Unit 4 Astronomy: the science of the stars using language 课件（26张）

课件26张PPT。 Unit 4　
Astronomy：the science of the starsDonghu Senior High School
Zhengwei
Teaching objectivesFirstly, we know how to use words, phrases and sentence structures in a particular situation.
Secondly, we know where NMET is going.
Last but most importantly, we have fun learning English.
1．___________(n.)　 天文学
2．___________(n.) 系统；体系；制度
3．___________(n.) 学说；理论
4．___________(n.) 大气层；气氛
5．___________(adj.) 基本的；基础的
6．___________(adv.) 因此；于是
7．___________(vt.& vi.) (使)迷惑;(使)为难 (n.) 谜；难题
8．___________(adj.) 温和的；文雅的
9．___________(vi.& vt.) 碰撞；坠落
10．___________(n.& vt.) 拉(力)；拖；牵引力astronomy
system
theory
atmosphere
fundamental
thus
puzzle
gentle
crash
pull11．___________(vi.& vt.) (使)浮动；(使)漂浮(n.) 漂浮物
12．___________(adj.) 猛烈的；激烈的；强暴的
___________(n.) 暴力
___________(adv.) 暴力地；猛烈地
13．___________(prep.) 不同；不像
___________(vt.) 喜欢；(prep.)相像的
___________(adj.) 可能的
14. ___________(adj.) 有害的
___________(n.& v.) 伤害
___________ (adj.) 无害的
15．___________(vi.) 存在；生存
___________ (n.) 存在；生存float
violent
violence
violently
unlike
like
likely
harmful
harm
harmless
exist
existence结束放映返回导航页1．_________________阻止……
2．_________________ 产生；分娩
3．_________________ 轮到某人；接着
4．_________________ 熟悉；掌握；理解
5．_________________ 密切注视；当心；提防
6．depend on _________________
7．in time _________________
8．lay eggs _________________
9．cheer up _________________
10．now that _________________
11．break out _________________prevent...from...　
give birth to
in one’s turn
get the hang of
watch out 依靠；取决于
及时；终于
下蛋
感到高兴（振奋）
既然
爆发 1．Whether life will continue on the earth for millions of years to come will depend on whether this probelom can be solved.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。名师指津：第一个whether引导主语从句，第二个whether引导宾语从句作介词on的宾语，whether不作成分 。例句仿写：下周六我们能否在户外开英语晚会取决于天是否下雨。
_______________________________in the open air next Sunday depends on whether it rains or not.Whether we will hold an English party结束放映返回导航页2．But when I tried to step forward，I found I was carried twice as far as on the earth and fell over.而当我试着向前迈步的时候，我发觉我被送出去很远，步子的跨度竟是在地球上的两倍，因而我摔倒了。名师指津：“twice as＋形容词原级＋as”是倍数表达法之一。例句仿写：仔细研究地图后，我发现这个村庄是那个村庄的两倍大。
　　I find this village is __________________ that one after studying the map carefully.twice as large as结束放映返回导航页3．This produced a chain reaction，which made it possible for life to develop.这就产生了一系列的反应，使得生命就有可能开始发展了。名师指津：which引导非限制性定语从句，句中的it是形式宾语，真正的宾语是不定式短语to develop。例句仿写：太阳让地球变暖，这使得植物生长有了可能。
　　
The sun heats the earth, which_____________________
__________________. makes it possible for结束放映返回导航页plants to grow4．“Oh，dear，” I cried，“walking does need a bit of practice now that gravity has changed.”“天哪，”我大声说。“重力改变了，看来走路也的确需要练一练了。”名师指津：now that“由于；既然”，引导原因状语从句.例句仿写：你既然得到了一个机会，不妨充分利用它。
　__________________________，you might as well make full use of it.　Now that you’ve got a chance结束放映返回导航页※exist in
存在于……之中
※exist on...
靠……为生
※there exists...
某地有……；存在……　　vi.存在，生存※come into existence
开始存在
※in existence
存在结束放映返回导航页感悟：考什么①(2013·淄博模拟)There________(exist) a certain doubt among the workers as to the necessity of the work.
