Unit 5 Into the wildLesson 1 （ppt课件） - -2022新外研版（2019）《高中英语》必修第一册.pptx

1、Unit 5 Lesson 1Into the wildPre-reading ILook at the pictures and say the names of the animals.And then choose the animals that migrate.Siberian cranePre-reading IIWords and expressions monarch n.君主，国王 monarch butterfly 黑迈金蝴蝶 annual adj一年一度的，每年的 migration n迁徙 migrate v.移栖，迁徙 seek v.寻找，寻求 professor n

2、.教授 measure v.测量 position n.位置 determine v.确定，决定 determination n.决心 eventually adv.终于，最终in search of搜寻，寻找solution n.解决，解决方法mystery n.难以理解的事物，谜amazing adj.惊人的，了不起的crash v.暴跌destroy v.破坏chemical n.化学品creature n.生物、动物survive v.幸存，活下来manage v.想方设法做.While reading IRead the passage and find out the main i

3、dea.A.The monarchs migration.B.The reasons for monarchs migration.C.Mexicos monarch.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 way to their destination.Where c

4、an you most likely find the passage?In a popular nature magazine introducing the monarch butterfly.In a travel leaflet encouraging people to visit North America.In a scientific research paper about monarch butterflys migration.Complete the sentences with the expressions from the passage.a.The monarc

5、h butterfly is able to tell_.b.Using these two pieces of information,the monarch butterfly determines _.c.The monarch butterfly measures _with its eyes.d.The monarch butterfly reaches _.Key:a.the time of the day b.the way to go c.the position of the sun d.the palces where it will spend in winterGram

6、mar point1.The solution to the mystery of the monarchs amazing ability comes at a time when it is in serious trouble.2.Sadly,human activity is the main reason why the number of monarch butterflies is falling.3.In many of the places where the butterfly can be found,people are destroying the natural e

7、nvironment.4.They cut down trees and use chemicals that kill the plants that monarch caterpillars eat.这四个句子都含有定语从句。在第一句中，when 是关系副词，代替先行词a time；第二句中，why 是关系副词，代替先行词the main reason；第三句中，where 是关系副词，代替the places；第四句中，that 是关系代词，第一个指代chemicals,第二个指代the plants。定语从句用法举例：定语从句用法举例：1.I still remember the ti

8、me when I first became a college student.我还仍然能记得我第一次成为大学生的时候。2.This is the place where we met ten years ago.这是我们十年前见面的地方。3.This is the reason why he suddenly disappeared.这就是他突然消失的原因。4.Where is the book that I bought yesterday?我昨天买的书哪里去了？Exercise 练习1.Id like to live in a town _ there are not too many

9、 cars.2.Winter is the season _ many animals sleep.3.I cant think _ anyone would do that.4.It was so quiet in the mountains _ the bus stopped.5.She told me about a place _ there are thousands of butterflies.6.I wish I knew _ I failed my exams.Key:1.where 2.when 3.why 4.when 5.where 6.whyPost-readingT

10、hink and share.1.What impresses you most about the monarch butterfly?It said,”Its population has crashed by as much as 90 per cent in the last few years”in the text.This gave me a huge shock.It s high time that we should think over about the cause and take measures.2.What can people do to help protect the monarch butterfly?Plant native milkweed species to feed on.Do not use chemicals that kill the plants as much as possible.Protect the natural environment.SummarySummarize what we have learnt today.