2021版外研版必修一英语Unit5 Understanding ideas阅读理解+语言点 ppt课件.ppt

1、Unit 5Unit 5 Activity 1: View the following pictures. Can you use one or two words to describe their action? Animal migration Animal migration refers to the movement of a species (物种物种) from one habitat (栖息地栖息地) to another in response to seasonal changes to the environment. Often covering great dist

2、ances and involving huge numbers of animals, it can be fascinating to observe. Migration happens in all parts of the animal kingdom, from fish and insects to birds, reptiles (爬行动物爬行动物) and mammals (哺乳动物哺乳动物). Why do animals migrate? When do animals migrate? Can human activities influence on animal m

3、igration? How? Look at the pictures and choose the animals that migrate. monarch butterfly Siberian crane /mnk/ /saibirin/ Atlantic salmon red panda /smn/ killer whale African lion The animals that migrate include monarch butterfly, Siberian crane, Atlantic salmon, and some types of killer whales. N

4、ow talk about what you know about animal migration. Now enjoy a video abut Monarch migration. The Monarchs Journey Read the passage and find out what mystery the scientists have solved. The scientists have solved the mystery of how monarch butterflies manage to travel a long distance and find their

5、way to their destination. Choose where you are most likely to find the passage. 1. In a scientific research paper about the monarch butterflys migration. 2. In a popular nature magazine introducing the monarch butterfly. 3. In a travel leaflet encouraging people to visit North America. Why do you ch

6、oose that answer? Look at the mind map of the passage. The Monarchs journey introduction appearance migration trouble solution Complete the sentences with expressions from the passage. Then use the sentences to complete the “cause-effect” flow charts. a. The monarch butterfly is able to tell _. b. U

7、sing these two pieces of information, the monarch butterfly determines _. the time of day the way to go c. The monarch butterfly measures _ with its eyes. d. The monarch butterfly reaches _. the position of the sun the places where it will spend the winter a c b d e. Humans _ trees. f. The _ where m

8、onarchs can be found is destroyed. g. Humans use chemicals that _ that monarch caterpillars eat. h. The monarch butterflys population _ in the last few years. cut down natural environment of many places kill the plants has crashed (by as much as 90 per cent) h e g f 1. What impresses you most about

9、the monarch butterfly? 2. What can people do to help protect the monarch butterfly? Tips: Students can discuss the questions with their group members. Then one student answers the questions, but allow others to add up. 短语短语 1.在一年当中的某些时期在一年当中的某些时期 2. in search of 3. in nature 4. manage to do sth. fin

10、d their way to sp determine the way to go 5. tell the time tell right from wrong 6. the solution to sth 7. in trouble 8. crash / fall by increase to . 9. lead to lead / live a happy life 1. at certain times of the year 2. 为了寻找为了寻找 4. 设法做到设法做到 找到去找到去的路的路 确定要走的路确定要走的路 5. 辨别时间辨别时间 判断对错判断对错 6. 的解决办法的解决办

11、法 8. 下降了下降了 上升到上升到 9. 导致导致 过着幸福的生活过着幸福的生活 7. 处于困境，遭遇麻烦处于困境，遭遇麻烦 3. 在自然界在自然界= in the natural world= in the wild 10. 要是这个起作用要是这个起作用/奏效奏效 11. feed on 12. a long time to come 10. if this works 11. 以以为食为食 12. 未来的很长时间未来的很长时间 找出课文中6 个句子并背诵 1. One of the most wonderful . (Para. 1 ) 2. However , until rencen

12、tly no one .(Para.2 ) 3. They have found out that . (Para.3 ) 4. Its population has crashed by . (Para.4 ) 5. The more we know about this lovely . (Para 5) 1. One of the most wonderful migrations in nature is that of the North American monarch butterfly. one of + 名词复数，谓语动词用单数，名词复数，谓语动词用单数，表表 示“示“中之一

13、”；中之一”； that用来指代前面提到的内容用来指代前面提到的内容，所指代的，所指代的 名词可以是可数名词，也可以是不可数名名词可以是可数名词，也可以是不可数名 词。这一用法可以让句子更加简洁，避免词。这一用法可以让句子更加简洁，避免 重复与累赘。重复与累赘。 【语境应用语境应用】 1) You must notice that one of your (shortcoming) is lack of patience. shortcomings 改写下面一句话，使句子变得更加简洁。改写下面一句话，使句子变得更加简洁。 The population of China is larger th

14、an the population of the UK. that 2. Somehow they manage to travel around 4,000 kilometres south and find their way to California or Mexico. manage to do sth.: to succeed in doing sth., especially sth. difficult 设法干成某事设法干成某事 eg We managed to get to the airport in time. How did you manage to persuade

