人教新课标高中英语必修三《Unit 4 Period Three》课件

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1、Unit 4 Astronomy：the science of the stars,内容索引,Period Three Learning about Language & Using Language,课文预读,互动探究,达标检测,基础自测,课文预读,.Read the passage and judge whether the following sentences are true (T) or false (F). 1.The force of gravity changed three times and the last change was the most powerful.(

2、) 2.We were too far from the earth to feel its pull.( ) 3.On the moon，our weight would be less than on the earth because we were too far from it.( ) 4.Leaving the moons gravity was as painful as leaving the earths.( ) 5.Space travel was very exhausting，so the writer didnt like it at all.( ),F,T,F,F,

3、F,.Read the passage carefully and choose the best answers. 1.The passage is mainly about . A.an introduction of the moon B.the gravity that I felt on my way to the moon C.my visit to the moon D.my friend Li Yanping，an astronomer,答案,1,2,3,4,5,2.When we were going up，we felt . A.we were pressed back i

4、nto our seats B.we were heavier than we were on the earth C.as if we were flying D.the rocket was shaking strongly,答案,1,2,3,4,5,3.When or where did the author feel strongest of the gravity of the earth? A.On the moon. B.On the half way to the moon. C.At the very beginning. D.On their leaving from th

5、e moon.,答案,1,2,3,4,5,4.Why was the spaceship not falling back to the earth? A.Because it was too far from the earth to feel its pull. B.Because it was too big. C.Because it was far from the moon. D.Not mentioned in the text.,答案,1,2,3,4,5,5.What causes the author to feel that he becomes weightless on

6、 the moon? A.Spaceship. B.Gravity. C.His friend. D.Good feelings of the author.,答案,1,2,3,4,5,基础自测,1. n.生物学 2. n.万有引力；重力 3. n.卫星；人造卫星 4. n.气候 5. vi.& vt.碰撞；坠落 6. n.宇宙飞船 7. n.& vt.拉(力)；拖；牵引力 8. vi.& vt.(使)浮动；(使)漂浮n.漂浮物,一、词汇过关,基础词汇,biology,gravity,satellite,climate,crash,spaceship,pull,float,1. adj.温和的

7、；文雅的 adv.温和地 2. n.物理学家 n.物理学 adj.物理的；物理学的；体力的 3. vi.& vt.减少；减轻 adj.较少的 4. vt.用尽；耗尽；使精疲力尽 adj.精疲力尽的,拓展词汇,gentle,gently,physicist,physics,physical,lessen,less,exhaust,exhausted,1.构词法 规则less (adj.较少的) lessen (v.减少；减轻) 联想(1)brighten使明亮 (2)broaden拓宽 (3)deepen加深 (4)loosen变松 2.话题词汇与“学家”有关的词汇 (1)physicist n

8、.物理学家 (2)biologist n.生物学家 (3)chemist n.化学家 (4)politician n.政治家 (5)geologist n.地质学家,联想归纳,1. 挡住(光线) 2. 感到高兴；感到振奋 3. 既然 4. 熟悉；掌握；理解 5. 突发；爆发 6. 密切注意；当心；提防,二、短语互译,汉译英,block out,cheer up,now that,get the hang of,break out,watch out for,英译汉,1.make a trip _ 2.fall back to _ 3.get close to _ 4.fall over _,去

9、旅行,落回到,接近；靠近,跌倒；摔倒,教材原句 1.When we get closer to the moon，we shall feel its gravity pulling us，but it will not be as strong a pull as the earths. 当我们更接近月球时，就会感到月球的引力在拉我们，但是月球的引力不像地球的引力那么大。 分析解读 原级比较的特殊句型：“asadj.a/ann.as”。,三、重点句式,仿写运用 I hope you can give them encouragement to live _you do. 我希望你能给予他们鼓励

10、，让他们和你们一样过着丰富多彩而充实的生活。,as rich and full a life as,教材原句 2.But when I tried to step forward，I found I was carried twice as far as on the earth and fell over. 但当我试图往前走时，我发现自己被带到一个步幅相当于地球上两倍远的地方并且摔倒了。 分析解读 倍数表达法之一：“倍数asadj./adv.(原级)as.”。 仿写运用 As we all know，cats sleep people. 众所周知，猫睡觉的时间是人类的两倍。,twice as

