人教版高一英语必修3 UNIT4知识点总结精品.docx

1、人教版高一英语必修3 UNIT4知识点总结精品UNIT 4 Astronomy: the science of the starsWordssolar system planet circle astronomy origin religion widely theory universe atoms billion dust solidglobe violent explode carbon vapor nitrogenproduce atmosphere appear surface unlike obvious fundamental presence dissolve harmful

2、acids chain reaction extremely multiplied oxygen encourage development shellfish insect amphibians reptiles huge dinosaurs exist rise mammal spread thus dioxide removepuzzle presence chemistry planet gravity evidence satellite violent shocked gentle rude biology provediscovery physicist supply decre

3、ase species extinct climate concern disappear spaceship force escapepull lessen float weight painful frightening amazed increase exhausting structure theory situation crash Phrases:in all directions combine to settle into in time cool down fill.with as well as lay eggs remain a mystery give birth to

4、in ones turn prevent.from as a result of depend on no longerdie out block out crash into dozens of fall back to cheer up twice as far as fall over now that get the hang of step forward break out pay attention to watch out be make up of be fundamental to begin with in all directions according to watc

5、h out for 密切注意；当心；提防Grammar: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. (随后）它变成什么没人知道，知道3845亿年前，这团尘埃才慢慢地形成一个固体的球状物。be to do1)“将要做某事”指预先安排好的计划或约定2)表示义务、命令、禁止或可能性等，意思接近于should,must,have to3)表示将来必然要发生的事，意为“注定.”(2010全国高考)The disco

6、very of gold in Australia led thousands to believe that a fortune_ A.is made B.would make C.was to be made D.had made2. The earth become so violent that it was not clear whether the shape would last or not. 地球变得激烈动荡，不知道这个固体形状是否会继续存在下去。句法分析：本句是So.that.句型，that引导的结果状语从句中又包含一个主语从句，其中it是形式主语，whether the

7、shape would last or not 是真正的主语。violent:adj.暴力的；强暴的；猛烈的；激烈的拓展：a violent crime / behavior 暴力犯罪/行为a violent storm 暴风骤雨do violent to.对.施暴；歪曲（事实）take .by violence 抢夺with violence 强烈地，强有力地；用暴力3.They were in time to produce carbon dioxide, nitrogen,water vapor and other gases,which were to make the earths

8、atmosphere.最终产生二氧化碳、氮气、水蒸气和其他气体，从而形成了地球的大气层。句法分析：which 引导非限制性定语从句，先行词为carbon dioxide,nitrogen,water vapor and other gases.in time 1) 终于；迟早；最后2) 及时，来得及（用作此意是，in time后常跟for sth 或to do sth.)拓展：at no time 任何时间都不 at a time 每次，一次at one time曾经，一度 at the sane time 同时，然而at times有时，时常（=sometimes=for time to t

9、ime)in no time立刻 ahead of time提前all the time 一直，始终 on time按时，准时for the time being 暂时 once upon a time从前take one，time从容进行 kill time消磨时间(2013陕西高考)The manager wants to see changes in the company,and I am sure he will _. A.in particular B.in turn C.in change D.in time (2012江苏高考)-Thank God youre safe! -I

10、 stepped back,just _to avoid the racing car.4. It was not immediately obvious that water was to be fundamental to the development of life. 水对生命的发展起关键作用，这一点在当时并不明显。be fundamental to 对.必不可少/至关重要 fundamental adj.基本的，基础的be similar to 与.相似be harmful to对.有害be important to 对.来说是重要的翻译：有些专家认为，阅读是学校教育所依赖的基本技能

11、。(2015安徽高考)5. What many scientist 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；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。be harmful to.对.有害（=do harm to）harmless adj.无害的 be harmless to 对.无害 harmful adj.有害的 be harmful to 对

12、.有害harm n.伤害，损害 do harm to sb=do sb harm 对某人有害学法点播：有些单词其词性的变化形式和harm类似，如：carecareful（小心的）careless（粗心的）carelessness（n粗心）hopehopeful（有希望的）hopeless（没有希望的）hopelessness(n绝望）helphelpful（有帮助的）helpless（无助的）helplessness（n无可奈何）(2010浙江高考)Many lifestyle patterns do such_great harm to earth that they actually sp

