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1、Section Warming Up & ReadingLanguage Points,速效提能演练,Unit 1,重点难点探究,Section ,重点难点探究,1However，according to a widely accepted theory，the universe began with a “Big Bang” that threw matter in all directions. 然而，一种普遍为人们所接受的理论是：宇宙起源于一次“大爆炸”，这次大爆炸将物质投射到四面八方。 品味经典 When the police arrived，the crowd ran away in
2、 all directions. 警察一到，人群就向四面八方跑开了。,自我探究 in all directions in every direction朝四面八方。 归纳拓展 (1)direction n方向；指导；(通常作复数)指示，命令，说明书 (2)a sense of direction方向感 in/from the direction of.朝着/来自方向 under the direction of sb.under ones direction 在某人的指导下 He has a good sense of direction. 他的方向感很好。,牛刀小试 完成句子 (1)汤姆朝一
3、个方向走，哈里则朝另一个方向走。 Tom went off _ and Harry _. 答案：in one direction；in another (2)他在我的指导下做这件事。 He did the work _. 答案：under my direction,(3)请遵照此药的使用说明。 _ the use of the medicine. 答案：Follow the directions for (4)我看到一个妇女在黑暗中正冲我跑来，我还未来得及认出她，她就从她来的方向跑回去了。 I saw a woman running toward me in the dark.Before I
4、 could recognize who she was，she had run back in the direction _. 答案：from which she had come,2They were in time to produce carbon，nitrogen，water vapour and other gases，which were to make the earths atmosphere. 最终产生了碳、氮气、水蒸气和其他多种气体，从而形成了地球的大气层。 品味经典 They caught the bus in time. 他们及时赶上了汽车。 The storm w
5、as in time to stop before the sports meeting. 暴雨终于在运动会开始前停了下来。 If you keep on，you will succeed in time. 如果坚持下去，你们总有一天会成功的。,自我探究 in time 及时；终于；迟早，总有一天。 归纳拓展 ahead of time 提前，提早 all the time 一直；始终 at a time 一次，每次；在时候 atno time 决不 at one time 一度；同时 at the same time 同时；尽管如此,at times 有时；偶尔 for the time b
6、eing 暂时 from time to time 不时地，间或 in no time 立即，立刻 on time 按时，准时 kill time 消遣；消磨时光 take ones time 不着急；慢慢来,牛刀小试 选用上述词组完成句子 (1)With five hungry children seated around the table，the food，disappeared _. (2)Its better to _ at this job than to hurry and make mistakes. (3)She would surely lose her place if
7、she were not _ for the meeting that day. 答案：(1)in no time (2)take your time (3)in time,3What many scientists believe is that the continued presence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas. 很多科学家相信，由于地球上长期有水的存在，使地球得以把有害气体和酸性物质溶解在海洋里。 品味经典 Your smoking c
8、an be harmful to the health of your children. 你吸烟会危及孩子的健康。 It is harmful to your heath to drink too much. 过量饮酒对你的身体有害。,自我探究 harmful adj. 有害的；造成伤害的。 归纳拓展 be harmful to sb./sth. 对某人/某物有害 harm n.& vt. 伤害，损害 do harm to 对有害,牛刀小试 完成句子 (2011年杭州高一检测改编)不要做任何对自然有害的事，否则我们人类就会过得不快乐。 Please dont _ our nature，or
9、we humans will _ each other. 答案：do anything harmful to；have no fun with,4These animals were different from all life forms in the past，because they gave birth to young baby animals and produced milk to feed them. 这些动物不同于以往所有的生命形式，因为它们能从体内生产出幼仔并给幼仔哺乳。 品味经典 Giving birth to a baby is a dreadful thing fo
10、r the poor. 生儿育女对于穷人来说是一件可怕的事情。 This event gave birth to peace movement. 这次事件引发了和平运动。,自我探究 give birth to(sb./sth.)产生；分娩。 牛刀小试 完成句子 (1)信不信由你，那位老妇人生了6个孩子，但没有一个活下来。 Believe it or not，the old lady _，but none survived. (2)对历史的研究孕育了社会科学。 _ the study of history_ the social sciences. 答案：(1)gave birth to 6 b
11、abies (2)It was；that gave birth to,5Thus they have，in their turn，become the most important animals on the planet. 于是，它们接着成为这个星球上最重要的动物。 品味经典 This week I am to do the housework in my turn. 这一周该我做家务了。 When it is in my turn，I am too excited to speak. 当轮到我时，我激动得都说不出话来了。,自我探究 in ones turn 轮到某人；接着。,归纳拓展 i
12、n turn 依次，轮流；反之，反过来 by turns 轮流；交替地 take turns to do sth. 轮流做某事 It is ones turn to do sth.轮到某人做某事,They answered the teachers questions in turn. 他们依次回答老师的问题。 We did the work by turns. 我们是轮流做这项工作的。 It is your turn to read the text. 该轮到你读课文了。 We take turns to do the housework. 我们轮流做家务。,牛刀小试 完成句子 (1)我们是
