1、新课标人教版课件系列,高中英语必修3-4.14,Unit 4,Reading,Astronomy:the science of the stars,What was there on the earth before life began? Why does scientist think there has never been life on the moon? Why do animals first appear in the sea? Why do green plants help life to develop? Why were mammals different from o
2、ther animals?,We are going to learn a passage about how life began on the earth. Now read the text quickly with the following questions.,READING,Now please listen to the recording of the text. Pay attention to the pronunciation of each word and the pauses within each sentence and try to find out the
3、 characteristics of the whole passage.,Next you are to read and underline all the useful expressions or collocations in the passage. Copy them to your notebook after class as homework. Get the main idea of each paragraph.,Read the passage quickly and find out the answers to the questions below.,1. W
4、hats the main idea of the text? 2. The topic sentence of each paragraph? 3. How many parts can the text be divided into? 4. Whats the main idea for each part?,Scanning,1. Whats the main idea of the text?,How life began on the earth.,The development of living things.,2. Topic sentences: After the “Bi
5、g Bang”, the earth was just a cloud of energetic dust. What scientists think that the different because of the arrival of small plants growing in the water on its surface. Many millions of years later the first green plants began to appear on land Small clever animals, now with hands and feet, appea
6、red and spread all over the earth.,How many parts can the text be divided into?,Three parts: Part 1 (para 1)Part 2 (para2.3.)Part 3(para4),Water made it possible for life begin to develop.,The development of life.,The development of people.,Energetic dust,a ball,slowly combine,the earth cooled down,
7、it exploded and produced kinds of gases,water,the earths atmosphere,Big Bang,Read Para 1. and find out how the earth came out,Fill in the blanks with the proper words:,After the _,the earth was a cloud of _. Later the dust began to_ Into_. And then it _ loudly with fire and rock,which were in time t
8、o _ the water vapour,carbon dioxide, which were to make the earths _.As the earth _ down,_ began to _ on its surface. Water had _ from planets or satellites,but it _on the earth.That made it possible for life to begin to _.,energetic dust,combine,exploded,produce,cooled,appear,disappeared,stayed,dev
9、elop,“Big Bang”,a ball,atmosphere,water,Read part 2 very carefully, and fill out the chart: How life began on earth,water,1.,2.,3.,4. insects (on land) 5.,6.,7. 8. dinosaurs (on land) 9,small plants in water,shellfish and allsorts of fish,green plants on land,amphibians(on land and in water),forests
10、,reptiles(on land),mammals(on land),Fill in the blanks with the proper verbs:,The arrival of _ encouraged the _of early _. Many millions of years later _ began to appear_. Later _ appeared. Some were_. Others called _,were able to live on lands well as _. When the plants grew into forests, _appeared
11、 for the first time. After they disappeared,_became more important. They were the last group of animals different from because they _from within their bodies.,development,shellfish and all sorts of fish,on land,land animals,amphibians,dinosaurs,mammals,produced,small plants,the fist green plants,ins
12、ects,in the sea,Intensive reading,1.Why was the earth different from other planets ?,A. It produced a lot of heat. B. The water remained.C. Water disappeared. D. It was the oldest planet.,2. Why was life able to develop on the earth but not on other planets ?,A. The earth had a solid shape.B. The ea
13、rth was not too hot and not too cold.C. The earth didnt have harmful gases in itsatmosphere . D. The water stayed on the earth but not onother planets.,3. Why was it necessary for plants to grow before animals ?,A. Animals needed plants to protect them from the sun.B. Animals could hide from hunters
