Unit 4 Section A (1a～1d)课件2025-2026学年人教版英语八年级下册

Unit 4 The Wonders of Nature Section A (1a~1d) 能正确认读关于自然奇观的地理类词汇（如waterfall, desert, trench等），感知描述自然景观特征的词汇用法（如level, surface, depth等）。 通过听力捕捉、对话练习，获取文本中自然奇观的维度、规模等关键信息，归纳并内化用大数描述事物特征、问答自然奇观相关信息的常用表达（如...is the highest in the world, It’s...metres high/deep）。 能运用本课时的目标语言分享自己熟知的自然奇观。 01 02 03 学习目标 1.Do you know the name of the waterfall in the photo? The waterfall in the photo is Victoria Falls. It is one of the world’s largest waterfalls, known for its massive spray and roar. 2.What do you think is special about it? 3.What other natural wonders do you know? Examples: the Grand Canyon, the Great Barrier Reef, Mount Everest. Look and share Let’s enjoy some natural wonders of the world. Lead in Match the places with the pictures. _____ Nile River _____ Angel Falls _____ Mount Qomolangma _____ Dead Sea _____ Sahara Desert _____ Mariana Trench F A D C E B 世界最长河流 世界最高瀑布 世界最高峰 世界海拔最低湖泊 世界最大沙漠 世界最深海沟 1a Pre-listening Read these words. wonder n.奇观；惊叹 v.琢磨；想知道 measurement n.数量；测量 square kilometre 平方干米 below prep.在......下面；低于 adv.在(或到)......下面 level n.高度；水平；程度 surface n. 表面；表层 Nile River 尼罗河 Angel Falls 天使瀑布 Mount Qomolangma 珠穆朗玛峰 Dead Sea 死海 Sahara Desert 撒哈拉沙漠 Mariana Trench 马里亚纳海沟 Listen to the game show. Complete the descriptions of the places. Place Description Mount Qomolangma the _______________in the world Sahara Desert the _______________in the world Dead Sea the _______________on earth Mariana Trench the _______________in the ocean 听力技巧：听主旨，抓描述性最高级词汇（ highest , largest...） highest mountain biggest desert lowest place deepest point While-listening 1b 最高级 (superlatives) “highest” is the superlative of “high” “biggest” is the superlative of “big” “lowest” is the superlative of “low” “deepest” is the superlative of “deep” 形容词 / 副词最高级变化规则 high— highest low — lowest deep —deepest 一般情况下，在词尾加-est large — largest fine — finest 以不发音字母e结尾的词，在词尾加-st heavy — heaviest easy — easiest early — earliest 以“辅音字母 + y”结尾的双音节词，先把y改为 i ,再加-est 形容词 / 副词最高级变化规则 big — biggest fat — fattest thin — thinnest 重读闭音节词词尾只有一个辅音字母时，先双写该辅音字母，再加-est beautiful — most beautiful interesting — most interesting delicious — most delicious 多音节词和部分双音节词在词前加most 不规则变化 原级 最高级 good / well best bad / badly worst many / much most little least far farthest furthest Good, Better, Best Good, better, best, Never let it rest, Till good be better, And better best. Bad, worse, worst, Never fight against, Get better and better, And you’ll be the best. Try to read the following numbers. 英语数字的读法 416 8,848.86 11,000 9,000,000 英语中，数字从后往前数，每三位标一个逗号。 例： 9,000,000 百位和十位中间加and 小数点读作point, 小数点后的数字逐个单独读出。 thousand million 1c Listen again. Complete the measurements. Place Measurement Mount Qomolangma ________metres high Sahara Desert about ________square kilometres in size Dead Sea ________metres below sea level Mariana Trench about________metres deep 8,848.86 9,000,000 416 11,000 听力技巧：精听，边听边记录关键数据。 1c Listen to the script and check your answers. Then role-play the conversations. Host: Welcome to our game show! Today, it’s all about geography. Answer as quickly as you can! Question one: What is the highest mountain in the world? Fu Xing: It’s Mount Qomolangma! Host: Correct! How high is it? Liu Hongyu: I know this—it’s 8,848.43 metres high. Host: No, sorry. Fu Xing? Fu Xing: Is it 8,848.86 metres? Host: Yes! But some scientists say Qomolangma is still growing taller! Now, name the biggest desert in the world. Fu Xing: The