Unit 4 Section B 2a-2d 课件 2025-2026学年人教版八年级英语下册

保护动物 从我做起 Section B (2a-2c) The Wonders of Nature Unit 4 Learning Objectives 能够梳理本单元中出现的反义词,掌握利用反义词对照的方法理解和记忆单词的策略。能够掌握 “How + adj./adv.” 结构,并学会使用该结构询问数量、频率、速度等。 能够通过语篇练习词汇,并通过大数字和形容词的比较级别了解贝加尔湖。 能够结合本单元主题,按照自然奇观、地貌特征、描述性形容词和副词、人类探索自然的活动等语义类别梳理单元话题词汇。 Antonyms are words that have opposite meanings. 2a 1._ below 5. _ top 2._ common 6. _ northern 3._ low 7. _ risky 4._ dead 8. _ survive A. safe E. unusual B. bottom F. living C. southern G. high D. above H. die D E G F B C A H / r ski/ adj. 有危险的;有风险的 / s n/ adj. 在南方的;向南的 在...下面 常见的 低的 死的 顶部 北部的 存活 adj.有危险的 在...上面 安全的 底部 不寻常的 活着的 高的 死去 adj.南部的 below common low dead top northern risky survive above unusual high living bottom southern safe die adj. adv. v. prep. n. common — unusual; low — high; dead — living; northern — southern; risky — safe low — high; below — above survive — die below — above top — bottom below above common unusual low high dead living top bottom northern southern risky safe survive die Can you add more antonyms? deep shallow long short rise fall appear disappear harm protect failure success remain change lastly firstly Write down as many pairs as you can and share. Brainstorm 5 1. It is _ to wait for the traffic light to turn red, but it is _ to walk across the road without looking. safe risky 2. Seeing a cat in the street is very _, but seeing a wild tiger there is _. common unusual 3. The kite is _ the clouds, and the bridge is _ the river. above below 4. Without sunlight and water, plants cannot _, they will _. survive die 5. The _ of the mountain is covered with snow, while the _ is full of green trees. top bottom 6. This area has a _ climate, but its _ part is much warmer. northern southern 7. The temperature is very _ in winter, but it becomes _ in summer. high low 8. The _ leaves fall to the ground, and _ plants keep growing in spring. dead living Think and share 1. How far is it from your home to school? 2. How heavy is a blue whale? 3. How large is our country? 4. How often do you exercise? It’s about 2 kilometers from my home to school. A blue whale weighs about 150 tons. Our country is about 9.6 million square kilometers in size. I exercise three or four times a week. What do these questions ask about? 询问路程或距离 Distance 询问重量Weight 询问面积或规模Size 询问重量Frequency Can you find the entence pattern? Sentence pattern: How + adj./adv. ... ? 问动作的细节:方式/频率 问人或物的属性、感受或状况 + adj. + be + subject? How + adv. + do(助) + subject + v.? 注意:How后接的单词均为形容词或副词,即“How +adj./ adv.”。 long high deep old fast soon How long is the Yangtze River? How deep can Fendouzhe dive? How fast can the animal run? How high is Mount Qomolangma? How old is the desert? How soon can we get there? 1. 3. 5. 2. 4. 6. 2b Read the examples and make more sentences using how and the words in the box. Sentence pattern: How + adj./adv. ... ? How far is it from your home to school? How heavy is a blue whale? How large is our country? How often do you exercise? It’s about 6,300 kilometers long. It’s 8,848.86 meters high. It can dive to about 10,909 meters deep. It’s about 100 years old. They can run as fast as 112 kilometers per hour. We can arrive in 10 minutes. Ask and answer these questions. 9 Language Points 1. How far is it from your home to school? 从你家到学校有多远? 