抓基础,必修三 Unit 4 Astronomy: the science of the stars,析考点,提能力,.高频单词必记,1 n 系统；体系；制度 2 n. 学说；理论 3 n. 大气层；气氛 4 adj. 基本的；基础的 5 adv. 因此；于是,system,theory,atmosphere,fundamental,thus,6 vt.& vi. (使)迷惑；(使)为难 n. 谜；难题 7 adj. 温和的；文雅的 8 vi.& vt. 碰撞；坠落 9 n&vt. 拉(力)；拖；牵引力 10 vi.& vt. (使)浮动；(使)漂浮 n. 漂浮物,puzzle,gentle,crash,pull,float,11 adj.猛烈的；激烈的；强暴的 n暴力 adv.暴力地；猛烈地 12 prep.不同；不像 vt.喜欢；prep.相像的 adj.可能的 13 adj.有害的 n&v.伤害 adj. 无害的 14 vi.存在；生存 n存在；生存,violent,violence,violently,unlike,like,likely,harmful,harm,harmless,exist,existence,.重点短语必背,1 及时；终于 2 下蛋 3 产生；分娩 4 轮到某人；接着 5 阻止；制止,in time,lay eggs,give birth to,in ones turn,prevent .from,6 感到高兴；感到振奋 7 既然 8 突发；爆发 9 密切注视；当心；提防 10 挡住(光线),cheer up,now that,break out,watch out,block out,.经典句型必会,1What is even more important is that as the earth cooled down, water began to appear on its surface. 更为重要的是，当地球冷却下来时水开始在地球表面出现了。,解读：what 引导主语从句。 仿写：当在太空旅行的时候，人类一定害怕的是来自太阳的辐射。 _when traveling in space is radiation from the sun.,答案：What man must fear,2The earth became so violent that it was not clear whether the shape would last or not. 地球变得如此激烈动荡以致于不知道这个固体形状是否会继续存在下去。,解读：whether .or not “是否”。 仿写：经理还没有决定是否派我去国外。 The manager didnt decide _.,答案：whether I would be sent abroad or not,3But 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。,解读：“twice as形容词原级as”是倍数表达法之一。 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.,答案：twice as large as,4This 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。,解读：句中的it是形式宾语，真正的宾语是不定式短语to develop。 仿写：她的知识让她能够获得这个机会成为可能。 Her knowledge _ the chance.,答案：made it possible for her to have,5“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。”,解读：now that “由于；既然”，引导原因状语从句，有时that可以省略。 仿写：既然大家都在，她不妨把想法都说出来。 _ they were all there she might as well speak her mind.,答案：Now that,1harmful adj.有害的，其反义词为harmless,(3)There is no harm in doing sth./It does no harm to do sth.做某事是个好主意(或没有坏处),教材P26原句 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. 很多科学家相信，由于地球上长期有水存在，它使得地球得以把曾经存在于大气层中的有害气体和酸性物质溶解在海洋里。 Its harmful to your eyes to read in the sun. 在阳光下看书对你的眼睛有害。,The medicine is to children but does no adults. 这种药对儿童有害，却对成年人没有什么害处。 As far as Im concerned, making an apology to him first. 就我个人而言，先向他道歉没有什么坏处。,harmful,harm to,there is no harm in,2exist vi.存在；生存,教材P26原句 They laid eggs too and existed on the earth for more than 140 million years. 它们也生蛋，在地球上存在了一亿四千多年。 There existed a close relationship between families and their milkmen. (摘自2011全国卷阅读理解A) 各家各户和他们的送奶人之间存在一种亲密的关系。,The custom of arranged marriages still many parts of China. 包办婚姻的风俗在中国很多地区仍然存在。 They are paid hardly enough to exist on. 他们收入微薄，几乎无法维持生活。,exists in,As is known to us, China as an independent country in 1949. 众所周知，在1949年中国以一个独立的国家存在了。,came into existence,3puzzle vt.使迷惑；使为难；使窘困；感到迷惑n.( 游戏的)猜谜；难题；谜,教材P27原句 How life began on earth is one of the biggest puzzles that scientists found hard to solve. 地球生命如何起源是科学家们觉得很难解决的最大的难题之一。 What puzzles me is why they didnt show up. 令我百思不解的是他们为什么没有出现。,Ive been trying to why shes so upset. 我一直想试图搞清楚她为什么如此烦恼。 When you said you were in law school, I was more puzzled.(摘自2011天津高考完形填空) 当你说你正在学校学法律时，我感到更加困惑了。,puzzle out,Her look on her face suggested she didnt understand what I said. 她脸上迷惑的表情表明她不明白我说的话。,puzzled,4pull n&vt.拉(力)；拖；牵引力,教材P30原句 As the rocket rose into the air, we were pushed back into our seats because we were trying to escape the pull of the earths gravity. 随着火箭的升空，由于我们在努力挣脱地球的引力，我们被向后推在座位上。 They are pulling down those houses to make room for a new hotel. 为了给新旅馆腾地，他们正在拆除那些房屋。,We waved as the train . 火车驶出车站时我们挥手告别。 The police car signalled to us to . 警车发出信号，要我们驶向路边停靠。,pulled out of the station,pull in,.单词拼写 1I agree with you in _ (理论) but practically I dont think we have the time to do that.,答案：theory,2I dont think the film is suitable for students because its full of _ (暴力的) crimes.,答案：violent,3The organization may soon stop to _ (存在) if more funding isnt provided.,答案：exist,4Thou