Taklimakan Desert? Host: Wrong! Ella? Ella: It’s the Sahara Desert. Host: Right! Now, how big is it? Ella: It’s about 9,000,000 square kilometres. Host: That’s right! What’s the lowest place on earth? Liu Hongyu: It’s the Dead Sea! Host: Well done! Its surface is 416 metres below sea level. Now where’s the deepest point in the ocean? Fu Xing: It’s in the Mariana Trench. Host: That’s correct! How deep is it? Fu Xing: It’s about 11,000 metres deep. Host: Correct! Talk about the places you have learnt about. For example: A: What’s the highest mountain in the world? B: It’s Mount Qomolangma. A: How high is it? B: It’s 8,848.86 metres high. Post-listening 1d 1. The Wonders of Nature 自然奇观 wonder 作名词，意为“奇迹；奇观；惊奇”。 The Great Wall is one of the wonders of the world. 长城是世界奇观之一。 wonder 的相关短语： (1) in wonder 惊奇地 The children looked at the fireworks in wonder. 孩子们惊奇地看着烟花。 (2) no wonder 难怪；不足为奇 No wonder you’re tired, you’ve been working all day. 难怪你累了，你一整天都在工作。 【拓展】wonder 还可作动词，意为“想知道”。 I wonder who he is. 我想知道他是谁。 Language points 2. ... below sea level ……海平面以下 below 作介词，意为“在……下面；低于；少于”。 There is a beautiful garden below our window. 在我们窗户下面有一个漂亮的花园。 The sun sank below the horizon. 太阳落到了地平线以下。 His score on the test was below 60. 他这次考试的分数低于60分。 【拓展】below 还可作副词，意为“在(或到)下面” 。 Look at the picture below. 看下面的图片。 【辨析】below与under below 不一定表示垂直的下方，主要强调位置低于某物。 反义词为above under 通常表示在某物的正下方，有垂直在下的意思， 还可表示“覆盖；隐藏”等含义。反义词为over There are some flowers below the balcony. 阳台下面有一些花。 The ball is under the table. 球在桌子的下方。 The little girl hid under the blanket. 小女孩藏在了毯子下面。 3. about 11.000 metres deep 深约11000米 关于长、宽、高、深的表达： (1) 基数词+单位词+形容词 (long, wide, tall, high, deep等) 10 metres long 10米长 15 meters wide 15米宽 200 metres deep 200米深 (2) 基数词+单位词+in+名词 (length width, height, depth 等) 10 metres in length 10米长 15 meters in width 15米宽 200 metres in depth 200米深 (3) 对长、宽、高等提问用疑问词how。 How long/high/wide ...? ……多长/高/宽？ How wide is this river? 这条河有多宽？ How long is the Great Wall of China? 中国的长城有多长？ Natural wonders Mount Qomolangma the highest Sahara Desert the biggest Dead Sea the lowest Mariana Trench the deepest 8,848.86 9,000,000 416 11,000 课堂总结 一、单项选择 1. How do you read the number “8,848.86” in English? A. Eight thousand eight hundred and forty-eight point eight six. B. Eight thousands eight hundred forty-eight point eighty-six. C. Eight thousand and eight hundred forty-eight point eight six. 2. The Dead Sea is about 430 meters _______ sea level. A. under B. below C. down 3. — _______ is the Nile River? — It’s about 6,650 kilometers long. A. How much B. How deep C. how long 4. The Yangtze River is one of _______ rivers in Asia. A. long B. longer C. longest D. the longest A B A D 当堂检测 二、根据括号内提示完成句子 1. The Great Pyramid is a great ________ (奇观) of the ancient world. 2. We need to get the exact _____________ (测量数据) of the room before buying the carpet. 3. The temperature today is five degrees _______ (低于) zero. 4. The water _____ (水平面) in the lake is rising because of the heavy rain. 5. The _______ (表面) of the moon is covered with dust and rocks. 6. Mount Qomolangma is the _______ (high) mountain in the world. 7. The Sahara is by far the ______ (large) hot desert on Earth. 8. What’s the _______ (deep) point in the ocean? — It’s the Mariana Trench. wonder measurement below surface level highest largest deepest ✍ 以“The most amazing place I want to explore”为题，录制一段2分钟英文解说视频，并尝试解释原因。 Homework null 18528.0 null 110422.555 null 97647.43 null 76538.43 $