14、 in forests.C. It was easier for plants to grow.D. Plants provided oxygen for animals to breathe.,4. What problem is caused by human beings ?,A. They cause global warming.B. They exist everywhere on the earth.C. They find new methods of growing crops.D. They enjoy hunting and fishing.,Put the order
15、of development of life into a time line. insects and amphibians appear a solid ball reptiles appear a cloud of dust shellfish and other fish appear dinosaurs appear small plants grow on the water plants begin to grow on dry land presence of water mammals (including humans )appear,D,B,I,G,E,H,A,C,F,J
16、,Post-reading,Why is it wrong in films and stories to show dinosaurs and people together?2. Why do you think that humans are the cleverestanimals on the earth?,Dinosaurs died out long before human beingsdeveloped on the earth.,They are the cleverest animals because they havelarger brains than any ot
17、her creatures on theearth so far.,It exploded loudly with fire and rock, which were in time to produce the water vapour,.,in time (for sth/to do sth): not late 及时；不迟 She will be back in time to prepare dinner. 她来得及回来准备晚饭。,in time: sooner or later; eventually 迟早；最后 Ill see him in time. 总有一天我会遇见他。,Wor
18、d Study,in/out of time: in/not in the correct time 合/不合节拍,(sth) be to (do): (something) will definitely happen, or it must happen 不可避免要发生或必须发生。e.g.They said goodbye, little knowing that they were never to meet again. She is to be honoured for this great work. Mr. Clark said to his daughter, “You are
19、 to be home by 10 oclock at the latest.”,The audience clapped in time to the music.,观众合着音乐的节拍拍手。,(sb/sth) be different from: not like someone or something else in one or more ways 与不同。,2. Nobody knew that it was going to be different from other planets going round the sun.,City life is quite differe
20、nt form country life. 都市生活与乡村生活是非常不同的。,注意:（1）强调different时用very, much, quite, entirely, totally等词。（2）有时，美语口语中用than,英语口语中用to来代替from。,going round the sun为现在分词短语，做定语，表示一般的动作。例如：,Men breaking the law will be punished. Men who break the law will be punished.,现在分词短语作定语，也可表示进行的动作。例如：,Can you see the girl da
21、ncing with your boyfriend? Can you see the girl who is dancing with her boyfriend?,你能看到与男友跳舞的那个姑娘吗？,3.This encouraged the development of early shellfish and all sorts of fish. 这为早期贝类及其他各种鱼类的发育进一步创造了条件。,名词后缀-ment加在动词之后表示： (1)行为，例如：argument, betterment, development, treatment。 (2)结果，例如：arrangement, se
22、ttlement, statement. (3)工具，例如：instrument, pavement.,4. It allowed the earth do dissolve harmful gases, which had become part of the earths atmosphere, into the oceans and seas.,allow vt. 允许、许可、容许 allow+n./pron./doing allow sb. to do be allowed to do,My father doesnt allow smoking at home. In fact he
23、 doesnt allow us to smoke anywhere at any time.,父亲不允许在家里吸烟。实际上，他不允许我们在任何地方任何时候吸烟。,Are we allowed to use the computer?,我们可以用电脑么？,5.This encouraged the development of early shellfish and all sorts of fish.,encourage 鼓舞；促进；怂恿。后接名词、代词，也可接不定式作宾语补足语。如：,High prices for corn and wheat will encourage farming
24、.,玉米和小麦的高价将促进农业的发展。,My success encouraged me to continue.,我的成功鼓励我继续干下去。,He encouraged me to learn dancing.,他鼓励我去学跳舞。,6. Whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved.,for millions of years to come中不定式to come作定语，与前面的名词之间有逻辑上的主谓
25、关系：,She is the last person to do such a thing. 她是最不像会做这种事的人。,(sth) depend on (sth else): something might only happen or be true if the circumstances are right for it 取决于。,Our success depends on whether everyone works hard or not.,我们的成败取决于是否每个人都努力工作。,7. spread的用法 （1）vi. （消息等）传开，流传。如：,The news spread
26、through the school very quickly. The fire spread from the factory to the house nearby.,He spread out his arms to welcome us.,（2）vt. “使伸展，延伸，张开”，常与out连用。如：,I spread a new cloth on the table.,我在餐桌上铺上一条新桌布。,他张开手臂欢迎我们。,Some scientists havefound that there is water on Mars.1. Can Mars become a little Earth?2. Then what arenecessary factors?,Discussion:,Homework,(1) Retell the passage. (2) Remember importantlanguage points.,
