高中英语 选必B4U5-Understanding ideas B7U5-Understanding ideas 课件

1、教学教材：外研版高中英语新教材选择性必修4教学内容：Unit 5 Into the Unknown第二课时：Understanding ideas执教人：宋丽娜/北京师范大学南山附属中学Into the unknown理解探索未知话题理解和思考探究探索未知话题表达:探索未知话题starting out 第1课时Using lanaguage 第3课时Listening: The mystery of human brain第4课时Understanding ideasThe Mysteries of the Maya第2课时Developing ideasDiving Deep第5课时Writ

2、ing :The unexplained第6课时Presenting ideas第7课时单元大观念:理解表达探索未知话题，培养学生科学求真的精神，引导学生积极探索未知，加深其对人类命运共同体的认识。Learning ObjectivesBy the end of this period, students will be able to.1. understand the brilliant achievements of Maya civilization, and find out the possible reasons for the decline and disappearance

3、 of Maya civilization;2. perceive the language characteristics of the text, and grasp the structure and context of the text; 3. cultivate truth-seeking spirit and awareness of protecting modern civilization.1. What do you know about these ancient civilizations? They were very popular before the anci

4、ent civilizations suddenly disappeared. 2. What might be the reasons behind their collapse? The destruction of mankind might be the reasons behind their collapse. The Mysteries of The MayaUnderstanding ideasMaya civilisation locationExtending south from parts of what we now know as Mexico into Centr

5、al America Impressive buildings What is most extraordinary about these complex structures is how they were built without the use of wheels, metal tools or even animal power. representative step pyramids The Mayas understanding of mathematics and astronomy was also quite amazing. They applied this un

6、derstanding to the Maya calendar, which was accurate to within 30 seconds per year.Maya calendar On top of all this was an achievement unique in the Americas at that time: a true writing system. It contained more than 800 characters, with some signs representing animals , people and objects and othe

7、rs representing syllables. It was a writing system so complicated that, so far, no one has been able to interpret it completely.Maya writing systemFast-reading*Whats the main idea of the passage?A.William Gadourys new discovery about the Maya civilisation.B.A true writing system that the Maya people

8、 had created.C.Some possible reasons why the Maya civilisation fell down.D.How the Maya civilisation was formed.Choose the topic sentences and write them on the lines to complete the passage.a. Maya civilisation has been surrounded by mystery since its rediscovery in the 19th century.b. But the grea

9、test mystery of all is what caused the Maya to abandon most of their great cities.c. Although his theory has been dismissed by scholars, it shows how powerful the secrets of Ancient Maya civilisation are among people.d. Research also suggests that those natural disasters may have led to the decline

10、of the Maya.e. Meanwhile, the rise and fall of this civilization must also leave us thinking about our own past, present and future.f. Some research seems to indicate that the Maya people themselves may have played a part in their downfall.Task1Check your answers:c abfdeReading for the structureRead

11、 the passage and match the main idea of each paragraph.Para.1 A.Why Maya civilisation collapsed.Para.2 B.A Canadian boy spotted an unknown Maya city buried deep in the jungle.Para.3 C.We should learn from the downfall of the Maya civilisation.Paras.45 D.What caused the Maya to abandon their cities.P

12、ara.6 E.Maya civilisation has been surrounded by mystery.Organise information from the passage and complete the file of Maya civilisation.1. Mexico2. Central America3. natural disasters4. turning wetlands into fields5. digging huge canal systems6. population7. droughts8. lasting for a couple of year

13、sTask21.Canadian William Gadoury spotted an unknown Maya city.2.The secrets of Ancient Maya civilisation are powerful among people.3.The writing system of the Maya was hard to understand.4.The Maya were expert at dealing with disasters.5.By 700 AD , Maya civilisation was at its peak.FTTFTTrue or Fal

14、se Task3Complete the cultural comparison with information from the passage. Comparing the highly-sophisticated civilisations of Maya and Ancient China reveals some surprising similarities. They both possessed a detailed understanding of 1_and astronomy, which helped them maintain an accurate 2_ , an

15、d a complex 3_ that used signs to represent sounds and meanings. It can therefore be difficult to explain why, despite their excellent construction skills, the Maya never learnt to use 4_, while the ancient Chinese did. Facts such as these add to the mystery surrounding Maya civilisation, driving pe

16、ople to find out why it 5_ while others, such as Ancient China, survived and thrived. mathematics calendar writing system wheels, metal tools or even animal power disappearedTask4What is the authors purpose in starting the passage with the story about William Gadoury?What other things do you think c

17、ould destroy a civilisation? Share an example with the class. The story about William Gadoury shows how the secrets of Ancient Maya civilisation have captured peoples imaginations.Think & Share Task5Can we predict our future?Language points1.Based on this, he believed he had spotted an unknown Maya

18、city buried deep in the jungle.据此，他相信自己发现了一座隐藏于丛林深处的未为人所知的玛雅城市的位置。language points：(1)buried deep in the jungle 过去分词短语作后置定语。bury.in.把.埋到.里 be buried in 专心致志于.(2)spot v.认出；弄脏 n.地点；斑点 on the spot 当场；在现场2.What is most extraordinary about these complex structures is how they were built without the use of

19、 wheels, metal tools or even animal power.这些复杂建筑最不同寻常之处在于，在没有使用机轮、金属工具甚至畜力的情况下，玛雅人是如何建造他们的。思考：what和 how分别引导什么从句？what引导主语从句，且在从句中充当主语的成分。how引导表语从句，在从句中作方式状语。Some told tales of_they had helped them survive during bad weather.(限训6)how3.Meanwhile, the rise and fall of this civilization must also leave u

20、s thinking ahout our own past, present and future.同时，玛雅文明的崛起与衰落必定也让我们思考自己的过去、现在与将来。5.Its once-great cities fell into ruin, leaving various mysteries for later people to solve.曾经恢宏的城市沦为废墟，留下各种谜团等待后人解开。leave 的复合结构：leave+宾语+宾补(doing/done/to do/n./adj./adv./介词短语)(1)leave sb/sth doing sth使某人/某物保持.状态Dont

21、leave her_(wait) outside in the rain.(2)leave sb/sth done 表示被动或动作已经完成He got up slowly, leaving the lunch_(finish).(3)leave sb/sth to do 表示让.去做某事，表将来或目的He left me _(do) what he told but I refused his order.(4)leave the window open/ leave the light on/ leave the key at my officewaitingunfinishedto do4

22、.By changing the landscape in this way, it is possible that the Maya people unknowingly reduced their ability to deal with natural disasters.通过这样改变地貌，玛雅人可能在不知不觉中减弱了自己应对自然灾害的能力。思考:that引导什么从句？常见的后面接to do作后置定语的名词？(1)it作形式主语，that引导真正的主语。(2)抽象名词常常用不定式做后置定语，如ability, freedom, chance, choice, opportunity, strength, way, desire 等；此外序数词后也常用to do做定语。6.On top of all this was an achievement unique in the Americas at that time: a