资源简介

(共24张PPT)
Unit 5 Looking into nature
Developing ideas
Learning Objectives
1主题目标:学生能够了解自然的未解之谜，保持对自然的好奇心。
2结果产出:学生完成一小段对话，话题为an unsolved secret of nature.
3 评价标准:
(1)学生能够描述自然中的一个未解之谜。
(2)学生能够给出可能的解释。
(3)学生能够尽可能多地使用之前板块和本板块的核心词汇，以及学生用书Useful expressions中的表达。
(4)学生能够正确使用关于talking about possibilities的表达。
What do you see in these pictures
Have you heard of them before
Which one interests you the most Why
Look at some pictures about unsolved secrets and guess what they are.
Nature is full of secrets. They are waiting to be explained. These include black holes, the begining of the universe, the Loch Ness Monster and Bigfoot. These secrets awaken our curiosity and drive scientists to better understand the wonders around us.
Read and match.
the black hole
黑洞
the Bigfoot
大脚野人
the Loch Ness Monster
尼斯湖水怪
the beginning of
the universe
宇宙起源
背景提示:沸腾河
沸腾河(the boiling river)位于亚马孙雨林深处，是世界上极为罕见的自然奇观之一。其平均水温高达86°C，足以致命。沸腾河的传说最初与黄金失落之城的故事交织在一起，许多科学家曾认为这仅仅是神话。直到地热科学家安德烈斯·鲁佐(Andres Ruzo)深入雨林实地考察，才证实了沸腾河的存在并展开系统研究。令人惊讶的是，沸腾河的形成并非源于火山活动。其奥秘在于地下深处的地热能通过特殊的地质结构，将高温水源源不断地输送到地表，从而造就了这条奇特的炽热河流。目前，沸腾河具体的地质机制尚未完全揭示，堪称自然界的一大未解之谜。它不仅挑战着人们对地球科学的既有认知，也时刻提醒着我们:自然界仍蕴藏着无穷的奥秘，等待人类去探索。
1.Listen to the talk and choose the correct topic .
a. A disappearing river in South America.
b. The life of the people in the Amazon rainforest.
c. A boiling river in the Amazon rainforest.
record a world record / record the temperature
produce fresh produce / produce oxygen
perfect a perfect gift / perfect her skills
desert the biggest desert on earth / desert his duty
Listen and repeat.
/ rek d/
/r k d/
/ pr dju s/
/pr dju s/
/ p f kt/
/p fekt/
/ dez t/
/d z t/
What information should you listen for
facts about the river
people’s activities
the speaker’s opinion
Read and think.
86
cook
tea
heavy rain
amazing wonders
2.Listen again and complete the profile.
What’s the speaker’s opinion
What is the conversation mainly about
How the boiling river came into being.
Read and say.
3.Listen to the conversation and complete the table.
sunshine
heat the river
becomes hot
700 kilometres
in the water
produce
possible
research
Listen again and talk about how the speakers discuss possibilities.
Focus on words like “could” “might” “maybe” and “perhaps” and structures like “It’s certain that... ” and “It’s possible that...”.
Sample
4.Work in pairs. Choose one unsolved secret of nature and talk about possible explanations.
Atlantis亚特兰蒂斯
Crop circles麦田怪圈
Grammar
宾语从句(1)
1.定义和构成
宾语从句是英语中用来充当宾语的句子宾语从句一般由“引导词十主语十谓语十其他”构成，语序要用陈述句语序。
2.that引导的宾语从句
that引导的宾语从句用来陈述事实，that本身无词义，在从句中不作任何成分，在口语中常常省略。但是如果有两个并列的宾语从句，第二个从句的引导词that不能省略。
例如:
He said (that) the book was veryinteresting and that (不能省 略)
all thechildren liked to read it.他说那本书很有趣，所有的小朋友都喜欢看。
(1)主句的谓语动词是表示肯定的概念， believe, expect, explain, feel, forget,guess, hear, hope,imagine, know, prefer,promise, remember, report, say, see, tell,think,understand,warn,wish 等时,其后面的宾语从句一般用that引导。
例如:
I hope (that) he will be fine soon. 我希望他很快好起来。
He said (that) he didn't like music. 说他不喜欢音乐。
(2)主句由“连系动词十形容词”构成的“系表”结构，常接that引导的宾语从句。这类形容词多表示感情，如afraid,certain，
sure,surprised 等。
例如:
glad, happy, pleased, sad, satisfied, sorry,
I'm afraid (that) he can't come.恐怕他不能来了。
We are all pleased (that) you can come.
你们能来我们都很高兴。
3.由whether或if引导的宾语从句
whether,if 都意为“是否”，当宾语从句要表达不肯定或疑问的概念时，从句由whether或if来引导,不能用that。whether 和if在从句中不可省略。
例如: I don' t know whether/if he will help me.我不知道他是否会帮助我。
【注意】一般情况下,if和 whether 可以互换，但以下3种情况只能用whether:
(1)在不定式之前。
例如:
We don’t decide whether to go toBeijing or not.我们还没决定是否去北京。
(2)在介词之后。
例如: It depends on whether you want to do it.
这取决于你是否想去做这件事。
(3)与or not连用表示选择意义时。
例如: They are talking about whether to buy acar or not.
他们正在讨论是否买一辆小汽车。
针对训练
用 that, if, whether 填空。
(1)I think he will come back soon.
(2) She wonders the movie is interesting.
(3)The teacher said the earth goes around the sun.
that
if/whether
that
You mind map should cover the functions of conjunctions and structures.
Draw a grammar mind map of object clauses in groups.
1. Summarise phrase patterns for expressing opinions and possibilities. (Required)
2. Complete a report on an unsolved mystery of nature, including: facts, possibilities, and evidence. You can draw some pictures as well. (Optional)
Homework
Thank you !

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