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1、,水星、金星、地球、火星、木星、土星、天王星、海王星,Water Air Life,Water is the headspring of life. 水是生命之源,?,A cloud of dust Combine into a solid ball Explodewith fire & rock (produce H2O, CO2,O2, N2, other gases),atmosphere,Cool down,water appeared,dissolve harmful gases into ,Life began,Life developed,A cloud of dust a so
2、lid ball presence of water on the water shellfish & other fish plants begin to grow on dry land insects and amphibians appear retiles appear dinosaurs appear mammals appear,The development of life,insects and amphibians appear,retiles appear,dinosaurs appear,mammals appear,Discussion： How to protect
3、 the earth and make it a better place to live on?,主语从句可以前置，也可以后置。用it做形式主语，而把主语从句放在句末，常用下面几种句型。,1）It + be + 表语 +主语从句 表语：（名词， 形容词，过去分词）,It is certain that she will do well in her exam. It is true that I told her everything.,It is a pity that we cant go. It is no surprise that our team should have won
4、the game. It is an honour that I was invited to attend the meeting.,It is said that Mr. Green has arrived in Beijing. It is reported that China has sent another manmade earth satellite into orbit.,2）It+不及物动词或短语+主语从句 It seemed (happened, doesnt matter, has turned out) that,It happens that they were a
5、bsent. It seems that Alice is not coming to the party at all.,It doesnt matter whether she will come or not. It makes no difference where we shall have the meeting.,3) It +及物动词（被动语态）+主语从句,It has been decided that the exhibition will not open on Sundays.,注意:,1）主语从句在句首时，必须由连接词引导，不能省略这些连接词；但是如果用it做形式主语
6、，而把主语从句放在句末时，从属连词that可以省略。,误：They should like each other is natural. 正：That they should like each other is natural. 正：It is natural that they should likeeach other.,2)如果主语从句放在句首，不能用if引导，但是如果用it 做形式主语，而把主语从句放在句末时，也可以用if引导.,误：If Mary really heard him is really doubtful. 正：It was doubtful if Mary reall
7、y heard him.,1. What it was to become was a mystery until the dust began to slowly combine into a ball moving around the sun.,_ （使大家吃惊的是）is that he didnt come to the meeting.,What surprised everybody,2. _（他所做的） added to ourdifficulty.,What he did,n. 固体 solid, liquid, gas adj. 固体的；实心的,无空隙的；结实的，坚固的,1)
8、 Matter has three states: solid, liquid液体 and gas气体.,2) When water freezes结冰, it becomes solid and we call it ice.,be to (do): 不可避免要发生或必须发生,They are to go traveling in August.Mr. Clark said to his daughter, “You are to be home by 10 oclock at the latest.”,3.It exploded loudly with fire and rock, whi
9、ch were in time to produce the water vapour, ,1). （使某物）炸开，爆炸,2). （指感情）激发,3). （指人口）突然或迅速增加,The firework exploded in his hand and he was hurt seriously.,I was frightened when she exploded into loud laughter.,Now it is not easy to find jobs with the exploding population.,explosion n. 爆炸（声）,explosive ad
10、j.爆炸性的，易爆炸的 n.炸药，爆炸物,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。,in/out of time: in/not in the correct time 合/不合节拍 The audience clapped in time to the music. 观众合着音乐的节拍拍手
11、。,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 dancing 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？,be harmful to 对有害,do harm to
12、sb. = do sb. harm 伤害某人，对某人有害处,1) Pollution is especially harmful to animals.,2) Smoking will do you a lot of harm.,8. They multiplied and filled the first oceans and seas with oxygen .,multiply (数目上)增加，增多；乘；（使）繁殖,1) Our problems have multiplied since last year.,2) 2 and 5 multiply to make 10.,4) The
13、 plants here multiply rapidly.,3) 6 multiplied by 5 is 30.,= Multiply 6 by 5 to make 30.,10. Many millions of years later the first green plants began to appear on land.,late,adj. 迟到的，晚的；前任的；以前的；已故的,later,adv. 后来，较晚时候,过后 adj. late的比较级(更迟的,更后的),latest,adj. 最新的,lately,adv. =recently 近来,1) Mr. Zhu Rong
14、ji is the late Prime Minister of China.,3) She said she would ring you later this morning.,5) Its only lately that she has been well enough to go out.,2) He is often late for school.,4) Have you heard about the latest news?,12. They produced young generally by laying eggs.,Its generally believed tha
15、t一般认为,generally speaking 一般而言，概括来说,1) Its generally believed that girls work harder than boys do.,2) Generally speaking, women cry more easily than men.,13. Small clever animals, now with hands and feet, appeared and spread all over the earth.,vi.,散布, 传播，蔓延, 伸展，扩展,vt.,铺开，摊开,1) The news spread throug
16、h the school very quickly.2) Theres a desert spreading for hundreds of miles.,3) He spread out his arms to welcome us.4) I spread a new cloth on the table.,14. They are putting too much carbon dioxide into the atmosphere, which prevents heat from escaping from the earth into space.,阻止某人做某事 :,prevent sb. (from) doing sth.,
