1、Unit 5 Look into ScienceLesson 25: Let s Do an Experiment!I. Learning aims:Master the new words:experiment, jar, upside, pour, correct, scientific, method, raincoat, force, pressure, concludeII. Learning important and difficult points:1) I cover the top with a piece of cardboard and hold it there.2)

2、 I am so sure of my theory that Brian can do the experiment over your head and I know you won3) The force of the air keeps the water in the jar.4) It is strong enough to hold the water.Language Points:1. I cover the top with a piece of cardboard and hold it there.我用紙板把上面蓋住然后托住它。【用法】句式coverwith 意為 “用

3、覆蓋 ”，類似句式be covered with表示 “被覆蓋 ”，這是一個系表結(jié)構(gòu)。【舉例】 My mother covered the table with cloth.我媽媽用布把桌子蓋住了。 The bed is covered withpaper. 床上蓋滿了紙。2. I am so sure of my theory that Brian can do the experiment over your head and I know you won我對布萊恩在你頭上做實驗的理論很有把握，并且你不會濕的。【用法】這句話中的句式be sure of 意為 “對有把握 ”；that Br

4、ian can do the experiment over your head是定語從句，修飾前面的名詞theory。【舉例】 Are you sure of this matter?你對這件事情有把握嗎？This is the book that I borrowed fromthe library. 這是我從圖書館借的書。3. It is strong enough to hold the water.它力量很大足以把水托住。【用法】句中的enough to do 意為 “足以做某事 ”，這里的enough 起副詞作用，用在形容詞或副詞后作狀語。【舉例】 Allan is old eno

5、ugh to go to work.艾倫到上班年齡了。Lesson 26: Keep the Candle BurningI. Learning aims:Master the new words:holder, shallow, lighter, match, examine, oxygenII. Learning important and difficult points:1) Let the candle burn for two or three minutes.2） When the candle stops burning, it has used up all the oxyg

6、en in the air.3） How far does it rise?4) Because about one fifth of the air is made up of oxygen, the water rises and fills about one fifth of the jar. Language Points:詞匯詳解1. When the candle stops burning, it has used up all the oxygen in the air. 當蠟燭停止燃燒時， 它就用完了空氣中所有的氧氣了。【用法】 use up 意思是 “用完、用光 ”，這是

7、 “動詞 + 副詞 ”短語。這類短語用名詞作賓語時，名詞可用在副詞前，也可用在副詞后；用代詞作賓語時，代詞則必須用在副詞前。【舉例】 I gave Li Ming a lot of pencils, but he has used them up already.我給了李明很多鉛筆，但他已經(jīng)把它們都用完了。2. Because about one fifth of the air is made up of oxygen, the water rises and fills about one fifth of the jar.因為組成空氣的成分大約五分之一是氧氣，所以水會上升并且填充瓶子的大

8、約五分之一。【用法】短語be made up of 意為 “由組成 ”，后加名詞或代詞作介詞賓語。【舉例】 This grade is made up of ten classes. 這個年級是由十個班組成的。【用法】句中的one-fifth 意思是 “五分之一 ”，這是一個分數(shù)。分數(shù)的表達一般遵循以下規(guī)則：分子用基數(shù)詞，分母用序數(shù)詞；當分子大于一時，分母要用復(fù)數(shù)形式；并且其中的連字符號有時可以不要。【舉例】 one-fourth四分之一three fifths五分之三Lesson 27: Planet DannyI. Learning aims:Master the new words:te

9、lescope, solar, unless, double, mysteryII. Learning important and difficult points:1) Try looking through the other end.2) Maybe Brian and I can join you after supper.3) Scientists use huge telescopes when they look for planets.4) Well, it s worth a try, even if I don Language Points: t find a plane

10、t.1. double【用法】作可數(shù)名詞，意為“兩倍、雙倍 ”，復(fù)數(shù)形式是doubles。【舉例】 Homework is double at weekend.在周末作業(yè)是雙倍的。【用法】作形容詞，意為 “雙倍的、兩倍的、兩用的”，在句中作定語或表語。【舉例】 I think you will get double harvest.我想你們會有雙倍的收成。 Wed like a double room. 我們想要一個雙人間。2. Maybe Brian and I can join you after supper.晚飯后或許布萊恩和我會加入到你這里。【用法】動詞 join 在這里表示 “加入

