Unit 4 Section B 3a-3c 课件 2026-2027学年人教版英语八年级上册

Unit 4 Amazing Plants and Animals Section B 3a-3c giraffe elephant eagle sloth (树懒) cactus (仙人掌) lotus (荷花) Learning Objectives 1.Extract key scientific facts about blue whales and organize them systematically in a table. 2.Rewrite the expository text into a first-person self-introduction, accurately converting scientific facts. 3.Learn about marine ecosystems and blue whales' role; enhance awareness of ocean protection. What does this video talk about? 861b240d-cd4e-4b4b-87c2-161e8c2fa4ea.source.default.zh-Hans 3 Read the text about the blue whale. The Blue Whale The blue whale is the largest and heaviest animal on earth. It can weigh as much as 200 tons. Many people like watching blue whales swim, and they think it is one of the most beautiful things to see. Blue whales live in all oceans except the Arctic Ocean. They eat a lot, but they eat some of the tiniest animals in the ocean. A blue whale can eat around four tons of these a day. Blue whales can live up to 90 years. When a blue whale dies at sea, it becomes food for many kinds of animals living in and around the sea. This food lasts for over a year and it helps to create a lively and healthy ecosystem. Blue whales play an important role in our world, so we must protect them. 3a 3a Read the text and complete the table. Blue whale facts Weight Where they live Food How long they live Importance in nature The blue whale is the largest and heaviest animal on earth. It can weigh as much as 200 tons. Many people like watching blue whales swim, and they think it is one of the most beautiful things to see. Blue whales live in all oceans except the Arctic Ocean. They eat a lot, but they eat some of the tiniest animals in the ocean. A blue whale can eat around four tons of these a day. Blue whales can live up to 90 years. When a blue whale dies at sea, it becomes food for many kinds of animals living in and around the sea. This food lasts for over a year and it helps to create a lively and healthy ecosystem. Blue whales play an important role in our world, so we must protect them. As much as 200 tons In all oceans except the Arctic Ocean Some of the tiniest animals in the ocean Up to 90 years When a blue whale dies, it becomes food for many animals and it helps to create a lively and healthy ecosystem. 5 as much as 200 tons in all oceans except the Arctic Ocean 4 tons of the tiniest animals in the ocean a day live up to 90 years become the food for many kinds of other animals shrimp磷虾 Blue whales are..., they live..., they eat... The blue whale is ____________________________ on earth. It can ________________________ 200 tons. Many people like watching blue whales swim, and they think it is __________________________________. Blue whales live ________________________ the Arctic Ocean. They eat a lot, but they eat ___________________________________. A blue whale can eat around four tons of these a day. Blue whales can_____________ 90 years. When a blue whale dies ______, it becomes food for many kinds of ______________________________. This food lasts for over a year and it ________________________________________. Blue whales ________________________ in our world, so we must protect them. the largest and heaviest animal weigh as much as one of the most beautiful things to see in all oceans except some of the tiniest animals in the ocean at sea animals living in and around the sea helps to create a lively and healthy ecosystem play an important role live up to Imagine you are a blue whale. Use the first person to rewrite the first paragraph. 3b Hello everyone! My name is Billy the Blue Whale. I am ___________________ _________________________________ ________ I’m heavy, but I love ________ __________________________________________________________________ _______________________. I live in ___________________________. My favourite food is ________________ _________________ I can eat __________________________. My weight is as much as swimming most beautiful things to see all oceans except the Arctic Ocean some of the tiniest around four tons of them a day animal on earth. the largest and heaviest 200 tons. in the ocean. Many people like watching me swim, and they think I am one of the animals in the ocean. 