新冀教版九年级全一册英语Lesson 26 Keep the Candle Burning课件

1、Lesson 26 Keep the Candle Burning Unit 5 Look into Science 学习目标Curriculum words: regret, examination, pain，wake up, get dressed, get Useful expressions: Let the candle burn for two or three minutes.When the candle stops burning, it has used up all the oxygen in the air.Functions: Master the new word

2、s: holder, shallow, lighter, match,examine, Grammar: as的用法 Sentences: Because about one fifth of the air is made up of oxygen, the water rises and fills about one fifth of the jar. How far does it rise?思 考新课导入思 考Do you like doing science experiments?Why or why not?新课讲解THINK ABOUT ITDo you like doing

3、 science experiments? Why or why not?What will happen if you put a jar upside down over a burning candle?课文呈现 Can you see the candle holder in this picture? The candle is pink. The candle holder is grey. The candle holder is “holding” the candle!新课讲解Science is so interesting! Im sure youll like this

4、 experiment!What do you need?a candlea candle holder a big glass jara shallow dishsome watera lighter or matches新课讲解What do you do?1Put the candle in the candle holder.2Put the candle holder on the dish.3Fill the dish half full with water.4Light the candle.5Let the candle burn for two or three minut

5、es.6Carefully put the jar over the candle until the top of the jar rests on the dish.7Examine the water in the jar. What can you see?新课讲解What is happening?As the candle burns，it uses the oxygen in the air. When the candle stops burning，it has used up all the oxygen in the air. The water inside the j

6、ar rises. How far does the water rise? Because about one fifth of the air is made up of oxygen，the water rises and fills about one fifth of the jar.Can you do this experiment?新课讲解Let s Do It !Read the lesson and fill in the blanks.1 Lets do the experiment together! Put the candle in the candle holde

7、r. Put the candle holder on the dish. Fill the dish half full with water. Light the candle with a_ or a lighter. What can you see? The candle is burning. _the candle burn for two or three minutes. Then carefully put the jar over it until the top of the jar rests on the dish. As the candle burns，it _

8、the oxygen in the air. match Let uses 新课讲解When the candle stops_，it has used up all the oxygen in the air. The water inside the jar _ and fills about _ of the jar. This is because about one fifth of the air is made up of oxygen. burning rises one fifth 新课讲解Circle the correct words to plete the sente

9、nces.2 1Dont (use up /push up) all of the ink. Leave some for me. 2The medical team (is made of / is made up of) five experienced doctors.3Please fill the hole (with /in) sand and water.4They didnt realize their mistake (until /as) we told them.5My brother wasnt (strong enough/enough strong) to lift

10、 the box.新课讲解PROJECTSCIENCE？THATS INTERESTING! Read about the experiment in this lesson. With a group of classmates，practice the experiment. Do your experiment in front of the class. Dont forget the following things： First，describe your experiment. Second，ask the class what they think will happen. T

11、hird，do the experiment. Finally，ask the class if the result is what they expected. 新课讲解 keep的用法PointLanguage point 1keep宾语形容词，意为“使保持某种状态”。 You cant sneeze and keep your eyes open at the same time.你不能在打喷嚏的同时让你的眼睛睁着。 keep sb. from doing sth. 阻止某人做某事，相当于“stop sb.from doing sth.”。 We should keep the chi

12、ldren from swimming alone in the sea.我们应该阻止孩子们单独在海里游泳。 keep (on) doing sth. 继续，重复做某事。 Keep smiling! 保持微笑！ 新课讲解 match/mt/ n.火柴，比赛 v.相称，相配 PointLanguage points 2eg：We need to light a match. 我们需要点一根火柴。 They beat us last time，but we hope to win the next match. 上次他们打败了我们，但我们希望赢得下次的比赛。 The picture matches