11、 ”，如果表示 “加入到某人的某種活動中 ”可用句式 join somebody in 。【舉例】 Lisa, can you join us in the game?麗薩，你能和我們一起做游戲嗎？3. Well, it s worth a try, even if I don好的，tfind這值a得planet一試，.即使我沒有發(fā)現(xiàn)行星。【用法】 even if 意思是 “即使、縱然 ”，引導(dǎo)讓步狀語從句，表示某種條件。【舉例】 He will come on time even if it rains.即使下雨 ,他還是會準時來的。【拓展】在口語中，even if 往往用在句首。【舉例】

12、Even if he is poor, he always looks happy.即使他很窮，但看上去他總是很快樂。Lesson 28: The Study of Living ThingsI. Learning aims:Master the new words:Chip Taylor, biology, butterfly, migrate, fantastic, completely, grandchild, female, milkweed, chemical, puzzlingII. Learning important and difficult points:1) Fantas

13、tic facts about the butterfly have been drawing Dr. Taylor s attention.2) Here, as many as 230 million butterflies spend the winter.3) But in Mexico, people cut down the trees that the butterflies need to rest on because they want more land for farming.4) This is both puzzling and interesting for ma

14、ny scientists.Language Points:1. fantastic【用法】作形容詞，意為“奇異的、極好的、了不起的”，在句中作定語或表語。【舉例】 I think this is a fantastic invention.我想這是一個了不起的發(fā)明。These flowersare sofantastic. They have many different colours.這種花太奇異了。它們有很多不同的顏色。2. chemical【用法】作可數(shù)名詞，意為“化學(xué)物質(zhì)、化學(xué)制品”，復(fù)數(shù)形式是chemicals。【舉例】 There are no chemicals in thi

15、s kind of food.這種食品中沒有化學(xué)物質(zhì)。【用法】作形容詞，意為“化學(xué)的、化學(xué)作用的”，在句中作表語或定語。【舉例】 We can find chemical additives in many foods.我們在很多食品中發(fā)現(xiàn)了化學(xué)添加劑。3. Fantastic facts about the butterfly have been drawing Dr. Taylor這些有關(guān)蝴蝶s的attention奇異的事.實引起了泰勒先生的注意。【用法】句中的have been drawing 是現(xiàn)在完成進行時，它由“助動詞have (has) + been + 現(xiàn)在分詞 ”構(gòu)成，當主語

16、是第三人稱單數(shù)時用助動詞has，其他情況用助動詞have。現(xiàn)在完成進行時主要表示從過去開始一直持續(xù)到現(xiàn)在的動作，這個動作是否延續(xù)下去，要根據(jù)上下文而定。它往往與表示一段時間的時間狀語連用，如：all the time, this month, all day, these few days, for a year,since a week ago 等。【舉例】 She has been playing basketball after school this week.這個星期她放學(xué)后一直打籃球。Tonyhas been drawing in his bedroom all the after

17、noon.托尼在臥室畫了一下午。4. This is both puzzling and interesting for many scientists.對很多科學(xué)家來說這既令人費解又很有趣。【用法】 連詞 bothand 的意思是 “ 和都，既也 ”，它可以連接句中句子成分相同的詞語，如果用它連接主語時，謂語動詞要用復(fù)數(shù)形式。【舉例】 She likes both sports and music. 她既喜歡運動，又喜歡音樂。Both Li Ping and her mothertake exercise every morning. 李萍和她媽媽每天早晨都進行鍛煉。Lesson 29: D

18、NA The Story of YouI. Learning aims:Master the new words:DNA,blueprint,general, complex,twin,copy, repeat, pattern, identify,related, grandson, granddaughter,instructionII. Learning important and difficult points:1) In general, a blueprint is a drawing that shows how to put a house together with man

19、y different parts.2) But building a living thing is far more complex than building a house.3) Except for some twins, every living thing has its own unique DNA.4) From your DNA, scientists can identify not only you, but also people who are related to you.5) Your DNA has billions of instructions that

20、explain why you are the way you are.Language Points:1. copy【用法】作可數(shù)名詞，意為“復(fù)制品、一本、一冊”，復(fù)數(shù)形式是copies。【舉例】 This is just a copy. Have you found it?這只是一個復(fù)制品。你發(fā)現(xiàn)了嗎？I borrowed twocopies of magazines from the library.我從圖書館借了輛本雜志。【用法】作及物動詞，意為“復(fù)制、抄寫 ”，后加名詞或代詞作賓語。【舉例】 Have you finished copying the words?你抄寫完單詞了嗎？【

