新概念二册53课课件(共38张).ppt

1、forest fireWhat may cause the forest on fire?What will be the possible results/effects?What can be done to prevent forest fires?Causes of forest fire Human reason is one of the biggest factors Long dry weather(drought)may also cause ground temperature rising,forest material easy cause spontaneous co

2、mbustion lightning can also cause firea forest fire caused by the drought in Guizhou Province inMarch 5tha forest fire caused by human activity in Australiaa forest fire caused by lightning in CaliforniaTerrible effects of forest fireFire destroyed forest creaturesThe air will be polluted,and people

3、s lives will be in dangerTo put out the forest fire cost a lot of human,material and financial resourcespreventive measurespreventive measures Set up/found fire organizations No smoking in the forest Sources must be strictly controlled Enhance/strengthen the consciousness of fireA True StoryA bear w

4、ent out of the zoo to search for his child.Surrounded by so many people,he climbed the electrical pole out of panic(惊慌惊慌).When he reached the top of the pole,he didnt know what to do.He decided to get down,but unfortunately,he was killed for touching the wire.Finally,he fell from the pole and was bu

5、rned to death.What will happen when an eagle throws a snake right around an electrical pole and electrical wire?It will catch fire/be on fire!【New words and expressions】hot adj.带电的，充电的带电的，充电的fireman n.消防队员消防队员cause v.引起；引起；n.原因原因examine v.检查检查accidentally adv.意外地，偶然地意外地，偶然地remains n.尸体，残骸尸体，残骸wire n

6、.电线电线volt n.伏特（电压单位）伏特（电压单位）power line 电力线电力线solve vt.解决解决mystery n.谜（无法接受地谜（无法接受地,解释解释不了的）不了的）mysterious adj.snatch v.抓住抓住spark n.电火花电火花 What caused the fire in the story?An unusual explanationCareful reading1.Where did the big forest fire break out?2.Has the fire been put out?3.What have the firem

7、en been trying to do ever since then?4.What are forest fires often caused by?5.Did they find any broken glass or cigarettes?6.How did the fireman discover the cause?7.What did the fireman notice?8.What is his explanation?9.Do you think the explanation acceptable?1.The big forest fire broke out in Ca

8、lifornia.2.Yes,it has been put out at last.3.They have been trying to find out how the fire began.4.Forest fires are often caused by broken glass or by cigarette ends which people carelessly throw away.5.No.Though the firemen examined the ground carefully,they were not able to find any.6.They discov

9、ered the cause accidentally/quite by accident.偶然地偶然地7.He noticed the remains of a snake which was wound round the electric wires of a 16,000-volt power line.8.A bird had snatched up the snake and dropped it onto the wires.Then the snake wound itself round the wires and sent sparks down to the ground

10、,starting a fire.9.The explanation is simple and unusual,but acceptable in my opinion.1.hot adj.带电的带电的,充电充电的的;热的；新鲜的；棘手的；带热的；新鲜的；棘手的；带电的电的,充电的充电的hot-hot-hot 麻辣烫麻辣烫；hot-wings 辣鸡翅；辣鸡翅；hot dog 热狗热狗hot-tempered 火暴火暴(脾气脾气)的的hot line 热线；热线；hot topic 热门话题热门话题a hot cake 畅销畅销,热销热销=best seller 畅销的东西畅销的东西hot p

11、otato 棘手的问题棘手的问题hot news 最热点的新闻最热点的新闻2.fireman n.消防队员消防队员hydrant n.hadrnt消防栓消防栓,消防龙头消防龙头fire extinguisher kstgw 灭火器灭火器 （extinguisher n.熄熄灭者灭者,灭火器）灭火器）extinguishput out a big fire 灭火灭火3.Have been doing5年前我在这家工厂工作过。年前我在这家工厂工作过。I worked in the factory 5 years ago.你在这家工厂工作过吗？你在这家工厂工作过吗？Have you ever wor

12、ked in this factory?我没去过重庆。我没去过重庆。I havent been to Chongqing.我在这家工厂已经工作了我在这家工厂已经工作了15年了。年了。I have been working in this factory for 15 years.已经连着下了三个星期的雨了。已经连着下了三个星期的雨了。It has been raining on end/continuously for 3 weeks.4.look for/find/find out find out （经过研究、努力等）找出，发（经过研究、努力等）找出，发现，查出现，查出（这里（这里find

13、 out的宾语是个从的宾语是个从句）句）Ill try and find out the name of the person who saved my life yesterday.科学家们尚未发现生命是如何开始的。Scientists havent found out how life began.5.【Special Difficulties】cause v.&n.引起；原因引起；原因 v.引起引起cause sth./be caused by 引起麻烦引起麻烦Pride causes failure.骄傲使人失败骄傲使人失败 The accident is caused by care

14、lessness.事故由事故由粗心导致粗心导致cause sb.to do sth.导致某人做某导致某人做某事事Illness caused him to lose his temper.(lose ones temper 发火发火)n.原因，强调事情发生的直接原因原因，强调事情发生的直接原因(一个一个)because 因为因为 reason 理由，其他各种的理由理由，其他各种的理由(很多个很多个)Give me your reasons for going there.What was the cause of the delay?作作“原因原因”讲时，讲时，reason与与cause可互换