人称由第三人称变成第一人称 Complete your passage about the blue whale based on the text in 3a. 3c 写作指导 文本体裁 话题分析 要求完成段落的改写，主要改写内容为3a第二段的内容，涉及到蓝鲸的寿命和对生态环境的重要性等内容。 本文将第三人称的段落内容，改写为第一人称的段落内容。分析原文章属于介绍类文章，改写后，还是自身特性介绍，因此是说明文。 人称时态 以第一人称为主；以一般现在时为主。 What should we mainly pay attention to when rewriting an article? 人称: 由第三人称变成第一人称 内容要点: 要点不能省略或者遗漏。 语言: 个别句子需要变化结构 weight living area food preference（喜好） Observe and think How to use the first person to rewrite the second paragraph? points lifespan role /function importance 1. Blue whales can live up to 90 years. 蓝鲸的寿命可达 90 年 。 达到；符合（期望等） live up to 活到（某一年龄、岁数等） He always lives up to his parents’ expectations. 他总是不辜负父母的期望。 An elephant can live up to sixty years. 一头象能活到60岁。 Language points 拓展 同义词 reach reach 达到（某一数量、程度、年龄等 ）；在表示活到某一年龄时，可与 “live up to” 替换。 Some trees can reach a height of 30 meters. 有些树能长到 30 米高 。 Some people can reach 90 years old. 有些人能活到 90 岁 。 2. Blue whales live in all oceans except the Arctic Ocean. 蓝鲸生活在除北冰洋以外的所有海洋中。 （连词）除了,只是；除非 （介词）除……之外；除了 The restaurant is open every day except Monday.这个饭店除了星期一每天都营业。 其后接名词、代词等作宾语，表示某人或某物不包含在某一范围内。 except I won’t go except you come with me. 除非你跟我一起去，否则我不会去。 My dress is similar to yours, except mine is blue.我的连衣裙和你的相似，只是我的是蓝色的。 辨析 except, besides与but except 除……之外；除了 强调所排除的内容不包含在内，含有“减去”的意思 besides 除……之外（还有） 包括 besides 后面的内容，含有“加上”的意思 but 除……之外 与 except 用法基本相同。常用于no, nothing, anything 之后 They all went to the party except Ann.除了安，他们都去了聚会。 We have a lot in common besides music.除了音乐，我们还有很多共同点。 There is no one but me.这里除了我没有别人。 The blue whale is the_______ (large) animal on our planet. The cheetah runs the______ (fast) of all land animals. Many people think the bird has the_____________ (beautiful) feathers. The giraffe is much _____ (tall) than any other animal. This is one of the______________ (dangerous) snakes in the world. Which is _______ (heavy), an elephant or a rhinoceros? largest fastest most beautiful taller most dangerous heavier 一、用括号内所给单词的适当形式填空。 Exercise 二、完成句子 1.他一直努力达到父母的期望。 He is always trying his best to _____ ____ _____ his parents' expectations(期盼). 2. 二十四节气在中国文化中起重要作用。 The 24 solar terms _____ ____ _________ _________ _____ Chinese culture. 3.假如鸟吃了有病的或死的鱼，它们可能会相继死去。 If the birds eat the sick or dead fish, they may ________ ________. live up to play an important part/role in die off 4.这个有趣的部分才持续了半个小时。时间真短啊! This interesting part only ________ ________ half an hour. ________ ________ it was! 5.有了灯泡，人们可以在夜里做和白天一样多的事情。 With light bulbs, people can do _____ ______ ______ in the evenings ________ they can in the daytime. lasted for How short as many things as 6. 每个人都应该在让我们的学校变得更好方面发挥作用。 Everyone should _______ _______ _______ ________ making our school become better. 7. 这个教室能容纳多达60名学生。 The classroom can hold _______ _______ 60 students. 8. 森林是许多野生动物的家园。 The forest ______ ________ ______ many wild animals. play a role/part in up to is home to 19 9. 据说他们每年扔掉数百吨的垃圾。 It is said (that) every year they throw away _________ ______ ______ of rubbish. 10. 除了萨莉，我们所有人上周都参加了体育测试。 All of us took the PE test last week ________ ________. hundreds of tons except Sally 20 I am a blue whale. I am the largest and 1. _______ (heavy) animal on earth. I can weigh as 2. _______ (much) as 200 tons. Many people like watching me 3. _______ (swim), and they think I am one of the 4. _____________ (beautiful) things to see. I live in all oceans except the Arctic Ocean. I eat a lot, but I eat some of the 5. _______ (tiny) animals in the ocean. I can eat around four tons of these a day. I can live up 6. _____ 90 years. When I 7. _______ (die) at sea, I become food for many kinds of animals 8. ______ (live) in and around the sea. This food lasts for over a year and it helps create a lively and 9. ______ (health) ecosystem. I play 10. _____ important role in your world, so you must protect me. heaviest much swim most beautiful tiniest to dies living healthy an Homework 1. 基础层：抄写本课重点单词和短语，并用每个词语造一个句子。 2. 提高层：熟练朗读3a关于蓝鲸的课文。写一篇关于青蛙的短文， 至少使用5个新单词。 3. 拓展层：研究另一种在生态系统中起重要作用的动物，写一篇 报告，包括它的特征、作用以及为什么需要保护它。 $