21、應(yīng)用】根據(jù)括號中所給漢語用適當詞語填空。We don t need any（復(fù)制品） . Write them by hand.答案： copies。表示 “復(fù)制品 ”用名詞 copy，且這里是復(fù)數(shù)形式。2. repeat【用法】作及物動詞，意為“重復(fù)、重述 ”， 后加名詞或代詞作賓語。【舉例】 What about repeat the text for another time?再重復(fù)一遍課文怎么樣？【拓展】在口語中，當沒聽清對方的話或沒看清對方的動作要求對法重復(fù)時，為了表示客套，要用Pardon？或Beg your pardon? 或 I beg your pardon?【舉例】 Par

22、don? I didnt hear your words clearly請.重復(fù)一遍好嗎？我沒聽清你的話。【應(yīng)用】根據(jù)括號中所給漢語用適當詞語填空。The teacher _（重復(fù)） the sentences and I knew its meaning at last.答案： repeated。表示 “重復(fù) ”用動詞 repeat，且這里是一般過去時。語句詳解1. But building a living thing is far more complex than building a house.但是構(gòu)建一個有生命的東西比建一座房子復(fù)雜得多。【用法】比較級前可以用much, even

23、, still, far, a bit, a little, a lot等詞加以修飾。【舉例】 This unit is much easier than that one.這個單元比那個單元容易得多。 This book is far moreinteresting than that one. 這本書比那本書有趣得多。答案：a little taller。此處用副詞a little作狀語，修飾后面的比較級taller。2. Except for some twins, every living thing has its own unique DNA.除了一些雙胞胎外，所有有生命的東西都在

24、自己獨特的DNA。【用法】except for用于表示對主要部分的肯定和對局部的否定。它不表示同類事物之間的關(guān)系，其意思是 “除了以外、除去為了、如果不是 ”。【舉例】Smith is a good man, except for his bad temper. 史密斯除了脾氣不好外， 是個好人。 Mother wouldn givet him any money except for books and stationery. 除了買書和文具外，媽媽不給他任何錢。 Except for you, I would pass the exam.如果不是你，我就會通過考試。3. From your

25、 DNA, scientists can identify not only you, but also people who are related to you.根據(jù)你的DNA,科學(xué)家不僅能辨別出你，而且能辨別出與你有關(guān)系的人。【用法】 not onlybut also是 等立連詞，意思是“不但而且 ”，它可以連接句中句子成分相同的部分，如果用它連接主語時，謂語動詞應(yīng)該以but also 后面的主語為準。【舉例】 She can sing not only Chinese songs but also English songs.她不僅會唱中文歌曲，還會唱英文歌曲。 Not only I

26、but also she has finished the work.不僅我完成了工作，她也完成了工作。【用法】短語be related to 意為 “與有關(guān)系 ”，后加名詞或代詞作介詞to 的賓語。【舉例】 I think Danny is related to this matter.我想丹尼與這件事情有關(guān)。Lesson 30: Science Affects UsI. Learning aims:Master the new words:affect, suggest, mobile phone, discovery, amazingII. Learning important and

27、difficult points:1) First, get a jar full of water and a piece of cardboard.2) The higher air pressure outside the jar holds the cardboard in place.3) The experiment you did sounds interesting.4) Scientific discoveries are making our lives better and better. Language Points:詞匯詳解1. suggest【用法】作及物動詞，意

28、為 “建議、暗示 ”，后加名詞、代詞、動名詞作賓語； 也可用在句式suggest somebodyto do something 這一句式中，表示“建議某人做某事”。【舉例】 They suggested building a new school.他們建議建一所新學(xué)校。I suggest you to do like me.我建議你想我一樣這么做。His report suggested the huge loss. 他的報告暗示了巨大的損失。【拓展】 suggestion 是它的名詞形式，意為“建議 ”，作可數(shù)名詞，復(fù)數(shù)形式是suggestions。【舉例】They gave some useful suggestions at the meeting. 在會議上他們給我們提出了一些有用的建議。【應(yīng)用】用括號中所給詞語的適當形式填空。Nobody _ （建議） repairing the machine by ourselves, so we had to have it repaired.答案： suggested。表示 “建議 ”用動詞 suggest，且這里是一般過去時。2. discovery【