Unit 4 Section B (3a-3c)教学设计2025-2026学年人教版英语八年级上册

人教版八 年级 英语 科目课堂教学设计 课题 Unit 4 Section B (3a-3c) 时间 教师 二次备课 教学目标： 1.掌握蓝鲸的核心信息（体重、栖息地、食物、寿命、生态作用)，理解文本中关键词汇(ocean,except,tiny, lively, live up to 等）的含义与用法。 2.明确第三人称文本改写为第一人称的核心要点(人称转换、内容完整、句式调整），能完成3a文本的第一、二段改写。 3.认识蓝鲸对海洋生态系统的重要性〈死亡后为海洋生物提供食物、维持生态平衡)，初步建立“动植物与生态系统共生”的环保意识。 教学重点难点： 重点：掌握“第三人称转第一人称”的改写方法:人称代词〈it/they→I)、名词(blue whales→I)调整，同时保持内容不遗漏、语言自然。 难点：改写时兼顾“内容完整性”与“语言流畅性”，避免因人称转换导致句式混乱。 教 学 过 程 设 计 Lcad in 1. Look at a picture about the blue ocean. 2.Look at some pictures about the sea lives are in great danger. Give some possible reasons. Pre - writing 1. Listen and guess what animal it is.Give students some clues about it , and guess the answer. 2. Watch a short video about Blue Whale and take notes about interesting facts. While-writing 1. Read the text and circle some interesting facts about Blue Whale. 2.Do you konw anything about them? While-writing Read the text and circle some interesting facts about Blue Whale. The Blue Whale The blue whale is the largest and heaviest animal on earth. lt 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. 语言点精讲 · Ocean /ˈəʊʃn/ n. 大海；海洋 常见短语：the + ocean（搭配定冠词the） We can see many fish in the ocean · tiny /ˈtaɪni/ adj. 极小的；微小的 常见短语：a tiny + 名词（搭配不定冠词a） There is a tiny bird in the tree. · the Arctic Ocean /ˈɑːktɪk ˈəʊʃn/ n. 北冰洋 常见短语：the + Arctic Ocean（搭配定冠词the） The Arctic Ocean is one of the world’s oceans. · except /ɪkˈsept/ prep. 除……之外；除了 常见短语：except + 名词/代词 We have all the books except this one. · lively /ˈlaɪvli/ adj. 精力充沛的；生机勃勃的 常见短语：a lively + 名词（搭配不定冠词a） She is a lively student in our class. · Billy /ˈbɪli/ n. 比利（人名） 用法：直接作人名使用 Billy is good at playing football. 作业布置： 教学反思及作业反馈： （1） 存在问题： （2） 解决办法： 学科网（北京）股份有限公司 $