辨析:how far, how long, how often与how soon how far 多远 问距离 答语是表距离的数量 how long 多久 问时间段 用"for+一段时间"或"since+时间点"来回答 多长 问物体的长度 答语"基数词+ metre(s) / kilometre(s)... + long" how often 多久一次 问频率 答语"once/twice...+时间段",always, often等频度副词(短语) how soon 多久以后 对"in+时间段"提问,常用于一般将来时的句子中 答语"in+时间段" 10 Language Points 1. How far is it from your home to school? 从你家到学校有多远? 辨析:how far, how long, how often与how soon -从这里到你家有多远? -大约3千米。 -How far is it from here to your home? -About three kilometres. -这根木棍有多长? -大约两米。 -How long is the stick? -About two metres. -你姐姐将在这里待多长时间? -10个月。 -How long will your sister stay here? -For ten months. -你多久吃一次印度食物? -几乎不吃。 -How often do you have Indian food? -Hardly ever. -李先生多久以后回来? -一周以后。 -How soon will Mr Li come back? -In a week. What are the pictures about? What do you know about Lake baikal? They are about Lake Baikal. Look and share Location Size Depth ... ? /ba k l/ 2c Complete the passage with the correct forms of the words in the box. deep survive wonderful surface dive Located in Siberia, Russia, Lake Baikal is one of the world’s most famous lakes. It is the _ freshwater lake in the world. To reach the bottom, you must _ 1,620 metres! It is also larger than most other lakes. Its _ covers 31,500 square kilometres. That is bigger than the country of Belgium! Lake Baikal is cold most of the year. But over 1,200 different types of animals can still _ in this environment. Today, the lake still attracts many curious travellers. After all, it is a great natural _! Tip: Decide the part of speech for each blank. It makes the task easier superlative adj. v. n. n. v. adj. v. adj. n. v. Complete the passage with the correct forms of the words in the box. deep survive wonderful surface dive Located in Siberia, Russia, Lake Baikal is one of the world's most famous lakes. It is the _ freshwater lake in the world. To reach the bottom, you must _ 1,620 metres! It is also larger than most other lakes. Its _ covers 31,500 square kilometres. That is bigger than the country of Belgium! Lake Baikal is cold most of the year. But over 1,200 different types of animals can still _ in this environment. Today, the lake still attracts many curious travellers. After all, it is a great natural _! deepest dive surface survive wonder adj.位于 西伯利亚 贝加尔湖 adj.淡水的 saltwater 咸水的 比利时 n.种类 v.吸引 adj.好奇的 n.旅行者 adj.自然的 artificial 人造的 2c 1. How deep is Lake Baikal? 2. How large is it? It is 1,620 metres deep. Its surface covers 31,500 square kilometres. It is about 31,500 square kilometres in size. / It is larger than Belgium. 3. What did the passage compare Lake Baikal with? Why? 4. Why do you think many travellers visit Lake Baikal? It compared Lake Baikal with Belgium. Because it wants to show how large Lake Baikal is. . Because it is a great natural wonder and it attracts many travelers. Where: What: Surface: Climate: Animals: Siberia, Russia the deepest freshwater lake in the world (1,620 m) 31,500 square kilometres cold most of the year over 1,200 different types Lake Baikal Read the text and match the new words with their meanings. a similar group of things or people be in a place water that is not salty from nature, not made by people make someone interested in something wanting to know something more someone who travels from place to place locate freshwater type attract curious traveller natural New words Meaning / l ke t/ / fre w t (r)/ / ta p/ / tr kt/ / kj ri s/ / tr v l (r)/ / n t ( )r l/ Discuss 1. Do you want to visit Lake Baikal? Why or why not? Yes, I do. Because it is a great and amazing natural wonder. I want to enjoy its beautiful scenery and clean fresh water. 