外研版（2019）必修第一册Unit 5 Into the wild Understanding ideas 课件(14张ppt)

(共14张PPT)
5.1
The Monarch’s journey
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相互作用，相互影响，相互交流，相互沟通
西伯利亚的鹤
黑脉金斑蝴蝶
v. 移动，搬迁；使感动，打动
moved 感动的 movining 令人感动的
时期
被称作；被动语态结构：主语+be动词+动词过去分词
para.1
monarch n．君主，国王
para.1
one of +the +adj.最高级+可数名词复数+谓语动词单数
seek (for/after) sb./sth. 寻找/追求某人/某物seek to do sth. 试图做某事；设法做某事seek out 挑选出；找出
Every autumn, millions of these beautiful insects with fine black and orange wings begin a long and difficult journey．
每年秋天，数以百万计的这些有着精致的黑色和橙色翅膀的美丽昆虫，开始了一段漫长而艰难的旅程。
Somehow they manage to travel around 4,000 kilometres south and find their way to California or Mexico．
不知是用什么方法，它们能向南行进4,000公里，找到通往加利福尼亚或墨西哥的路。
However, until recently no one knew how they did this．
然而，直到最近没有人知道它们是如何做到这一点的。
how 引导的宾语从句，作knew的宾语
带有
para.2
用某种方法，不知怎么地
A team of scientists led by Professor Eli Shlizerman at the University of Washington has now found the answer．
由华盛顿大学的伊莱·斯里泽曼教授领导的一组科学家现在已经找到了答案。
They have found out that the monarch is able to tell the time of day．
他们发现黑脉金斑蝶能分辨出时间。
It uses its eyes to measure the position of the sun．
它用眼睛测量太阳的位置。
para.3
团队，小组，工作队
非谓语动词作后置定语，工作队与领导lead是被动关系，所以用led
find-found-found
that引导的宾语从句，作find out 的宾语
v. 量，测量，n.措施，方法，尺度
take measures to do sth.采取措施做某事
to one’s measure依照某人的尺寸 take measures to do sth. 采取措施做某事
名师点津：measure表达“量度为……长/宽/高”时，为连系动词，不用于被动语态和进行时。
These two pieces of information—the time of day and the point where the sun is in the sky—allow the butterfly to determine the way to go．
这两条信息——时间和太阳在天空中的位置——可以让黑脉金斑蝶确定要走的路。
Eventually, it manages to reach the places where it will spend the winter．
最终，它成功到达了过冬的地方。
allow sb. to do sth.
manage to do sth. 设法做某事
where 引导的定语从句
where 引导的定语从句
para.3
at last; finally
determine to do sth.决定做某事(表示动作) be determined to do sth.决心做某事(表示状态) with determination 顽强地；有决心地
The solution to the mystery of the monarch's amazing ability comes at a time when it is in serious trouble．
在黑脉金斑蝶陷入严重困境的时候，人们揭开了它的惊人能力之谜。
Its population has crashed by as much as 90 per cent in the last few years．
在过去的几年里其数量减少了90%。
Sadly, human activity is the main reason why the number of monarch butterflies is falling．
不幸的是，人类活动是黑脉金斑蝶数量下降的主要原因。
para.4
be amazed at/by... 对……感到惊奇be amazed to do sth. 对做某事感到惊奇 to one’s amazement 让某人惊奇的是in amazement 惊奇地
In many of the places where the butterfly can be found, people are destroying the natural environment．
在许多能发现黑脉金斑蝶的地方，人们正在破坏那里的自然环境。
They cut down trees and use chemicals that kill the plants that monarch caterpillars eat．
他们砍伐树木，使用化学品，这些化学品能杀死黑脉金斑蝶幼虫吃的植物。
砍到，缩减，降价
para.4
cut in 插嘴，打断
cut off 切断，阻断，隔绝
cut across\through 抄近路穿过，、径直穿过
The research on the monarch's behaviour has however led to a greater awareness of this creature．
然而，对黑脉金斑蝶行为的研究带来了对这种生物更多的认识。
People have been working together to record its migration and make sure that there are enough plants for it to feed on．
人们一直在共同努力记录它的迁徙，确保它有足够的植物食用。
para.5
If this works, there may come a time when the number of monarch butterflies increases once again．
如果这项工作奏效，可能会迎来一段黑脉金斑蝶数量再次增加的时期。
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．
我们对这种美丽的生物了解得越多，它生存的可能性就越大，并且可以在未来很长一段时间内保持其在自然界中的地位。
survive (from)... 从……存活下来survive on... 靠……维持生计；靠……活下来survive sb. by... 比某人多活……
生存，幸存，比...活的时间长
the+比较级, the+比较级 越....., 越......
The harder you work，the luckier you will be.”常言道：“你越努力工作，你就越幸运
单句表达
①你读的书越多，你就会获得越多的知识。
_________________ you read, __________________ you'll gain．
②情况一天比一天好。
Things are getting __________________ day by day．
③她变得越来越漂亮。
She becomes ________________________．
The more books
the more knowledge
better and better
more and more beautiful
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