②(牛津P697)They can’t exist _____ the money he’s earning.
③Scientists have many theories about how the universe first came into__________. (exist)
existsonexistencepuzzle vt.使迷惑;使为难;使窘困;n.(游戏的)猜谜;难题；结束放映返回导航页puzzle about/over sth.　仔细琢磨a puzzle to sb
让某人费解感悟：考什么①(2014福建高考阅读A)Tenyson’s care for the elderly woman___________(puzzle) the flower seller.
②The police are still puzzling__________ how the accident could have happened.
③where the missing plane has gone remains a puzzle ____ us.
about/overtopuzzled(教材原句)Thus they have,in their turn, become the most important animals on this planet.
in 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 one’s turn to do sth.
　　轮到某人做某事
It turns/turned out that...　　
结果… 　　轮到某人；接着结束放映返回导航页感悟：考什么①((2013·四级英语)Stressful environments lead to unhealthy behaviors such as poor eating habits，which ___ turn increase the risk of heart disease.
②I think it’s my turn _______(drive) the kids to school.
③It turned ______ that this young man was none other than the old man’s son
to driveoutinBut when I tried to step forward，I found I was carried twice as far as on the earth and fell over.　
而当我试着向前迈步的时候,我发觉我被送出去很远,步子的跨度竟是在地球上的两倍,因而我摔倒了。twice as＋形容词原级＋as”是倍数表达法之一结束放映返回导航页Just do it yourself! No one knows exactly how the earth began. However, according to a widely accepted theory, it began with a “Big Bang”. Then the earth exploded loudly and produced water vapor and many gases, which were to make the earth’s atmosphere. And then as the earth cooled down, water began to appear on the surface.
It was the presence of water that allowed the earth to dissolve harmful gases and acids into the oceans and seas, which made it possible for life to develop. And the appearance of small plants encouraged the development of early shellfish and all sorts of fish. Next, green plants began to grow on land. They were followed by land animals. Later, reptiles appeared for the first time, after which dinosaurs developed.
However, they suddenly disappeared. Therefore, mammals rose on the earth. Finally, humans appeared and spread all over the earth. However, they are putting too much carbon dioxide into the atmosphere, making the earth too hot to live on. So whether life will continue on the earth will depend entirely on whether this problem can be solved.
语法填空解题技巧 一、语篇型语法填空的形式
在一篇200词左右的语篇（短文或对话）中留出10处空白，部分空白的后面给出单词的基本形式，要求考生根据上下文填写空白处所需的内容，所填写词语不得超过三个。
二、语篇型语法填空的测试点
主要包括动词时态、语态、情态动词、非谓语动词、名词、形容词、副词、连词、冠词、代词、介词、复合句、强调句、感叹句、倒装句、反意疑问句、省略句、定于从句的连接词和it的用法等。My sample No one knows exactly how the earth began. However, according to a widely accepted theory, it began with a “Big Bang”. Then the earth exploded loudly and produced water vapor and many______(gas), which were to make the earth’s atmosphere. And then as the earth cooled down, water began to appear on the surface.
It was the presence of water ____ allowed the earth to dissolve _________(harm) gases and acids into the oceans and seas, which made it possible for life to develop. And the appearance of small plants encouraged the development of early shellfish and all sorts of fish. Next, green plants began to grow on land. They were followed (follow)by land animals. Later, reptiles appeared for the first time, after which dinosaurs developed.
gasesharmfulthat However, they suddenly disappeared. Therefore, mammals rose on the earth. Finally, humans appeared and spread (spread) all over the earth. However, they are putting too much carbon dioxide into the atmosphere, making (make)the earth too hot to live on. So whether life will continue on the earth will depend entirely on whether this problem can be solved.
◇ 写作素材 ◇结束放映返回导航页◇连句成篇◇ The earth is six times the size of Mars.
Whether we can land on Mars depends on the development of science and technology.
There is almost no oxygen on Mars， which makes it impossible for life to exist.
　 Now that Mars is quite different from our earth，if we are to go to Mars one day，we should have to take along our own oxygen，food，clothing and a tent.结束放映返回导航页