新概念2-第43课-课件

1、can/cant/could/couldntI can dance the disco. I cant perform ballet.I could row a boat one year ago.I couldnt swim when I was four.fly kites/make model planes/take photos /sing English songs. Review First listen and then answer the question.听录音，然后回答以下问题。 How was the plane able to clear the mountains?

2、The American explorer ordered his men to throw out two heavy food sacks so the plane rose to10000 feet.New words and expressions 生词和短语pole n. （地球的）极flight n. 飞行explorer n. 探险家lie v. 处于serious adj. 严重的point n. 地点seem v. 似乎crash v. 坠毁sack n. 袋子clear v. 越过aircraft n. 飞机endless adj. 无尽的plain n. 平原Ask an

3、d answer:1. When did the man successfully fly over the South Pole for the first time ?2.Who successfully flew over the South pole for the first time ?3.Would the plane crash?4.How did they clear the mountain?5.Why did Byrd now know that he would be able to reach the South Pole ?6.Was there any diffi

4、culties? In 1929, three years after his flight over the North Pole, the American explorer, R.E. Byrd, successfully flew over the South Pole for the first time. Though, at first, Byrd and his men were able to take a great many photographs of the mountains that lay below, they soon ran into serious tr

5、ouble. At one point, it seemed certain that their plane would crash. It could only get over the mountains if it rose to 10,000 feet. Byrd at once ordered his men to throw out two heavy food sacks. The plane was then able to rise and it cleared the mountains by 400 feet. Byrd now knew that he would b

6、e able to reach the South Pole which was 300 miles away, for there were no more mountains in sight. The aircraft was able to fly over the endless white plains without difficulty. can Can is one of the most commonly used modal verbs in English. It can be used to express ability or opportunity, to req

7、uest or offer permission, and to show possibility or impossibility. Exles: I can ride a horse. ability We can stay with my brother when we are in Paris. opportunity She cannot stay out after 10 PM. permission Can you hand me the stapler? request Any child can grow up to be president. possibility Cou

8、ld Could is used to express possibility or past ability as well as to make suggestions and requests. Could is also commonly used in conditional sentences as the conditional form of can. Exles: Extreme rain could cause the river to flood the city. possibility Nancy could ski like a pro by the age of

9、11. past ability You could see a movie or go out to dinner. suggestion Could I use your computer to email my boss? request We could go on the trip if I didnt have to work this weekend. conditional Could cannot be used in positive sentences in which you describe a momentary or one-time ability. e.g.

10、Yesterday, I could lift the couch by myself. Not Correct 比较can和beableto表示成功地做了某事时，只能用was/wereableto，不能用could。 Hecouldswimhalfwaybeforehegottired.(not correct) Hewasabletoswimhalfwaybeforehegottired.(correct) can用于表示“能力”时是指现在的能力，过去或将来的能力通常用was/wereableto或will/shallbeableto表示。 Sum up the language poin

11、ts习惯用语:dance the disco /perform ballet/ take photos /word out /taketo/row a boat /be good at /sing songs/fly a kite/make model planes /be in hospital/have a good time语法知识:情态动词: can/cant【New words and expressions】 生词和短语 polen.（地球的）极South Pole 南极North Pole 北极Pole Star 北极星liev. 处于tell a lie 撒谎lie n.谎言;

12、 lie v.撒谎 Eg.:You lied. You,liar!lie,lied,lied 撒谎lie/lai/,lay/lei/,lain/lein/处于,位于stay in bed/lie in bed 躺在床上in bed 介词短语, lie vi.lie 现在分词- lyinglay v. 放,放置;lay an egg下一个蛋lay vt. lay sth. 放,放置lay,laid,laidexplorern. 探险家explore v.探险exploration n.(科研相关)探险,探求,开发adventuren.冒险(追求刺激)venture n. 冒险(为了财富,没有生命

13、保障)seem v. 似乎，看起来seem + as if 看起来似乎他看起来似乎以前从来没有在英国居住过。He seems as if he had never lived in England before.seem + adj. 他看起来很有钱。He seems rich.seem to beHe seems to be rich.seem that 看起来似乎It seems that he is rich.clear v. 越过(凌空、不接触地)越过, 跳过，没有接触面的飞跃飞跃山峰clear the mountain那匹马越过了栅栏The horse cleared the fen

14、ce. over adv. 越过(距离)go over飞跃plain n. 平原plain girl 平凡的女孩lay是动词lie的过去式。表示“处于什么位置”。 lie与lay的区别：（1）lie作“躺，卧、处于（位置）”解 时，过去式为：lay,过去分词为：lain；（2）lie作“撒谎”解时， 过去式为：lied,过去分词为：lied；（3）lay可作“放，摆，搁；产卵”解，其过去式和过去分词均为：laid 【例】 The books still _ where I _ them a month ago. A: lie, laidB: lay, laid C: lied, lain D

15、lain, lied 此题选B。这句话的意思是：上个月前我“放”在那的书现在还“躺”在那里。 pointn. 地点point 点,一般指从飞机上向下看的点地点place,spotdot 点- atseemv. 似乎seem + as ifseem + adv.seem to beseem that.Eg. : He seems rich.He seems to be rich.It seems that he is rich.it seems that.看起来似乎.seem as if 看起来似乎Eg.: He seems as if he had never lived in England

16、 before.crashv. 坠毁crash(从上向下掉)aircrash 空难strike 撞击clash 撞击,冲突clearv. 越过over越过(距离)clear(凌空)越过go over飞跃clear the mountain 飞跃山峰The horse cleared the fense.plainn. 平原mountains 高山plain girl 平凡的女孩Eg.: Im a plain girl.课文讲解1、In 1929, three years after his flight over the North Pole, the American explorer, R