13、轮流做这项工作的。 We did the work _. (2)那些女孩儿逐一报出自己的名字。 The girls called out their names _. (3)然后，他们接着去营救困在大火中的人。 Then，they _ to save the people who were trapped in the big fire. 答案：(1)by turns (2)in turn (3)were in their turn,6They are putting too much carbon dioxide into the atmosphere，which prevents heat
14、 from escaping from the earth into space. 它们把过多的二氧化碳排放到大气层中，这使地球上的热不能释放到太空中去。 品味经典 We must prevent them from making trouble. 我们必须防止他们捣乱。 There was nothing to prevent her from doing so. 什么也不能阻止她这样做。,自我探究 prevent sb.from doing sth.使(某人)不做某事，阻止(某人)做某事，有时from可省略，而构成prevent sb.doing sth.结构。,归纳拓展 阻止某人做某事
15、prevent宾语(from) doing stop宾语(from) doing keep宾语from doing 注意：在主动语态中prevent与stop可省去from，而在被动语态里from均不可省去。keep sb./sth.from 中的from不能省略。,牛刀小试 完成句子 (1)下雨使我们不能踢足球了。 The rain _. (2)人们采取行动，防止了环境的恶化。 People took measures and this _. 答案：(1)prevented us from playing football (2)prevented the environment from
16、getting worse,7How life began on earth is one of the biggest puzzles that scientists found hard to solve. 地球上生命的起源是科学家们难以解决的最大疑惑之一。 品味经典 Its quite a puzzle to us why he did that. 他为何那样做，我们完全搞不懂。 The question puzzled them. 那个问题把他们难住了。,自我探究 puzzle n迷，难题，困惑 vt.& vi.(使)迷惑，(使)为难。 归纳拓展 be in a puzzle 感到困惑
17、 puzzle about/over 苦苦思考 puzzled adj.困惑的，迷惑不解的 puzzling adj.令人迷惑不解的,牛刀小试 完成句子 (1)她困惑的表情暗示了她正苦苦思考那个令人困惑的数学问题。 The _ look on her face suggested she was _ the _ math problem. 答案：puzzled；puzzling over；puzzling (2)(2011年长沙高一检测改编)那个男孩的失踪让警察很困惑。 The boys missing _. 答案：made the police puzzled,8What it was to
18、 become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe. 随后它会变成什么没人能知道，直到3845亿年前，这团尘埃才形成一个固体的球状物。,品味经典 As a young man he didnt know he was to win world fame later on. 年轻时，他不知道自己日后会举世闻名。 He was to regret that decision for the rest of his life. 他一定会为那
19、个决定后悔余生。 自我探究 此处“be不定式”结构表示注定会发生的事。,归纳拓展 “be不定式”结构还可以表示下列情形： (1)表示事先安排或计划要做的事； (2)表示“必须”，相当于should和ought to。,The new rule is to be carried out very soon. 这项新制度很快就要实行。 Mirror told me that she was to settle in China. 米拉告诉我她要在中国定居。 You are to wait here until I return. 你在这里等到我来。 The medicine is to be ta
20、ken three times a day after meals. 这种药饭后吃一天三次。,牛刀小试 翻译句子 (1)看电视之前你必须做作业。 _ (2)他注定要成为钢琴家。 _ 答案：(1)You are to do your homework before you watch TV. (2)He was to become a pianist.,9This produced a chain reaction，which made it possible for life to develop. 这就产生了一个连锁反应，使生命的发展成为可能。 品味经典 The heavy rain mad
21、e it impossible for us to arrive on time. 大雨使我们不可能准时到达。 Tina made it clear that she would leave the company. 蒂娜明确表示她将离开这家公司。,自我探究 在“make宾语宾补”结构中，当make的宾语是动词不定式或that引导的从句等时，常用it作形式宾语，而把真正的宾语后置。,归纳拓展 与make有类似用法的动词有consider，find，believe，imagine，feel，think等。,I consider it reasonable to tell her beforeha
22、nd. 我认为提前告诉她是有道理的。 I find it impossible to make some change. 我发现要做出改变是不可能的。 I think it no use quarrelling with him. 我认为和他争吵是没有用的。,牛刀小试 完成句子 (1)他很清楚地向我们表明他不想接那份工作。 He _ that _ take the job. (2)中国的迅速发展使学中文在全世界变得重要起来。 The rapid development of China _ across the world.,(3)我觉得我有责任帮助你。 I _ to help you. (4
23、)(2011年高考山东卷改编)这两个小女孩如此相像，以至于陌生人很难辨别出彼此。 The two girls are so alike that strangers _. 答案：(1)made it clear to us；he didnt want to (2)makes it important to study Chinese (3)felt it my duty (4)find it difficult to tell one from the other,译文助读 HOW LIFE BEGAN ON THE EARTH No one knows exactly how the ear