11、 much as,教材原句 3.“Oh dear，” I cried，“walking does need a bit of practice now that gravity has changed.” “天哪，” 我大声说， “既然重力改变了，看来走路也的确需要练一练了。” 分析解读 now that引导原因状语从句。 仿写运用we have no money，we cant buy a new car. 既然没钱，我们没法买新车。,Now that/Since,教材原句 4.We watched，amazed as fire broke out on the outside of the

12、 spaceship as the earths gravity increased. 我们惊奇地看着，随着地球引力的增加，宇宙飞船的外层燃烧起火。 分析解读 形容词作伴随状语，补充说明主语所处的状态。 仿写运用 After the long journey，the three of us went back home， . 长途旅行之后，我们三人回到了家，又饿又累。,hungry and tired,互动探究,Other scientists believe that a comet crashed into the earth long ago and caused the disappe

13、arance. 其他的科学家们认为很久以前一颗彗星撞到地球上，这导致了(恐龙的)消失。,crash vi.& vt.碰撞；坠落；破产；n.相撞(事故)；(飞机的)坠落；坠落声；撞击声 crash into.撞到上；闯入 a plane/car crash飞机失事/汽车撞车事故,重点词汇,(1)More than twenty passengers were injured in the train crash. 20多名乘客在火车车祸中受伤了。 (2)Unfortunately，the car crashed a big stone and burst into flames. 不幸的是，汽车

14、撞在一块大石头上并燃烧起来。,into,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。,pull n.& vt.拉(力)；拖；牵引力 pull down拆毁 pull in (火车等)到站，进站；驶向路边(或某处)停靠 pull through康复，痊愈；渡过难关 pull up停车，停止,(1)Steam en

15、gines were used to pull the carriages. 蒸汽机过去被用来拉动四轮车。(2017全国) (2)Some old buildings have been pulled down in this area. 这个地区的一些旧建筑已被拆掉。 (3)Dont worry；your father is going to . 不要担心，你父亲会康复的。,pull through,I cheered up immediately and floated weightlessly around in our spaceship cabin watching the eart

16、h become smaller and the moon larger. 我立刻感到高兴起来，由于失重我在太空舱里飘来飘去，我望着地球越来越小，而月球越来越大。,(1)cheer (sb. /sth. ) up (使)感到高兴；(使)感到振奋 cheer v.& n.欢呼，喝彩，加油 cheer sb. on为某人加油 (2)cheerful adj.高兴的；兴高采烈的 (3)Cheers！干杯！,(1)Cheer up！We are near the finishing line. 打起精神，我们临近终点线了。 (2)Cathy didnt expect any award but was

17、 still there to cheer on her friends. 凯西没有期待任何奖励，但是仍旧在那里为她的朋友们加油鼓劲。 (3)They are both very (cheer) in spite of their colds. 他俩虽然感冒了，但是都兴高采烈的。 单句改错 (4)Cheer！Congratulations on your success!,cheerful,Cheers,We watched，amazed as fire broke out on the outside of the spaceship as the earths gravity increa

18、sed. 我们惊奇地看着，随着地球的引力增加，宇宙飞船的外层燃烧起火。,break out (战争、火灾等)突发；爆发 break away from脱离；逃脱 break down出故障，坏掉；失败；(健康等)垮掉 break in插话；破门而入 break into破门而入 break up粉碎；解散；分手,(1)When the fire broke out，many people were shopping in the supermarket.火灾发生时，超市里很多人在购物。 (2)Once you join them，you can never break away from th

19、em. 一旦你加入了他们，你就永远不能脱离他们。 (3)To my anger，the car on the way. 让我生气的是，汽车在路上抛锚了。 (4)When did you with your boyfriend? 你什么时候与男朋友分手的？ (5)We were having a heated discussion when he . 我们正在热烈地讨论，这时他插嘴了。,broke down,break up,broke in,Watch out for.小心,watch out (for)密切注意；当心；提防 watch over照看；看守 keep a watch on守望；

20、注视,(1)We have to watch out for fast traffic along here. 这里来往的车辆开得很快，我们必须得小心。 (2)Watch out！There is a car coming! 小心！有辆车开过来了！ (3)I his house while he was out. 他外出期间，我照管他的房子。 (4)The lifeguard was the children playing in the pool. 救生员守望着在水池里玩耍的孩子们。,watched over,keeping a watch on,经典句式,When we get close