17、.E. Byrd, successfully flew over the South Pole for the first time.for the first time 第一次time表示“次，回”，还可以说this time，last time，next time，another time，each time，for the last time我最后一次提醒你，如果你不快点，你就会赶不上火车的。 I remind you for the last time that if you dont hurry, youll miss the train.下次你见到他的时候，把这些照片给他。 Giv

18、e him these photos next time you see him.（1）这句话包含两个同位语。three years after为 1929的同位语，作插入性的补充说明；REByrd 作 the American explorer 的同位语。2、Though, at first, Byrd and his men were able to take a great many photographs of the mountains that lay below, they soon ran into serious trouble.连词though引导让步状语从句，其含义是“虽

19、然，尽管”。它永远不与but连用。can.可能性（只用于现在式和过去式）be able to.可能性,成功地做（可用于各种时态）take a photograph of 拍的照片在他离开家之前，他给他的房子照了张照片。He took a photograph of his house before he left home.run into trouble = get into trouble 遇到麻烦，陷入困境每次他遇到困难了，他都向父母寻求帮助。Each time he ran into trouble, he asked his parents for help.3、At one poi

20、nt, it seemed certain that their plane would crash.at one point 在某一地方，在某一时刻（point也指时间上的某一点）他曾一度下决心要当个画家。 At one point, he made up his mind to become a painter.it为先行主语，真正的主语为that引导的从句。it作先行主语时经常与seem，appear，look等连用：现在似乎可以肯定会议将被推迟。 It now looks certain that the meeting is going to be put off.4、It coul

21、d only get over the mountains if it rose to 10,000 feet.rise to 上升至5、The plane was then able to rise and it cleared the mountains by 400 feet.by表示“相差，以之差”的意思我晚了10分钟，没赶上火车。 I missed the train by ten minutes. 他比我小两岁。 He is younger than me by two years. for there were no more mountains in sight. 因为前面再没

22、有山了。for表示“因为”。 in sight表示“在看得见的范围内”、“在可看见之处”：No man was in sight.一个人也看不见。Can 和be able to的区别can与be able to 用法上的区别口语中, can 与be able to在用法上既有相同的一方面, 又有不同的地方,这是应该引起注意的。当它们表示能力的时候，是同义的。如：He can speak two foreign languages.He is able to speak two foreign languages.表示过去通过努力终于做成了某事要用be able to，而不能用can。如： I

23、was able to swim to the bank after the boat turned over.can 和be able to 都可以表示能力.can泛指一般的能力,而且只有两种形式,即:can, couldbe able to 则主要指具体做到了某件事的能力，其形式主要是靠be 发生变化，所以形式比can 多可以说：I can swim. I am able to swim. 但是不能说：All the people could escape from the big fire in time. 只能说：All the people were able to escape f

24、rom the fire in time.can能表猜测，be able to不能。can的这种用法主要用于疑问句和否定句。Somebody is knocking at the door. Who can it be?It cant be our teacher who is knocking at the door.其肯定形式是must be。如:It must be our teacher who is knocking at the door. be able to 后边接动词不定式表示一种实际情况时，其否定形式不是be not able to，而是cannot。如：Were you

25、able to catch the first bus yesterday morning?No, I couldnt.7. 一般说来, be able to 后边的动词不定式没有被动语态。如:Im sure he is able to correct his mistakes in grammar.不说: *Im sure his mistakes are able to be corrected by him.美国探险家 RE伯德在飞越北极3年之后，于1929年第1次飞越了南极。（1）这句话包含两个同位语。three years after为 1929的同位语，作插入性的补充说明；REBy

26、rd 作 the American explorer 的同位语。（2）for the first time 表示“第一次”，time在这里表示“次”、“回”，还可以说 this time, last time, next time, another time, each time, for the last time等：I remind you for the last time that if you dont hurry, youll miss the train.我最后一次提醒你，如果不快点，你会误了火车的。Give him these photos next time you see

27、him.下次你见到他时把这些相片给他。 虽然开始时伯德和他的助手们拍下了飞机下面连绵群山的大量照片，但他们很快就陷入了困境。（1）连词though引导的是让步状语从句，其含义为“虽然”、“尽管”。这个从句中的时间状语at first被单独用逗号隔开了，它如果按正常的词序应放在从句的末尾，但有可能会引起误解。（2）at first与主句中的 soon形成时间上的照应，表示先后次序。（3）take a photograph of 表示“拍的照片”：He took a photograph of his house before he left home.他离家前给他家的房子拍了一张照片。（4）th

28、at lay below为 the mountains的定语从句，that为从句的主语。（5）run into trouble的含义与 get into trouble相似，表示“陷入困境”：Each time he ran into trouble, he asked his parents for help.每当他陷入困境时，他都向他父母求助。在有个地方，飞机似乎肯定要坠毁了。（1）at one point在此处可以解释为“在有个地方”，但它通常的含义为“在某一时刻”，point指时间上的某一点：At one point, he made up his mind to become a painter.他曾一度下决心要当个画家。（2）it为“先行主语”，真正的主语为that引导的从句。it作先行主语时经常与seem，appear，look等连用：It now looks certain that the meeting is going to be put off.现在似乎可以肯定会议将被推迟。5 it cleared the mountains by 400 feet. 它在离山头400英尺的高度飞越了过去。clear在这里表示“（不接触地）越过”：He cleared 2.