# 英语通案魔板

Lesson 26:Keep the Candle Burning

【教学重难点】 重点：掌握本课单词，用英语准确地描述实验过程，通过听、读，反复呈现，实验操作突出重点。 难点：通过示范，实验操作来突破难点。 蜡烛、烛台、大的广口瓶、一个浅盘、一些水和一个打火机 Step 1：Warming up What’s this？(It’s a candle.)Yes，it’s a burning candle.We will have an interesting class.Can you guess what we will do in this class ？There are some things that may be 教 师 增 补：

used in an experiment.Do you want to know what will happen ？Today we’ll learn Lesson 26：Keep the Candle Burning. Step 2：Presentation 1.Watch，Say and Fill (1)What do we need? We need a candle，a candle holder，a big glass jar，a shallow dish，some water and a lighter. (2)What do we do? First，________ the candle ________ the candle holder. Then ________ the candle holder ________ the dish. Third ________ the dish ________ water. Fourth，________ the candle. Fifth，________ the candle ________ for two minutes. 2.Imagine and Predict If I put the jar over the candle until the top of the jar rests on the dish ，what will happen? I’m not sure./I’m sure it will... I think... Maybe... 3.Do，Observe and Answer Put the jar over the candle carefully until the top of the jar rests on the dish. (The candle stops burning.The water rises up.) 4.Then do Exercises 1 and 2 on Page 69 Step 3：Listen，read and think

1.Why did the candle stop burning? Because it has ________ the oxygen in the air.(used up) 2.Why did the water rise? Because the force outside the jar is ________ than the force inside the jar.(stronger) 3.How far did the water rise? Because there is about ________ oxygen in the jar ，so the water rises and fills about ________ of the jar.(one fifth，one fifth) Step 4：Explain the language notes of the text to the class 1.Keep the candle burning！让蜡烛燃烧！ keep... burning 使……燃烧。keep sth.(sb.)doing 使某物(某人)保持做某一动作状态。 2.use up 用光，耗尽。表示完全，彻底。 3.one?fifth 五分之一。 分数的表达： 分数由分子及分母两部分构成。用英语表达时，分子用基数形式，分母用序数词形式。若分子为 1 时，则分母的序数词为单数形式；若分子大于 1 时，则分母的序数词用复数形式。 口诀：分子基，分母序；分子>1,分母加 s. 如：1/3，one third，三分之一；1/5，one fifth，五分之一；3/4，three fourths，四分之三； 2/5，two fifths，五分之二 当堂练习，检测固学 1． This is a big class ,and _______ of the students are girls . A , two third A, get up A ,to wait 三、布置作业 1.Write the experiment that you have learned in this unit. 2.Project on Page69. 板 设 书 计 Lesson 26 use up 用光，耗尽 one?fifth 五分之一 Keep the Candle Burning B, second three B, getting up B , waits C, two thirds C, gets up C, waiting D ,two three 2. Mother makes me _______ early every day. D ,to get up D ,waited 3. I `m sorry to keep you _______ for a long time.

keep...burning 使……燃烧

5级英文作文模板一背通(... 7页 1下载券 %9B级作文模板一背通(作... ...四级作文模板 (i)说明原因型模块 currently, xx has been the order of the ...

4Aunit1通案
4Aunit1通案_四年级英语_英语_小学教育_教育专区。4A教案 ?390411393.doc 课题 Unit 1 I like dogs 课时 5-1 授课日期 1.能初步听懂、会读单词 cat, dog,...