21、r to the moon，we shall feel its gravity pulling us，but it will not be as strong a pull as the earths. 当我们更接近月球时，就会感到月球的引力在拉我们，但月球的引力不像地球的引力那么大。,as strong a pull as the earths属于“as.as.”结构。其否定式为：not as/so.as.。as.as.结构的具体形式有： as形容词a/an可数名词单数as.像一样的 as形容词/副词原级as.像一样和一样多,as much不可数名词as. as many可数名词复数as.,

22、(1)She is as bad-tempered as her mother. 她和她妈妈一样，脾气很坏。 (2)His bedroom is not as/so neat as his elder sisters. 他的卧室没有他姐姐的整洁。 (3)Youve made I have. 你犯的错误和我犯的一样多。 单句改错 (4)It was so cold a day as we had to stay at home.,as many mistakes as,that,But when I tried to step forward，I found I was carried twic

23、e as far as on the earth and fell over. 但当我试图往前走时，我发现自己被带到一个步幅相当于地球上两倍远的地方并且摔倒了。,twice as far as.是一种倍数的表示方法，意为“是的两倍远”。 倍数的表示法： (1)倍数asadj./adv.(原级)as. (2)倍数比较级than. (3)倍数the size(height/length/width.)of. (4)倍数what从句,(1)This table is three times as long as that one. This table is three times that one

24、. This table is three times that one. 这张桌子是那张桌子的三倍长。 (2)The price of the house this year is last year. 今年的房价是去年的两倍。,the length of,longer than,twice what it was,“Oh dear，” I cried，“walking does need a bit of practice now that gravity has changed.” “天哪，” 我大声说， “既然重力改变了，看来走路也的确需要练一练了。”,(1)now that既然，由于

25、，引导原因状语从句，在口语中可以省略that。与now that意思相近的有seeing that，since等。 (2)就像although/though不能与but连用，because不能与so连用一样，当now that引导的从句表示原因时，主句前不能加so。 注意：引导原因状语的介词短语有due to，thanks to，because of，as a result of，owing to，on account of等。,(1)Now (that) you have mentioned it，Ill keep it in mind. 既然你提到了，我会铭记在心。 (2)Seeing t

26、hat nobody was at home，I had to leave. 由于没人在家，我也只好走了。 (3) the professors lecture is very interesting，why not go and attend it? 既然教授的讲座很有趣，为什么不参加呢？ 单句改错 (4)Now that you are ready，so we can go now.,Now(that)/Since,达标检测,.单句语法填空 1.Look！There is something (float) on the river. 2.As we all know，Qian Xuese

27、n is a famous (physics). 3.After he waited for two hours，the train finally pulled . 4.There must have been an angel watching me that day. 5.The sports meeting was put off a result of the bad weather.,floating,physicist,in,over,as,6.It was the thick curtain that blocked the sunlight. 7.Cheer ！The peo

28、ple all over the country will help you rebuild your homes. 8.The motorcycle ran so fast that it crashed the fence. 9. (leave) the earths gravity was very painful for us at the time. 10.The mother warned her son not to get close the old building.,out,up,into,Leaving,to,.完成/翻译句子 1.北京是我家乡的十倍大。(至少2种表达方式

29、) _ _ _ 2.由于看过了她的生活状况，我们才知道为什么她需要那么多钱。(now that)，we know why she needs so much money.,Beijing is ten times as big as my hometown.,Beijing is ten times bigger than my hometown.,Beijing is ten times the size of my hometown.,Now that weve seen how she lives,3.小男孩说话的口吻好像他是她父亲似的。 The little boy talked .

30、4.你认为这个公园怎么样？ 我认为它和我们上星期去的那个一样漂亮。 What do you think of the park? I think it is the one we visited last week. 5.下一步该做什么我们仍然不知道。remains unknown.,as if/though he were her father,as beautiful a park as,What we should do next,.课文短文改错 Last month I paid a visit the moon with my friend.Before we left，I was

31、told the force of gravity would change three time on our journey. Then we took up.As we left the earth，I became very heavily.Gradually the weight lessen.When I was in space，it was disappeared.We floated weightlessly around in the cabin and I cheered up., to,times,off,heavy,lessened,When I was on the moon，I was surprising to find even walking needed a bit of practice now that gravity changed.The returning of the earth was very frightened.We were amazed to watch fire broke out on the outside of the ship.,surprised,to,frightening,break,