13、eed up_weakening of the human body.A.a;/ B./;the C.a;the D./;/6. They multiplied and filled the oceans and seas with oxygen ,which encourage the later development of early shellfish and all sorts of fish.它们繁殖起来使得海洋充满了氧气，这为早期的贝类及各种鱼类后来的进化创造了条件。multiply v.繁殖；成倍增加；迅速增加；乘；乘以链接：add v.加；增加；添加 plus prep.加上

14、subtract v.减；减去；扣除 minus prep.减去2+2=4 Two plus/added to two is four.4-2=2 Four minus two is two. Two subtracted from four is two.22=4 Two times/multiplied by two is four.42=2 Four divided by two is two.7. Later when the plants grew into forests,reptiles appeared for the first time.后来，当这些植物长成森林时，爬行动物

15、第一次出现了。1) 句法分析：when引导时间状语从句；介词短语for the first time 作状语。Grow into sth不能用于被动语态。2) for the first time 第一次拓展：This is/was the first .time +that 从句，表示“这是某人第几次做某事”，从句常用完成时态。即：主语连系动词为is时，从句用现在完成时，为was时，从句用过去完成时。3) grow into sth 变成，变得习惯于（不能用于被动语态）grow away from sb 逐渐疏远某人grow on sb 逐渐为某人所爱grow out of sth 产生于；

16、体型上太胖而穿不上衣服grow up （指人或物）长大；成长；成熟8. They laid eggs and existed on the earth for more than 140million years.它们也生蛋，在地球上生存了一亿四千多万年。搭配：exist in存在于.中 exist on(=live on) 靠.为生/生存单词积累：existence n.存在，生存 existing adj.现存的，现行的拓展：come into existence /being 形成，出现 in existence 现存的；存在的(2010江苏高考) The experiment has

17、ruled out the possibility of the _(exist) of any life on that plant,but it dose not mean there is no life on other plants. 9. These 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态，因为它们从体内生产出幼崽并给幼崽哺乳

18、。give birth to 分娩；生孩子；产生；引起链接：at birth 在出生时，诞生时by birth 天生；生来；在血统上be of good/noble birth 出生名门bring.to birth 使.产生10. Thus they have , in their turn , become the most important animals on the plant.于是，他们接着成为了这个行星上最重要的动物。thus adv.因此，于是，所以，这样，如此In ones turn 轮到某人;接着拓展：by turns 轮流，依次 in turns 依次，反过来take t

19、urns to do sth 轮流做某事Its ones turn to do sth 轮到某人做某事(2007湖北高考) People try to avoid public transportation delays by using their own cars,and this _creates further problems.A.in short B.in case C.in doubt D.in turn11.They are putting too much carbon dioxide into the atmosphere,which prevents heat from

20、escaping from the earth into space. 他们把过多的二氧化碳排放到大气层中，这使得地球上的热量不能释放到太空中去。句法分析：which prevents .space是which引导的非限制性定语从句，which指代前面的整个句子。prevent.（from）doing 阻止.做误区警示：stop sb (from)doing sth 阻止某人做某事keep sb from doing sth 阻止某人做某事protect sb from/against sth 保护某人免遭某物（伤害）defend sd from sth保卫某人不受某物伤害(2012福建高考)

21、 China recently tightened(加紧）its waters controls near the Huangyan Island to prevent Chinese fishing boats from _(attack)in the South China Sea.12. How life began on earth is one of the biggest puzzles that scientist found hard to solve. 生命究竟是怎样起源的是科学家们觉得最难解决的问题之一。puzzle 1) n.难题；谜搭配：be in a puzzle 不