13、 the story. 这幅图和故事相配。新课讲解 half/hf/ adj.一半的 n.半； 一半 PointLanguage points 3half 意为“一半的”，作形容词。half an/a 名词，意为“个”。eg：half an hour 半个小时 half a day 半天 half an apple 半个苹果 Given half a chance, he will su eed. 只须给他一点儿机会，他就会成功。新课讲解half of意为“一半的”，后接名词时，一般要在名词前加the、形容词性物主代词或指示代词等。此结构作主语时谓语动词和of后的名词保持一致。即：若of后的名

14、词是复数则谓语动词用复数形式；若of后的名词是可数名词单数或不可数名词，则谓语动词用单数形式。 新课讲解 light的用法 PointLanguage points 4light/lat/ v. 点燃 eg：Will you light the fire for me，please? 请为我把火点燃，行吗？词性 含义 例句 n. 可意为“光线，电灯”。作“光线”讲时为不可数名词，作“电灯”讲时为可数名词。 The light was beginning to fail.天色渐暗。Dont forget to turn off the lights when you leave.当你离开的时候不

15、要忘了关灯。 adj. 意为“浅色的，轻的”。 Rose likes the light green skirt.罗丝喜欢那条浅绿色的短裙。新课讲解 until/ntl/ conj.直到为止 PointLanguage points 5eg：Im going to stay here until Saturday and start on Sunday. 我打算在这里一直呆到星期六，然后星期日出发。用于肯定句中，主句的谓语动词一般是延续性的。 用于否定句中，主句的谓语动词一般是非延续性的。eg：I didnt begin the work until he came back. 直到他回来我才

16、开始这项工作。新课讲解 as conj.当时；随着 adv.如同prep.作为； 如同PointLanguage points 6as可作连词，意为“随着，当时”。eg：As time went by, the environment got worse and worse. 随着时间的推移，环境变得越来越糟了。新课讲解辨析while，when与asPointLanguage points 7while 表示“在的时候，在期间”。它强调主句的动作与从句的动作同时发生或主句的动作发生在从句动作进行的过程中。while从句中的谓语动词必须是延续性动词。 when 表示“当的时候”。从句中的谓语动词

17、既可用延续性动词，又可用非延续性动词，这些动词既可以表示动作，又可以表示状态。也就是既可以指较短的时间(即某一具体时间)，也可以指一段时间。主句和从句的动作可以同时发生，也可以先后发生。 as 与以上两词同义，常可与when或while通用，但它着重指主句和从句的动作同时发生，不是一前一后。因此，还可意为“一边一边”。 新课讲解辨析stop doing sth.与stop to do sth. PointLanguage points 8stop doing sth. 停止正在做的事，doing sth.作宾语。 stop to do sth. 停下(正在做的事)去做另一件事，to do st

18、h.作目的状语。 新课讲解how far 多远 PointLanguage points 9用于询问两地间的距离，答语也要用表示距离的句子。eg：How far is it to your house from here? It is about 5 minutes walk. 从这儿到你家有多远？ 大约步行5分钟的路程。新课讲解how much 询问价格以及不可数名词的数量。 How much is the meat？肉多少钱？ How much water do you want？你想要多少水？ how many 询问可数名词的数量。 How many stamps have you co

19、llected？你已经收集多少张邮票了？ how old 询问年龄。 How old is your sister？ 你妹妹多大了？She is seventeen. 她十七了。新课讲解典例_is it from the village to your farm? About 10 minutes walk. (广东)AHow often BHow soonCHow long DHow far【点拨】考查疑问短语的辨析。采用逻辑推理法。how often多久一次；how soon多久以后；how long多长；how far多远，对距离提问。由句意“从村庄到你的农场有多远？”“大约步行10分钟

20、的路程。”可知选D。 D当堂小练一、根据汉语提示完成句子1Please pass me a _ (浅的) dish.2I need some _ (火柴) to light the candles.3There is onefifth _ (氧气) in the air.4After finishing all your work，you should _ (检查) it carefully.5We have _ (用完) our salt.shallow matches oxygen examine used up 当堂小练二、单项选择6Jim _all his money to buy the puter.