15、 him? try to do sth.: to make an effort to do sth. 尽力去做某事（成功与否不确定）尽力去做某事（成功与否不确定） A: The problem is quite a challenge for me, although Ive _ my best _ (solve) it. I decide to give it up. B: Dont worry. I can help. A: So glad to hear that. Please do have a try. B: (some time later) Yes. Ive _ (solve)

16、 it. Come here. Let me show you how I worked it out. 【语境应用语境应用】用用manage和和try填写下列对话，填写下列对话， 体会二者的区别。体会二者的区别。 tried to solve managed to solve 3. The solution to the mystery of the monarchs amazing ability comes at a time when it is in serious trouble. the solution to sth. 的解决方法的解决方法 常见的用介词常见的用介词to的短语有

17、：的短语有： the key to sth. 的钥匙的钥匙/关键所在关键所在 the answer to sth. 的答案的答案 the way to sth. 的方法的方法/道路道路 in (serious) trouble 为固定搭配为固定搭配，意为，意为in an unpleasant, difficult or dangerous situation。 eg He is in serious trouble and needs my help. 类似的“类似的“in+抽象名词抽象名词” 短语有：短语有： in danger, in debt (处于负债中处于负债中), in doubt

18、, in need, in peace, in silence, in shock等等 4. Its population has crashed by as much as 90 per cent in the last few years. population 人口，人口数量，作主语时谓人口，人口数量，作主语时谓 语动词单复数根据意思来定。语动词单复数根据意思来定。提问人口数提问人口数 量多少时只能用量多少时只能用what，不能用，不能用how many。 eg The population is increasing at about 6% per year. (population当

19、做整体当做整体) One third of the worlds population consume two thirds of the resources. Whats the population of China? crash v. 暴跌暴跌 eg Share prices crashed to an all-time low (前前 所未有的低记录所未有的低记录) yesterday. 【拓展拓展】 crash v. 碰撞，撞击；溃败，惨败碰撞，撞击；溃败，惨败 eg A track went out of control and crashed into the back of a

20、 bus. I crashed completely in the first round. crash n. 碰撞；碰撞声；暴跌；失败；奔溃碰撞；碰撞声；暴跌；失败；奔溃 【语境应用语境应用】指出下列句子中指出下列句子中crash的意思和的意思和 词性。词性。 1) The tree fell with a great crash. 2) Files can be lost if the system suddenly crashes. 3) A girl was serious hurt in the yesterdays car crash. 4) She went out of the

21、 room angrily and crashed the door heavily behind her. n. 破裂声破裂声 v. 奔溃奔溃 n. 撞车撞车 v. 猛撞，碰撞猛撞，碰撞 5. Sadly, human activity is the main reason why the number of monarch butterflies is falling. the number of 意为“意为“的数量”，的数量”，中心词中心词 是是number, 在句中作主语时在句中作主语时谓语动词用单数谓语动词用单数。 【拓展拓展】 a number of +名词复数，意为“许多，大名词

22、复数，意为“许多，大 量”，量”，可用可用large或或small来修饰。作主语时，来修饰。作主语时， 谓语动词用复数谓语动词用复数。 6. The more we know about this lovely creature, the greater the chance it will survive and keep its place in the natural world for a long time to come. the +比较级比较级 , the +比较级比较级 是固是固 定搭配，用来表示“越定搭配，用来表示“越.越越” eg The more I know him,

23、the more I like him. The harder you work, the luckier you will be. 【拓展拓展】 对比另一种形容词对比另一种形容词/副词比较级用法：副词比较级用法： 比较级比较级+ and +比较级，意为“越来越比较级，意为“越来越” eg China is becoming stronger and stronger. 【语境应用语境应用】翻译下列句子。翻译下列句子。 1) 中国人民的生活越来越好。中国人民的生活越来越好。 2) 我对这个城市了解的越多，就越喜欢它。我对这个城市了解的越多，就越喜欢它。 The lives of Chinese

24、 are better and better. The more I know about the city, the more I love it. 7. survive v. 活下来，幸存活下来，幸存 1) Of the six people injured in the crash, only two survived. 2) The company managed to survive the economic crisis. 3) She survived her husband by ten years. 4) I cant survive on 400 yuan a month. 【语境应用语境应用】指出下列句子中指出下列句子中survive的意思。的意思。 存活，活下来存活，活下来 幸存，渡过难关幸存，渡过难关 比比活的时间长活的时间长 生存，活下来生存，活下来 Thank you!