Unit4Howlifebeganontheearth语言点市公开课金奖市赛课一等奖课件

1、Unit 4 How Life Began on the Earth Language points第1页1.No one knows exactly how the earth began, as it happened so long ago.No one knows what he was saying, as it was too hard.仿写：没人明白他在说什么，因为那太难了解了。 as在这里表示原因, 意思是“因为” As he was ill, he needed more help. 第2页2.However, according to a widely accepted t

2、heory, the universe began with a “Big Bang” that threw matter in all directions.1) begin with=start with：“以开始”.2)to begin with =to start with 能够单独使用,表示“首先; 第一; 起初; 最初”.在句中作时间状语.e.g. To begin / start with, I couldnt understand him at all. 第3页 in all directions. =in every direction/directions? 朝四面八方译：

3、The enemies ran away in all directions. 敌人四处逃窜。拓展： Im terrible with directions: _ a sense of direction: _ 在某人指导下: _ ones direction 方向感under我是路痴第4页What it was to become was uncertain be to do be to do sth. be + doing:_ be + done:_联想正在被动 (1)表示 禁止，命令 eg. You are not to smoke in this room. Youaretobebac

4、kby10oclock. 3. What it was to become was uncertain until between 4.5and 3.8 billion years ago when the dust settled into a solid globe . 第5页 (2)表示注定要All these things are to be answered for （偿还）.（3）表示“将”、“计划”、“安排”。(意思靠近于begoingto)如：. Thestudentsaretomeetattheschoolgatetomorrow. （4）应该 shouldYou are t

5、o look after the little children第6页. be to do :You _this to the police.你应该报警They _next month.他们计划于下个月结婚。2. The professor _a lecture at Wuhan University next weekend.give B. gives C. is to give D. being givenare to reportare to be married第7页What it was to become was uncertain until 他昨天直到七点才离开学校.He di

6、dnt leave school until seven oclock. 他们到了中国才能看了长城.They couldnt see the Great Wall until they came to China.It was not until they came to China that they could see the Great Wall.Notuntil直到才It is/was not until that 强调句It was not until seven oclock that he left school.第8页【巧应用】使大家惊奇是他竟没有参加会议。_ _ _ _ _h

7、e didnt come to the meeting.答案：What surprised everybody is that【精提取】What it was to become是what引导主语从句，what在从句中作become宾语。第9页1. _（使大家吃惊是）is that he didnt come to the meeting. What surprised everybody 2. _（他所做）added to our difficulty. What he did 第10页4.The earth became so violent that it was not clear w

8、hether the solid shape would last or not. 地球开始变得激烈动荡，不知道这个固体形状是否会继续下去。n. 固体 (solid, liquid, gas )adj. 固体, 坚固, solid:第11页cool down 变凉, 冷却,平息，冷静晒了一天太阳之后,他喜欢在海水中凉快一下.After a day in the sun, he liked to _ in the sea.他话平息了她怒气.His words _ her anger.cooled downcool down6. What is even more important is tha

9、t as the earth cooled down, water began to appear on its surface. 第12页 appear “出现, 似乎”是不及物动词当表示 “似乎, 好像”时是系动词, 该词无被动语态。 Our teacher appeared on TV this morning.第13页7.Water had also appeared on other planets like Mars but, unlike the earth, it had disappeared later. unlike prep. dislike v. likely adj

10、. unlikely adj.第14页8.It was not immediately obvious that water was to be fundamental to the development of life. 水会对于生命发展起关键作用,这一点在当初并不太显著.第15页allow to do = permit to doharmful adj. harmless harm n./v.be harmful to sb./sth.= do harm to sb. /sth.=do sb/sth harm 对有害9. What many scientists believe is t

11、hat the continued presence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas.第16页过多二氧化碳对环境有害.Too much carbon dioxide is the environment.harmful to does harm to第17页10.This produced a chain reaction, which made it possible for life to develop.chain reaction 连锁反应Ma

12、ke it possible for life to develop. 使生命发展成为可能 make it + adj./ n.+. to do sth. make / find / feel / think / consider that 从句第18页组长让我们能够一起合作.The group leader_老师让他们轻易地明白那个问题.The teacher _.made it possible for us to work together.made it easy for them to understand the question第19页1) multiply v. 乘: 增加,繁

13、殖；7乘以4等于28.4 multiplied by 7 is twenty-eight.我们功课自上高中以来增多了.Our homework have multiplied since we came to high school.蚊子在夏天繁殖得很快.Mosquitoes multiply rapidly in summer. 11. They multiplied and filled the oceans and seas with oxygen , which encouraged第20页 all sorts of =all kinds of 各种各样12. which encour

14、aged the later development of early shellfish and all sorts of fish.第21页13.Others, called amphibians, were able to live on land as well as in the water. 另外一些叫作两栖动物,它们既能在活水里生存也能在陆地上生. A as well as B表示“(除B之外)A也; 既B又A”. 如:Im learning French as well as English.我学英语之外还学法语.第22页He grows flowers as well as

15、vegetables.他既种菜也种花.“就远标准”：He as well as I _ (like) rock music.likes第23页15.They produced young generally by laying eggs.它们普通是经过孵蛋而繁衍后代.lie, lie , lay 区分以下:动词原形第三人称单数过去式过去分词现在分词汉字释义 lielies撒谎;谎话 lie lies躺; 位于 laylays放置; 下蛋liedliedlyinglaylainlyinglaidlaidlaying第24页（1）vi. （消息等）传开，流传。如：The news spread t

16、hrough the school very quickly.The fire spread from the factory to the house nearby.18. small clever animals, now with hands and feet, appeared and spread all over the earth. 第25页（2）v. “使伸展，延伸，张开”，常与out连用。He spreaded out his arms to welcome us.他张开手臂欢迎我们。第26页19.Thus they have, in their turn, become t

17、he most important animals on the planets thus adv. 所以；从而 She studied hard, _ .thus she got high marks2) In ones turn 轮到某人It will be _ to be on duty tomorrow.in Sams turn第27页20. They are putting too much carbon dioxide into the atmosphere, which prevents heat from escaping from the earth into space.

18、阻止某人做某事 :prevent sb. (from) doing sth. stop sb. (from) doing sth. keep sb. from doing sth. 注意：keep sb. from doing sth.中from不可省略,被动语态中,他们中from都不可省。第28页1) We must prevent them from making trouble. 2) You should prevent the child from injuring himself. 第29页21.Whether life will continue on the earth for

19、 millions Of years to come will depend on whether this problem can be solved.depend on : 依赖，依靠depend on sb. 依靠,相信某人depend on sth. 取决与某物第30页我们都靠你来做决定了Well all _to make a decision.明天是否能开校运会取决与天气Whether to hold the sports meeting or not will _.depend on youdepend on the weather第31页单词拼写 1. There is too

20、much _(暴力) on TV. 2. With the d _ of economy, peoples living standards are higher now. 3. Every night he observes the space through a t_. 4. The illness is s_ through the village. 5. One cannot e_ without air. 6. You will _ (逐步地) get used to the weather here. 7. By the time they reached the top of t

21、he mountain, they were _ (精疲力尽). 8. There is a big underground railway _(系统) in London, which is good for travelers. 9. Zhang Heng was one of the most famous Chinese a_ in the world. 10. The mammals _ (繁殖) when the animals, harmful to them, disappeared.第32页.短语利用 in all directions,go by,give birth to,in t