2. What do you think is the most special thing about Lake Baikal? 3. If you could travel there, what would you like to do? 4. Why should we love and protect natural wonders like Lake Baikal? It is the deepest freshwater lake in the world. And it is so large and beautiful. I would take photos, enjoy the clean water and the wonderful nature. I also want to learn more about it. Because natural wonders are special and valuable. They are our natural heritage. We should protect them so that people today and the next generations can still enjoy their beauty. It is our duty to love and protect them. Enjoy nature Protect nature Respect nature Group Work: Create Your Own Natural Wonder Grouping: Work in groups of 3-4 students. Task List: 1. Naming: Give your natural wonder a special name. 2. Describing: Use three "How...?" sentences to describe its features (e.g., depth, height, age). 3. Drawing : Draw a simple sketch of your wonder. 4. Promising : Write one sentence about protecting your wonder. 5. Show and explain your natural wonder briefly. Tools: market pen paper pencil eraser ruler Located in Siberia, Russia, Lake Baikal is one of the world’s most famous lakes. It is the deepest freshwater lake in the world. To reach the bottom, you must dive 1,620 metres! It is also larger than most other lakes. Its surface covers 31,500 square kilometres. That is bigger than the country of Belgium! Lake Baikal is cold most of the year. But over 1,200 different types of animals can still survive in this environment. Today, the lake still attracts many curious travellers. After all, it is a great natural wonder! be located in … 位于…;坐落在… 世界上最著名的湖泊之一 淡水湖 到达底部 cover … square kilometres 覆盖…平方公里 比利时这个国家 一年中的大部分时间 不同种类的动物 在这种环境中 吸引许多好奇的旅行者 一处伟大的自然奇观 Learn and take notes 教材 P38 2c 1. Located in Siberia, Russia, Lake Baikal is one of the world's most famous lakes.贝加尔湖位于俄罗斯的西伯利亚地区,是世界上最著名的湖泊之一。 located located adj. 位于;坐落在(不作定语) be located at/in /on 位于...... 拓展:locate v. 找出 的准确位置;确定 的准确地点 location n. 位置;地点 It's a small town located 30 kilometres south of Beijing. 那是个位于北京以南30千米的小镇。 The supermarket _the centre of town. 这家超市位于镇中心。 The new library is _ (locate) in the centre of the campus, next to the teaching building. is located in Language points 23 Language points 教材 P38 2c 2. After all, it is a great natural wonder! 毕竟,它是一处壮阔的自然奇观! natural adj. ① 自然的;天然的(作定语。) ② 天生的;本能的 ③ 正常的 句型: It’s natural (for sb.) to do sth. natural resources/beauty/environment 自然资源/美景/环境 拓展: nature(名词) 大自然; naturally【副词】自然地 e.g. We should protect the natural resources. 我们应该保护自然资源。 It's natural for people to wonder and worry about opinions of others. 好奇和在意别人的想法是人的天性。(威海中考) e.g. Nature gives people long-term happiness. 大自然给予人们长久的快乐。(2025云南中考) e.g. Naturally enough, she wanted her child to grow up fit and strong. 很自然,她希望自己的孩子健康茁壮地成长。 We can enjoy the natural beauty in the mountains. 我们可以欣赏大山里的自然美景。 24 【语境应用】选择natural的汉语意思 A. 本能的 B. 自然的 C. 未经加工的 (1) There are lots of natural disasters (灾害) this year. _ (2) This juice is 100% natural. _ (3) It's natural to worry about your parents. _ B C A 1._ (nature) resources are important and we should use them wisely. 