人教新课标高中英语必修三《Unit 4 Period Two》课件
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1、Unit 4 Astronomy:the science of the stars,基础自测,内容索引,互动探究,达标检测,Period Two Warming Up & ReadingLanguage Points,基础自测,1. n.天文学 2. n.系统;体系;制度 3. n.学说;理论 4. n.原子 5. n.球体;地球仪;地球 6. n.大气层;气氛,一、词汇过关,基础词汇,astronomy,system,theory,atom,globe,atmosphere,7. vt.链子;连锁;锁链 8. vi.& vt.乘;增加 9. n.氧 10. adv.因此;于是,chain,m
2、ultiply,oxygen,thus,1. adj.猛烈的;激烈的;强暴的 n.猛烈;激烈 2. prep.与不同;不像 prep.像 3. adj.有害的 n.& v.损害;危害 adj.无害的 4. vi.存在;生存existence n.生存;存在 5. n.谜;难题;vt.& vi.(使)迷惑;(使)为难 adj.令人迷惑的 adj.感到迷惑的,拓展词汇,violent,violence,unlike,like,harmful,harm,harmless,exist,puzzle,puzzling,puzzled,1.构词法 (1)规则harm (n.& v.损害) harmful
3、(adj.有害的) harmless (adj.无害的) 联想careful小心的;careless粗心的 hopeful有希望的;hopeless无希望的 helpful有帮助的;helpless无助的 useful有用的;useless无用的 (2)规则like (prep.像) unlike (prep.不像) 联想unusual不寻常的 unable不能够的 unfair不公平的 unfit不健康的 unhappy不高兴的,联想归纳,2.话题词汇与“学科”有关的词汇 (1)astronomy n.天文学 (2)biology n.生物学 (3)history n.历史学 (4)geog
4、raphy n.地理学 (5)chemistry n.化学 (6)physics n.物理学 (7)politics n.政治学 (8)mathematics n.数学 (9)Chinese n.语文,1. 及时;终于 2. 下蛋 3. 产生;分娩 4. 轮到某人 5. 阻止;制止,二、短语互译,汉译英,in time,lay eggs,give birth to,in ones turn,prevent.from,英译汉,1.begin with _ 2.in all directions _ 3.as well as _ 4.as a result of _ 5.depend on/upo
5、n _,从开始;起源于,朝四面八方,也;还;和一样好,由于结果,取决于;依靠,教材原句 1.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. 随后它会变成什么没人能知道,直到3845亿年前,这团尘埃才慢慢形成了一个固体的球状物。 分析解读 be to do sth. 表示按计划、安排、决定、命令要做的事或注定要发生的事。 仿写运用 The experience is . 这次经历注定会改变她的一生。,三
6、、重点句式,to change her whole life,教材原句 2.This 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。 分析解读 “make宾语宾补”复合结构。 仿写运用 It was your help that . 正是你的帮助才使我有可能通过了考试。,made it possible for me to pass the exam,互动探究,They were in time to produce carbon dioxide,nitr
7、ogen,water vapour and other gases,which were to make the earths atmosphere. 它们最终产生了二氧化碳、氮气、水蒸气和其他多种气体,从而形成了地球的大气层。,重点词汇,in time及时;终于;迟早 in time for sth. /to do sth. 来得及(做);及时(做) in no time立即,立刻 at a time依次;逐一;每次 at no time在任何时候都不;决不(置于句首时,主句使用部分倒装) at one time曾经,一度 at times有时,偶尔 on time按时,准时,(1)Do y
8、ou want to get up in time to have breakfast with your family?你想及时起床和家人一起吃早饭吗?(2017全国) (2)At no time should you give up studying. 在任何时候你都不应该放弃学习。 (3)He rushed out of the kitchen no time when he heard the shout. 他听到喊声立刻从厨房里冲了出去。 (4)Everyone may make mistakes . 每个人都会偶尔犯错误。,in,at times,(5)These buses ar
9、e never time and the passengers are always complaining. 这些公共汽车从来不准时,乘客们一直在抱怨。 单句改错 (6)You cant imagine this lake used to be a beautiful place in our city at a time.,on,one,Water had also appeared on other planets like Mars but,unlike the earth,it had disappeared later. 在其他行星比如火星上也都出现了水,但和地球不同的是,这些水后
10、来都消失了。,(1)unlike prep.与不同;不像;adj.不同的,不相似的 (2)unlikely adj.不大可能的 (3)likely adj.可能的 be likely to do sth. 可能做某事 It is likely that.有可能,(1)But unlike her school friends,16-year-old Sarah is not spending half-term resting. 但是和她学校里的朋友不同,16岁的Sarah没有花半学期的时间来休息。 (2017全国) (2)This is unlikely to be the whole st
11、ory.情况可能并非完全如此。 (3) he will be in Beijing this autumn. 今年秋天他可能在北京。 句型转换 (4)Its likely that he will attend the meeting. He the meeting.,It is likely that,is likely to attend,It was not immediately obvious that water was to be fundamental to the development of life. 水对生命的发展会起关键作用,这一点在当时并不明显。,fundament
12、al adj.基本的;基础的;根本的 be fundamental to sth. 对是必不可少/至关重要,(1)There is a fundamental difference between the two points of view. 这两个观点有一个根本区别。 (2)A knowledge of Chinese is fundamental any understanding of this problem. 汉语知识对于理解这个问题是必不可少的。,to,What many scientists believe is that the continued presence of w
13、ater 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存在,使地球得以把有害气体和酸性物质溶解在海洋里。,(1)harmful adj.有害的 be harmful to对有害 (2)harmless adj.无害的;不致伤害的 (3)harm n.& v.损害;危害 do sb. harm/do harm to sb. 对某人有害 There is no harm (in) doing sth. 做某事无害处。,(1)It is harmful
14、 to your eyes to read in the sun. 在阳光下看书对你的眼睛有害。 (2)As a matter of fact,this plant is harmless to humans. 事实上,这种植物对人类无害。 (3) giving up smoking. 戒烟没有害处。,There is no harm (in),一句多译 (4)喝酒太多对你的健康伤害很大。 Drinking too much your health.(harm) Drinking too much your health.(harmful),does harm to,is harmful to
15、,They laid eggs too and existed on the earth for more than 140 million years. 它们也下蛋,并且在地球上生存了一亿四千多万年。,(1)exist vi.存在;生存 exist on靠生活/生存 exist in存在于中 There exist(s)/existed.某地有;存在 (2)existence n.存在;生存 come into existence(begin to exist)产生;成立 in existence现存的,存在的,(1)Jet airplanes and big trucks didnt ex
16、ist yet. 喷气式飞机和大卡车还不存在。 (2)To be honest,I can hardly exist on the wage Im getting. 说实话,我依靠工资几乎活不下去。 (3)Sudan came into (exist) at the end of the 1800s. 苏丹国于19世纪末开始成立。 (4)The bridge is the oldest . 这座桥是现存最古老的。,existence,in existence,These animals were different from all life forms in the past,because
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