→_____(v. ) 2. shallow→_____(反义词) 3. examine→_____(n. ) 二、课堂学习 Step 1. 自主探究，合作交流 Read the text and fill in the blacks: Let’s do an experiment. First find a _____ and then put it in the _____.Where we put the candle holder Put it on the _____. _____ the dish _____ full of water . After that, we can _____ the candle .Let the candle _____ for two or three minutes. At last put the jar _____ the candle. What can we see As the candle burns, it _____ up oxygen in the air. When the candle stops _____, it has used up all the oxygen. The water inside the jar goes _____. Step 2. 交流展示 1. When the candle stops burning, it has used up all the oxygen in the air. 当蜡烛停止燃烧时，它就用完了空气中所有的氧气了。 use up意思是“用完、用光”，这是“_____”短语，相当于run out of。这类短语用名词作宾语时，名词可用在副词前，也可用在副词后；用代词作宾语时，代词则必须用在副词_____。 1) Our salt has _____ (用完)，please buy some. 2) Yesterday I used up all the salt to cook dumplings. I need to buy some now. A. ate up B. run out of C. ran of D. ran out of 3) I gave Li Ming a lot of pencils, but he_____ already. 我给了李明很多铅笔，但他已经把它们都用完了。 2. Because about one fifth of the air is made up of oxygen, the water rises and fills about one fifth of the jar. 因为组成空气的成分大约五分之一是氧气，所以水会上升并且填充瓶子的大约五分之一。 短语be made up of意为“由……组成”，后加名词或代词作介词宾语。 句中的one-fifth意思是“五分之一”，这是一个分数。分数的表达一般遵循以下规则：分子用_____数词，分母用_____数词；当分子大于一时，分母要用_____数形式；并且其中的连字符号有时可以不要。 1) This grade_____ ten classes. 这个年级是由十个班组成的。 2) It’s said that _____ of the water around the world _____ polluted. A. two third; has B. two thirds; have C. two third; are D. two thirds; is 3.Light the candle. light为_____词,意为“点燃”,可构成短语light up“点(烟),照亮”,宾语为代词时,应放在_____。light的过去式和过去分词为_____。 【拓展】(1)light作_____词时,意为“灯,光”。 　(2)light作形容词时 ... ...