2. We should try to protect _ (natural) and live in harmony with it. 3.She has practiced the piano for years, so she plays it _ (natural) in front of the audience. Natural nature naturally Language Points 3. Its surface covers 31, 500 square kilometres. 它的表面面积达31 500平方千米。 cover ① 动词 占(一片面积) cover an area of.. 占地面积为… ② 动词 覆盖,掩盖 cover...with sth 用某物把…覆盖;be covered with 被…覆盖 ③ 动词 包括,涉及 ④ 名词 封面;盖子 1.It covers an area of 14, 100 square kilometres. 它占地14100平方千米。 2.She _ the fruit salad _ a bowl. 她用碗把水果沙拉盖上了。 3.The ground was covered with snow. 大地被雪覆盖。 4.The book covers five units. 这本书包括五个单元。 5.The book has a blue cover. 这本书有一个蓝色的封面。 covered with Language Points 5. But over 1, 200 different types of animals can still survive in this environment. 但仍有1200多种不同种类的动物能在这样的环境中生存。 type(名词) 类型;种类= kind(种类)。 a type/kind of.. 一类/种……; different types/kinds of 不同种类的…… I like this type of book.我喜欢这一类书。 What type of house do you prefer to live in?你更喜欢住哪一类房子? There are many different types/kinds of music.有许多不同类型的音乐。 Today, the lake still attracts many curious travellers. 如今,这座湖泊仍然吸引着许多好奇的游客。 attract v. 吸引,招引,引起(反应) attract sb to... 吸引某人到… attract the attention of ... 吸引…的注意 ==>attraction n. 吸引;有吸引力的事物 tourist attraction 旅游景点 Mr Smith tried to _ all the students’ _ to his class. 史密斯老师在他的课堂上尝试吸引所有学生的注意力。 She tried to attract the attention of the waiter. 她试图引起服务员的注意。 The West Lake attracts thousands of visitors to Hangzhou every year. 西湖每年吸引成千上万的游客来到杭州。 attract attention Language Points 6. Today, the lake still attracts many curious travellers. 如今,这个湖仍然吸引着许多好奇的游客。 (2) curious(形) 好奇的;求知欲强的 定语或表语 be curious about 对…感到好奇; be curious to do sth 对做某事感到好奇,很想做某事 ==> curiosity (名)好奇心;求知欲 curiously [副词]好奇地 1.The little boy looked at the magic box _ (curious), wondering what was inside. 2.Her _ (curious) made her open the door and walk into the room. 3.孩子们总是对自然界的一切事物感到好奇。 Children are always _ _ everything in nature. curiousity curious about curiously 1._(nature) resources are important for us. And we should use them wisely. 2.The little boy was _(curiosity) about how the clock worked, so he took it apart carefully. 3.As _(travel), we should remember: When in Rome, do as the Romans do. 4.It’s _(risk) to cross the road without looking both ways first. 5.We saw many_(type) of colourful fish swimming happily in the clear stream yesterday. Natural curious travellers risky types I. 用括号内所给词的适当形式填空。 Exercises II. 根据汉语提示完成句子。 1. 经过长时间的攀登,他们终于到达了山顶。 They finally _ _ _ of the mountain after a long climb. 2. 汤姆对这台机器的工作原理很好奇。 Tom _ _ _ how the machine works. 3. 坐落于湖南湘西土家族苗族自治州,凤凰古城是一座历史悠久的古镇。 _ _ Tujia-Miao Autonomous Prefecture of Xiangxi, Hunan, the Ancient Town of Fenghuang is a historic town with a long history. 4.位于新疆北部的城市阿勒泰吸引了人们的目光。 Altay, a city in northern Xinjiang, _ _ _. Located in reached the top is curious about attract people’s attention 常见的“长/宽/高/深”等的表达 1.— _ is the mountain? —It’s about 2,000 metres high. How high 2.— _ is the elephant? —About 5,000 kilos. How heavy 3.— _ is your house? —It’s about 80 square metres in size. How large 4.— _ is this red rope in your hand? —It’s about two metres long. How long 32 Homework 选择课文中提到的一个自然奇观(如 Lake Baikal),再找一个你知道的中国自然奇观(如 黄山、九寨沟),写五个句子进行对比。 Must-do Choose-to-do 1. 在课本上找出更多反义词组,整理成清单。 2.用自己的话复述2c贝加尔湖语篇,不少于5句话,必须用到: deepest, surface, survive, wonder 。 Lavf59.14.100 $