新概念二册L43

1、F,Four oceans in the world,Pacific ocean,Indian ocean,Arctic ocean,A,Atlantic ocean,earth,The map of the world,Latin/South/North America,What do you know about the South Pole,penguins,Lesson 43,Over the south pole,New words:,pole flight 飞行 explorer 探险家 lie v. 处于 serious 严重的 point 地点 seem 似乎好像,crash

2、坠毁 sack 袋子 clear 越过 aircraft 飞机 endless 无尽的 plain 平原,1.When did the American explorer become the first man to fly over the South Pole? 2.Did he take a lot of photoes during the flight or not?Did he run into difficulties or not?,Listen to the tape,The American explore,R.E.Byrd,became the first man to

3、 fly over the South Pole in 1929.,He took a lot of photographs during the flight but then he ran into difficulties.,3.Could his plane get over the moutains or did it crash?What did he order his men to do? 4.Did the plane then fly over the mountains or did it crash? Did it continue without further tr

4、ouble or not?(and),His plane could not get over the mountains so he ordered his men to throw out two heavy food sacks.,The plane then flew over the mountains and continued without further trouble.,Notes,1、In 1929, three years after his flight over the North Pole, the American explorer, R.E. Byrd, su

5、ccessfully flew over the South Pole for the first time. for the first time 第一次 time 1 “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错过火车了。 I remind you for the last time that if you dont hurry, youll miss the train. time 2倍，倍数 The river is three ti

6、mes longer than that one.,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“虽然，尽管”。它永远不与but连用。 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

7、a photograph of his house before he left home. 遇到麻烦，陷入困境 run into trouble = get into trouble 每次他遇到困难了，他都向父母寻求帮助。 Each time he runs into trouble, he asked his parents for help.,3、At one point, it seemed certain that their plane would crash. at one point 在某一地方，在某一时刻 他曾一度下决心要当个画家。 At one point, he made

8、 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,4、It could 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

9、minutes. 他比我小两岁。 He is younger than me by two years.,6 for there were no more mountains in sight. 因为前面再没有山了。 in sight表示“在看得见的范围内”、“在可看见之处”： 一个人也看不见。 No man was in sight.,Grammar,Do you remember these sentence: Can I use your telephone? Could I use your telephone? can和could都可以表示“请求允许做某事”， can比较生硬，用于和

10、自己同等的人或是熟悉的朋友。 could相对比较客气，显得更加礼貌，同时也反映出请求者的犹豫不决。,：Can /be able to,2.can和be able to a.在表示现在或过去的智力、体力、技能等方面的“能力”时,can、could常可与 be able to互换。 我会游泳。 I can swim now.=I am able to swim. b. can表示“能够做某事”，不一定就真的做了。 be able to表示“有能力做某事”，做过了这件事情, 而且强调成功。 我现在能够游300米，去年我可以游100米的。 I can swim 300 meters now and l

11、ast year I was able to swim 100 meters. 这句话中，第一部分“I can swim 300 meters now”，表示“我现在能够游300米”只是说说而已，并不说明已经游过了。而后面部分“last year I was able to swim 100 meters”，表示我去年的确是游过了，可以游100米的。,c. be able to 有比 can 更多的形式。 从时态上来说：can做为情态动词，只有现在时和过去时。 be able to则有比can更多的形式，除了现在时和过去时，还有将来时和完成时。 He will come if he can.=

12、He will come if he is able to.,I can see you tomorrow. Ill be able to see you tomorrow. （将来时使用will be able to结构） I couldnt understand him.=I wasnt able to understand him. （过去时使用was/were able to结构） 请大家注意，如果要体现将来时和完成时，那只能用be able to。 can作为情态动词只有现在时和过去时。,综合上面的几点，我们简单总结一下： can和be able to在表示个人能力时，一般可以进行互

13、换。 can表示“能够做某事”，是未经尝试过的能力； be able to则多表示“有能力做某事”多为已经过事实验证的。 can用于现在时和过去时；而be able to由于有个be动词，所以它时态的使用就灵活了许多，将来时、完成时等时态用be able to表示,则非常清晰方便。 当我们要表示一个动作已经成功的在过去完成的时候，我们必须使用was able to，而不能使用could。,Special difficulties:,含有at的短语： at first 起初=at the beginning at once 立刻=immediately at home 在家=in the house at present 现在=now at last 最后=in the end at