Unit4SectionB 2a-4c 课件 2025-2026学年人教版英语八年级下册

该初中英语课件围绕“自然奇观”主题，涵盖词汇（如ocean、reef）、描述性语言（数字、形容词、副词）及广告写作等核心知识点。通过反义词匹配、How句型练习、短文填空搭建学习支架，衔接大堡礁广告阅读分析与青海湖广告写作任务，形成“词汇-句型-阅读-写作”的递进脉络。 其亮点在于以“输入-内化-输出”为主线，通过大堡礁广告圈划数字、标注形容词培养语言能力，小组合作制作亚马逊雨林海报与报告提升思维品质和学习能力，写作指导结合评价表助力精准表达。既帮助学生掌握自然奇观的描述方法，也为教师提供系统的分层教学资源，提升课堂效率。

SectionB (2a-4c) understand the advertisement about the Great Barrier Reef and identify its numbers, adjectives, and adverbs. be able to write an advertisement for Qinghai Lake or another natural wonder. know the pronunciations, spellings, and meanings of words and phrases like ocean, reef, largest, colourful, deeper... In this part, you will 2a Match the words on the left with their opposites on the right. P38 A B C D E F G H 1. ____________________________________ 4. ____________________________________ 2. ____________________________________ 5. ____________________________________ 3. ____________________________________ 6. ____________________________________ 2b Read the examples and pay attention to the words in blue. P38 How far is it from your home to school? How heavy is a blue whale? How large is your country? How often do you exercise? long high deep low fast soon How long is the Great Wall? How high is Mount Qomolangma? How deep is the Mariana Trench? How low is the temperature in winter? How fast can a zebra run? How soon will you finish your homework? Make more sentences using how and the words in the box. 2c Complete the passage with the correct forms of the words in the box. deep environment 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 very cold for most of the year. But over 1,200 different types of animals can still ________ in this ___________. Today, the lake still attracts many curious travellers. After all, it is a great natural ________! P38 deepest dive surface survive environment wonder What can you see in the picture? We can see colorful corals and many types of fish. What place is shown in the picture? 3a Read the advertisement. Circle the numbers and underline the adjectives and adverbs used to describe the Great Barrier Reef. P39 Tips: 数字可以量化细节，让描述具体可信。形容词用来描绘特征，激发情感共鸣。副词可以修饰程度/动作，增强画面感。 Read the text again and find out the following details. What Where Special fact Things to do 3b Read a student’s notes on Qinghai Lake. Rewrite them in full sentences. P39 1. Qinghai Lake is a ________ in ______________________. 2. Qinghai Lake is ______________ in China. 3. It is ___________ in size. 4. If you visit Qinghai Lake, you can ____________________ _________________________________________________. salt lake Qinghai Province, China the largest lake 4,340 km² photograph wildlife (fish and birds), visit islands, and ride a bike or horse 3c Write an advertisement for Qinghai Lake or another natural wonder. Describe it and explain why people should visit it. Try to make your advertisement as persuasive as possible. P39 写作指导 审主题： 为青海湖或另一自然奇观撰写广告，描述其特色并说明游览理由，力求有说服力。 审时态： 一般现在时 审人称： 1. 清晰描述自然奇观的核心特征（如青海湖的盐湖属性、规模、景观等）。 2. 阐述游览价值（如独特体验、生态意义、视觉享受等）。 3. 运用生动的形容词、副词和关键数字增强说服力，结尾呼吁读者前来游览。 以第二人称（吸引读者）和第三人称为主 审要点： Qinghai Lake: A Wonderful Salt Lake in China Do you want a natural place with great beauty and special experiences? Come to Qinghai Lake! It is a beautiful salt lake in Qinghai Province, China. As the largest lake in China, it covers 4,340 square kilometers. Just imagine: a big blue lake stretching far, with snow-covered mountains and golden grasslands around it. That’s what you’ll see at Qinghai Lake. There are many fun things to do here. You can take photos of different animals like colorful fish and groups of birds. Visit its nice islands, or ride a bike or horse on the big grasslands near the lake. If you love nature, enjoy taking photos, or just want a calm place to relax, Qinghai Lake will give you a trip you’ll never forget. Come and see why it’s a real treasure in China’s natural world! Share your passage with other members in your group. Then, check each other's passage by using the checklist (评价表).  Does the writer introduce Qinghai Lake or another natural wonder clearly?  Does the writer use persuasive language (adjectives, adverbs, numbers) to describe its features?  Does the writer explain why people should visit it?  Are there any spelling or punctuation (标点符号) errors?  Does the writer use correct tenses? 2c Complete the passage with the correct forms of the words in the box. deep environment 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 very cold for most of the year. But over 1,200 different types of animals can still ________ in this ___________. Today, the lake still attracts many curious travellers. After all, it is a great natural ________! P38 deepest dive surface survive environment wonder 4a Work in a group. Choose a natural wonder (a river, lake, mountain, forest, waterfall, etc.). Then do some research and make notes. name location and size plants and animals special facts P40 P40 4b Make a poster about the natural wonder you chose. Refer to the example on the right. name size location plants and animals special facts some pictures 4c As a group, give a report to the class. Pay attention to the use of large numbers, comparatives, and superlatives. The Amazon Rainforest is the world's biggest rainforest. It covers 5.5 million square kilometres. You can see most of it in three countries, Brazil, Peru, and Colombia ... P40 Reflecting 1. What new facts about natural wonders have you learnt? 2. Can you make comparisons when talking about natural wonders? 3. Can you use large numbers to give some geography facts? 4. Can you explain how and why people connect with nature? 5. What are some achievements that people have made while exploring nature? P40 ? BIG Question How do we connect with nature? What is amazing about nature? Why do we explore nature? Nature makes us wonder. That is why it is wonderful. Basic: Polish your writing. Extended: Research another natural wonder and make a poster to introduce it. Then share it with your classmates. $