24、th began，as it happened so long ago.However，according to a widely accepted theory，the universe began with a “Big Bang” that threw matter in all directions.After that，atoms began to form and combine to create stars and other bodies.For several billion years after the “Big Bang”，the earth was still ju
25、st a cloud of dust.,What it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe.The earth became so violent that it was not clear whether the shape would last or not.It exploded loudly with fire and rock.They were in time to produce carbon
26、，nitrogen，water vapour and other gases, which were to make the earths atmosphere.What is even more important is that as the earth cooled down，water began to appear on its surface.,Water had also appeared on other planets like Mars but，unlike the earth，it had disappeared later.It was not immediately
27、obvious that water was to be fundamental to the development of life.What many scientists believe is that the continued presence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas.This produced a chain reaction，which made it possible for life to develop.,Many mill
28、ions of years later，the first extremely small plants began to appear on the surface of the water.They multiplied and filled the oceans and seas with oxygen，which encouraged the later development of early shellfish and all sorts of fish.Next，green plants began to grow on land.They were followed in ti
29、me by land animals.Some were insects.Others，called amphibians，were able to live on land as well as in the water.,Later when the plants grew into forests，reptiles appeared for the first time.They produced young generally by laying eggs.After that，some huge animals，called dinosaurs，developed.They laid
30、 eggs too and existed on the earth for more than 140 million years.However,65 million years ago the age of the dinosaurs ended.Why they suddenly disappeared still remains a mystery.This disappearance made possible the rise of mammals on the earth.,These animals were different from all life forms in
31、the past，because they gave birth to young baby animals and produced milk to feed them. Finally about 2.6 million years ago some small clever animals，now with hands and feet，appeared and spread all over the earth.Thus they have，in their turn，become the most important animals on the planet.But they ar
32、e not looking after the earth very well.,They are putting too much carbon dioxide into the atmosphere，which prevents heat from escaping from the earth into space.As a result of this，many scientists believe the earth may become too hot to live on.So whether life will continue on the earth for million
33、s of years to come will depend on whether this problem can be solved.,地球上生命的起源 没有人确切知道地球是怎样开始形成的，因为在很早很早以前它就形成了。然而，一种普遍为人们所接受的理论是：宇宙起源于一次大爆炸，这次大爆炸将物质投射到四面八方。然后，原子开始形成并结合成恒星和其他天体。 大爆炸后好几十亿年过去了，但地球还只是一团尘埃。随后它会变成什么没人能知道，直到3845亿年前，这团尘埃才慢慢地形成一个固体的球状物。,地球(开始)变得激烈动荡，不知道这个固体形状是否会继续存在下去。它(地球)猛烈的爆炸喷出了烈火与岩石，最终
34、产生了碳、氮气、水蒸气和其他多种气体，从而形成了地球的大气层。更为重要的是，地球冷却了下来，地球的表面就开始出现了水。 在火星这些其他行星上都出现了水，但和地球不同的是，这些水后来都消失了。水会对生命的发展起关键作用，这一点在当时并不明显。,很多科学家认为，由于地球上长期有水存在，它使得地球得以把有害气体和酸性物质溶解在海洋里。这就产生了一系列的反应，使得生命就有可能开始发展了。 好几百万年以后，水的表面开始出现了极小的植物。它们繁殖起来就使得海洋充满了氧气，这为早期的贝类及其他各种鱼类后来的进化创造了条件。接着，绿色植物开始出现在陆地上。随后，陆地上出现了动物，其中有一些是昆虫，另外一些叫两
35、栖动物，它们既能在陆上生活，也能在水里生存。,后来，当植物长大成了森林的时候，爬行动物出现了。它们一般是通过孵蛋而繁衍后代的。再后来一些叫做恐龙的巨型动物出现了。它们也生蛋，在地球上生存了一亿四千多万年。然而，六千五百万年前，恐龙时代结束了。它们为什么会突然灭绝至今仍是个谜。恐龙的灭绝使地球上哺乳动物的增多有了可能。哺乳动物不同于以往所有的生物形式，因为它们能从体内生产出幼仔并给幼仔哺乳。,最后，大约260万年前，一些小巧聪明、长着手脚的动物出现了，它们散布在地球的各个地方。于是，他们接着成为了这个行星上最重要的动物。然而，他们对地球却不怎么在意，他们把过多的二氧化碳释放到大气层中，这使得地球上的热不能释放到太空中去。因此许多科学家相信地球可能会因此变得太热而不适合生物的生存。所以，在未来的数百万年中，生命能否在地球上延续取决于这个问题能否得到解决。,速效提能演练,本部分内容讲解结束,点此进入课件目录,按ESC键退出全屏播放,谢谢使用,