15、，可互换，但但reason与介词与介词for连用；而连用；而cause则与介则与介词词of连用。连用。reason n.理由，原因理由，原因reason后面通常跟后面通常跟why引导的从句：引导的从句：That was the reason why the meeting was put off.v.推理，劝导，说服推理，劝导，说服reason with sb.劝说劝说(以道理以道理)，理论，理论 How can you reason with him when he is so worried?【Special Difficulties】6.Throw to，Throw at and Thr

16、ow awaythrow作及物动词主要含义为作及物动词主要含义为“投，掷，抛，扔投，掷，抛，扔”。throw to(sb.)扔给（某人）扔给（某人）He threw the ball to me and I caught it.throw at 对准某一目标扔对准某一目标扔 The boy threw a stone at the window and broke it.throw away 扔掉，丢弃扔掉，丢弃 Many people throw away cigarette ends carelessly.7.Sure=certain?I am sure that.I am quite s

17、ure that the fire is caused by a hot snake.Be sure of the cause of the fire.I am not sure about that.Sure!/of course!It is sure that?8.examineexamine v.检查检查examine the soiltake an exam.参加考试，接受检查参加考试，接受检查check v.核实核实,核对核对Check the emailCheck in/out登记入住，结账离开登记入住，结账离开9.accidentally adv.意意外地外地,偶然地偶然地(但更

18、趋向但更趋向于于“偶然偶然”的意思的意思)=by accident/chanceunexpectedly adv.出出乎意料地乎意料地(更趋向于更趋向于“意意外外”的意思的意思)10.wind vt.缠绕，卷在缠绕，卷在上；盘旋，上；盘旋，蜿蜒蜿蜒 vt.缠绕，卷在缠绕，卷在上（常与上（常与around/round连用）连用）Did you wind this piece of wire round the tree?vt.蜿蜒，盘旋蜿蜒，盘旋wind ones way 蜿蜒而行蜿蜒而行 11.power1）电力，动力电力，动力 electric power 电力电力water power 水

19、力水力2）力）力,能力能力（自然的体力、智力）（自然的体力、智力）His power is failing.他的体力在衰退。他的体力在衰退。3）权力）权力,支配力支配力,势力势力 political power 政治权力政治权力not within ones power=beyond ones power 力所不能及力所不能及我无法理解计算机是如何工作的。我无法理解计算机是如何工作的。It is beyond my power to understand how the computer works.wiren.金属线，电线金属线，电线 telephone wires 电话线电话线Electr

20、ic wires 电线电线wireless adj.无线的无线的 wireless telegraph 无线电报无线电报volt n.伏特伏特voltage n.电压电压,伏特数伏特数12 solve v.解决解决solve the mysterysolve the problemsnatch v.抓住抓住catch v.抓，如抓鱼抓，如抓鱼hold v.握着握着snatch v.(突然抓起来突然抓起来)强调动作的突然性强调动作的突然性seize v.抓住抓住(用力用力)seize my arm13.Drop and Falldrop vi.&vt.（使）掉下，（使）落下，（使）掉下，（使）落

21、下，放下（强调的是不小心掉下来）放下（强调的是不小心掉下来）As he walked past the tree,an apple dropped from it.The waiter dropped a fork.fall vi.落下，（雨、雪）下，降，跌落下，（雨、雪）下，降，跌倒，摔倒（强调的是掉下来的概念倒，摔倒（强调的是掉下来的概念,动作）动作）I fell and hurt myself.When leaves fall in autumn,Ill come back.translation At last firemen have put out a big forest fir

22、e in California.Since then,they have been trying to find out how the fire began.Forest fires are often caused by broken glass or by cigarette ends which people carelessly throw away.Yesterday the firemen examined the ground carefully,but were not able to find any broken glass.They were also quite su

23、re that a cigarette end did not start the fire.This morning,however,a firemen accidentally discovered the cause.He noticed the remains of a snake which was wound round the electric wires of a 16,000-volt power line.In this way,he was able to solve the mystery.The explanation was simple but very unus

24、ual.A bird had snatched up the snake from the ground and then dropped it on to the wires.The snake then wound itself round the wires.When it did so,it sent sparks down to the ground and these immediately started a fire.熟读课文并抄写课熟读课文并抄写课文的重点单词词组文的重点单词词组2遍遍（中文（中文1遍）遍）WB exxCJack looked at his watch for

25、 the twentieth time.Suddenly Jill arrived.Ive been waiting for over an hour,he said angrily.You never come on time.Oh,is that so?Jill answered.Were you here at 2.30?Jack went red.Well,he said,I got here five minutes late myself,but you werent here.I came here at exactly 2.30,Jill said,and I waited for five minutes,but you didnt come.What have you been doing since then?Jack asked.Ive just been to the hairdressers，Jill answered brightly.Bye bye!Se!