Unit4Howlifebeganontheearth語(yǔ)言點(diǎn)市公開(kāi)課金獎(jiǎng)市賽課一等獎(jiǎng)?wù)n件

1、Unit 4 How Life Began on the Earth Language points第1頁(yè)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.仿寫：沒(méi)人明白他在說(shuō)什么，因?yàn)槟翘y了解了。 as在這里表示原因, 意思是“因?yàn)椤?As he was ill, he needed more help. 第2頁(yè)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：“以開(kāi)始”.2)to begin with =to start with 能夠單獨(dú)使用,表示“首先; 第一; 起初; 最初”.在句中作時(shí)間狀語(yǔ).e.g. To begin / start with, I couldnt understand him at all. 第3頁(yè) in all directions. =in every direction/directions? 朝四面八方譯：

3、The enemies ran away in all directions. 敵人四處逃竄。拓展： Im terrible with directions: _ a sense of direction: _ 在某人指導(dǎo)下: _ ones direction 方向感under我是路癡第4頁(yè)What it was to become was uncertain be to do be to do sth. be + doing:_ be + done:_聯(lián)想正在被動(dòng) (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頁(yè) (2)表示注定要All these things are to be answered for （償還）.（3）表示“將”、“計(jì)劃”、“安排”。(意思靠近于begoingto)如：. Thestudentsaretomeetattheschoolgatetomorrow. （4）應(yīng)該 shouldYou are t

5、o look after the little children第6頁(yè). be to do :You _this to the police.你應(yīng)該報(bào)警They _next month.他們計(jì)劃于下個(gè)月結(jié)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頁(yè)What it was to become was uncertain until 他昨天直到七點(diǎn)才離開(kāi)學(xué)校.He di

6、dnt leave school until seven oclock. 他們到了中國(guó)才能看了長(zhǎng)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 強(qiáng)調(diào)句It was not until seven oclock that he left school.第8頁(yè)【巧應(yīng)用】使大家驚奇是他竟沒(méi)有參加會(huì)議。_ _ _ _ _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引導(dǎo)主語(yǔ)從句，what在從句中作become賓語(yǔ)。第9頁(yè)1. _（使大家吃驚是）is that he didnt come to the meeting. What surprised everybody 2. _（他所做）added to our difficulty. What he did 第10頁(yè)4.The earth became so violent that it was not clear w

8、hether the solid shape would last or not. 地球開(kāi)始變得激烈動(dòng)蕩，不知道這個(gè)固體形狀是否會(huì)繼續(xù)下去。n. 固體 (solid, liquid, gas )adj. 固體, 堅(jiān)固, solid:第11頁(yè)cool down 變涼, 冷卻,平息，冷靜曬了一天太陽(yáng)之后,他喜歡在海水中涼快一下.After a day in the sun, he liked to _ in the sea.他話平息了她怒氣.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頁(yè) appear “出現(xiàn), 似乎”是不及物動(dòng)詞當(dāng)表示 “似乎, 好像”時(shí)是系動(dòng)詞, 該詞無(wú)被動(dòng)語(yǔ)態(tài)。 Our teacher appeared on TV this morning.第13頁(yè)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頁(yè)8.It was not immediately obvious that water was to be fundamental to the development of life. 水會(huì)對(duì)于生命發(fā)展起關(guān)鍵作用,這一點(diǎn)在當(dāng)初并不太顯著.第15頁(yè)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 對(duì)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頁(yè)過(guò)多二氧化碳對(duì)環(huán)境有害.Too much carbon dioxide is the environment.harmful to does harm to第17頁(yè)10.This produced a chain reaction, which made it possible for life to develop.chain reaction 連鎖反應(yīng)Ma

12、ke it possible for life to develop. 使生命發(fā)展成為可能 make it + adj./ n.+. to do sth. make / find / feel / think / consider that 從句第18頁(yè)組長(zhǎng)讓我們能夠一起合作.The group leader_老師讓他們輕易地明白那個(gè)問(wèn)題.The teacher _.made it possible for us to work together.made it easy for them to understand the question第19頁(yè)1) multiply v. 乘: 增加,繁

13、殖；7乘以4等于28.4 multiplied by 7 is twenty-eight.我們功課自上高中以來(lái)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頁(yè) all sorts of =all kinds of 各種各樣12. which encour

14、aged the later development of early shellfish and all sorts of fish.第21頁(yè)13.Others, called amphibians, were able to live on land as well as in the water. 另外一些叫作兩棲動(dòng)物,它們既能在活水里生存也能在陸地上生. 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.我學(xué)英語(yǔ)之外還學(xué)法語(yǔ).第22頁(yè)He grows flowers as well as

15、vegetables.他既種菜也種花.“就遠(yuǎn)標(biāo)準(zhǔn)”：He as well as I _ (like) rock music.likes第23頁(yè)15.They produced young generally by laying eggs.它們普通是經(jīng)過(guò)孵蛋而繁衍后代.lie, lie , lay 區(qū)分以下:動(dòng)詞原形第三人稱單數(shù)過(guò)去式過(guò)去分詞現(xiàn)在分詞漢字釋義 lielies撒謊;謊話 lie lies躺; 位于 laylays放置; 下蛋l(fā)iedliedlyinglaylainlyinglaidlaidlaying第24頁(yè)（1）vi. （消息等）傳開(kāi)，流傳。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頁(yè)（2）v. “使伸展，延伸，張開(kāi)”，常與out連用。He spreaded out his arms to welcome us.他張開(kāi)手臂歡迎我們。第26頁(yè)19.Thus they have, in their turn, become t

17、he most important animals on the planets thus adv. 所以；從而 She studied hard, _ .thus she got high marks2) In ones turn 輪到某人It will be _ to be on duty tomorrow.in Sams turn第27頁(yè)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,被動(dòng)語(yǔ)態(tài)中,他們中from都不可省。第28頁(yè)1) We must prevent them from making trouble. 2) You should prevent the child from injuring himself. 第29頁(yè)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 : 依賴，依靠depend on sb. 依靠,相信某人depend on sth. 取決與某物第30頁(yè)我們都靠你來(lái)做決定了Well all _to make a decision.明天是否能開(kāi)校運(yùn)會(huì)取決與天氣Whether to hold the sports meeting or not will _.depend on youdepend on the weather第31頁(yè)單詞拼寫 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 _ (精疲力盡). 8. There is a big underground railway _(系統(tǒng)) 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頁(yè).短語(yǔ)利用 in all directions,go by,give birth to,in t