22、知如何是好；感到困惑2) v.（使）迷惑；（使）为难搭配：puzzle about /over苦苦思索单词积累：puzzled adj.感到困惑的，困惑的 puzzling adj.令人迷惑的13. I cheered up immediately and floated weightlessly around in our spaceship cabin.我立刻高兴起来，由于失重，我在太空舱里飘来飘去.cheer up（市）高兴起来，（使）振作起来链接：cheer .on为.加油/鼓劲 Cheers！（祝酒时用）干杯！(天津高考)-Im thinking of the test tomorr

23、ow.Im afraid I cant pass this time.-_! Im sure youll make it.A.Go ahead B.Good luck C.No problem D.Cheer up14.But when I tried to step forward,I found I was carried twice as far as on the earth and fell over.但当我尽力向前迈步的时候，我发觉我被送出去很远，步子的跨度竟是在地球上的两倍，因此我摔倒了。twice as .as .的两倍.,这是一种倍数表示方法英语里常见的倍数表示法有三种：A

24、is+倍数+形容词比较级+than BA is+倍数+as+形容词原级+as BA is+倍数+the size/weight/height/length/width.+of Bas .asas +形容词、副词原级+asas +adj.+a/an+单数可数名词+asas +adj.+复数可数名词+as拓展as many /much as 多达as light as feather 轻如鸿毛as soon as. 一.就.as/so far as 远到.;一直到.as early as 早在as strong as a horse 强壮如牛as long as 长达as well as 除. 之

25、外，还as good as 与.几乎一样as .as possible 尽可能地.(2013安徽高考)1.Its said that the power plant is now_large as what it was.A.twice as B.as twice C.twice much D.much twice(2011陕西高考)The new stadium being built for the next Asian Games will be _ _ _ _(三倍大）the present one.15.“Oh dear”, I cried,“walking does need a

26、bit of practice now that gravity has changed.” “天哪”，我大声说，“重力改变了，看来走路的确需要练一练了。”句法分析：now that 引导原因状语从句。动名词walking 作主语，并且用does来强调谓语动词need。now that既然（引导原因状语从句）(2015湖北高考)The team are working hard to analyze(分析）the problem_they can find the best solution.16. We watched, amazed as fire broke out on the out

27、side of the spaceship as the earths gravity increased. 我们惊奇地看到，随着地球引力的增加，宇宙飞船的外层燃烧起火。break out 突然开始，爆发 break up 解散；破碎；结束break through 突破；冲垮 break away from.脱离.break down出故障；坍塌；（精神，身体）垮掉 break in进入；插话break into 强行进入（某处）；突然开始（笑，欢呼等）(2012陕西高考)1.He had to pause from time to time to wipe the sweat from h

28、is forehead,because the air-conditioning system_.A.broke in B.broke up C.broke out D.broke down(2015天津高考)See, your computer has broken_again! It doesnt make sense to buy the cheapest brand of computer just to save a few dollars.17. In our solar system eight planets circle around the sun. system n.C系

29、统，体系；体制，制度；U条理，秩序the solar system 太阳系a social system 社会制度under the new/old system 在新/旧制度下have system in ones work 工作有条理18. Can you match the names with the planets? match v. 和.协调，搭配；与.匹敌，成为.的对手n. 火柴；比赛；对手；配偶match .with 使.和.搭配match up to 相当，配得上be a match for 与. 相匹配find/meet one,s match 棋逢对手，遇上对手match

30、 point 最后决定胜负的分；赛点19. It exploded loudly with fire and rock.explode v.爆炸，爆破；突然爆发；突增；破除；推翻explosion n.爆炸；爆裂；突增 unexploded adj.未爆炸的explosive adj.易爆炸的，易爆发的；突增的 explosively adv. 爆炸地；突增地explode a bomb =set off a bomb 使炸弹爆炸explode a superstition 破除迷信explode into wild laughter 突然大笑起来the exploding world population 迅猛增长的世界人口20. As a result of this event, a great dust cloud formed in the sky blocking out the sunlight.block out 挡住，遮住（光线，声音等）, 忘掉，抹去（不愉快的事情）block out （用路障）封锁，堵住block up 塞住，封住block ones way 挡住某人的去路block sth.in/out