Unit 2 Greener Planet, Better Home第5课时Grammar in use 课件2026-2027学年仁爱科普版英语九年级上册

该初中英语课件围绕“Greener Planet, Better Home”单元，聚焦前缀re-构词规则与现在完成时用法。课堂导入通过“Watch and answer”“Listen and fill”等活动，从旧物再利用情境切入，结合单词变形规则和例句填空，搭建从词汇到语法的递进学习支架。 其亮点在于融合环保主题，通过re-前缀口诀区分“再次/重新”与“往回/返回”含义，对比现在完成时与一般过去时，提升思维品质。采用“Green Life Interview”情境活动和分层次作业，增强语言运用能力，助力学生巩固知识，教师教学更高效。

谁能想到咱们吃完随手丢掉的纸盒，最后居然能变成家里天天用的卷纸。你看这些沾满油渍的废旧纸板，先送进粉碎机彻底打碎，再经过多道工序分解、泼墨、制浆、漂白，把油污、杂质全部清理干净。浆料烘干成型后，经过卷绕、分切、封装，流水线源源不断产出崭新的卫生纸，最后打包入库，送往千家万户一张废纸的循环重生，既减少树木砍伐，又能变废为宝这一套完整工业回收流程，看完是不是觉得特别神奇？ 快去试试。 One, it's a good idea to reuse plastic bags as waste bags. It's a good idea to reuse plastic bags as waste bags. Two, scientists have found a new way to the cycle waste paper into newspaper products. Scientists have found a new way to recycle waste paper into newspaper products. Three, our community has renewed calls for cleaning up the waste along the river. Our community has renewed cause for cleaning up the waste along the river. Grammar in use （仁爱版 2024）九年级 上 Unit 2 Greener Planet, Better Home 1 Learning objectives 0 Lead in Presentation 2 Practice Production 4 Summary Assessment 6 Homework 1 3 5 7 Watch and answer. Lead in 01 Plastic bags /waste paper. Q: What things can you see in the video? Q: What do people do with these old things? Reuse them. Recycle paper. Lead in 01 It’s a good idea to _______ plastic bags as waste bags. reuse Scientists have found a new way to ________ waste paper into new paper products. recycle Our community has ________ calls for cleaning up the waste along the river. renewed Listen and fill. use (v. 使用) + -re = reuse (v. 再次使用) cycle (v. 循环) + -re = recycle (v. 回收利用) new (adj. 新的) + -re = renew (v. 更新；重新发起) 动词 / 形容词 + re- → 新词 含义：再次；重新 Look and read. Lead in 01 It’s a good idea to _______ plastic bags as waste bags. reuse Scientists have found a new way to ________ waste paper into new paper products. recycle Our community has ________ calls for cleaning up the waste along the river. renewed Activity 1 Look at the pictures and read the sentences. Pay attention to the words in bold. Look and learn. Presentation 02 The suffix- re 用法 1： re- + 动词 → 新动词 ✅含义：再次、重新 again ✅例1： use (v. 使用) + re- → reuse (v. 重复使用；再利用) 短语： reuse plastic bags 重复使用塑料袋 ✅例2 cycle (v. 循环) + re- → recycle (v. 回收利用) ✅拓展： visit (v. 参观)+re- → revisit (v. 重访) build (v. 建造)+re- → rebuild (v. 重建) write (v. 书写)+re- → rewrite (v. 重写) Look and learn. Presentation 02 The suffix- re 用法 2： re- + 动词 → 新动词 ✅含义：往回、返回 back ✅例1： turn (v. 转动)+re- → return (v. 返回；归还) 短语： return books 归还书籍 ✅例2 call (v. 呼喊)+re- → recall (v. 召回；回忆) Look and learn. Presentation 02 The suffix- re 快速区分口诀 词根前面加上前缀 re-，一层含义 “再次、重新”； 另一层是 “往回、返回”。 re - 主要加在动词前，构成新动词，放在 will/need to/can 后，使用动词原形。 例：We will revisit the park. 2.时态变化只改变新词，前缀 re 保持不变 例：People rebuilt the city.（过去式） Our community has renewed calls.（现在完成时） ⚠️注意：少数单词拼写特殊 build → rebuilt Tips-词性判断 Activity 2 Make new words with the prefix re- and then fill in the blanks. Make new words and fill in blanks. Presentation 02 re + We will ________ the insect museum to learn more about ants. Whenever there is pollution again, we need to ________ the action to stop it. After the earthquake, people ________ the city with the help from all over the world. We can help ________ the world history by saving every drop of water. take visit write build + revisit retake rebuilt rewrite Activity 3 Read and fill. Presentation 02 Activity 3 Read the text and fill in the blanks with the given words. recreate reuse reduce rethink Many people use plastic bags to carry their things and throw the bags away. Perhaps, we should ________ about this and find a better way to use them. One of the ways is to ________ them. After we bring our things home in a plastic bag, we can save it and use it again for something else. This is a great way to ________ the number of new plastic bags. By reusing plastic bags, we can cut down pollution and ________ a greener world. rethink reuse reduce recreate Read the conversation. Pay attention to the present perfect tense of verbs. Activity 1 Pair work. Presentation 02 Hi, Kangkang! Did you take part in the speech about waste sorting last Saturday? Yes, I did. I have learned a lot about sorting the waste since I listened to the speech. Me too. I have kept sorting out all the waste at home for five days. Now I am really good at it. 11 Look at the pictures and read the sentences. Pay attention to the words in bold. Look and read. Presentation 02 What sentence is this? 自从听完演讲，我学到了很多垃圾分类知识。 我已经坚持在家分类所有垃圾五天了。 Yes, I did. I have learned a lot about sorting the waste since I listened to the speech. Me too. I have kept sorting out all the waste at home for five days. Now I am really good at it. Present perfect tense现在完成时 Presentation 02 Read and learn. Present perfect tense现在完成时 ✅定义 现在完成时表示：动作发生在过去，但是和现在有密切联系。 两层核心含义： ① 动作从过去开始，持续到现在； ② 过去发生的动作，对现在造成结果或影响。 ✅例句： We have planted many trees.我们已经种了很多树。 （树现在还在，环境得到改善，体现对现在的影响） Presentation 02 Read and learn. ✅基本结构 句式 结构 肯定句 主语 + have/has + done 否定句 主语 + have/has + not + done 一般疑问句 Have/Has + 主语 + done? Tips：have not = haven’t；has not = hasn’t Presentation 02 Read and learn. ✅用法 1：持续用法 动作始于过去，一直持续到现在，常搭配 for + 一段时间 /since + 时间点 / 过去句子 ✅小试牛刀： She has saved water for two years. 译文：她节约用水已经两年了。（单数主语，动作持续至今） Presentation 02 Read and learn. ✅用法 2：影响 / 结果用法 动作发生在过去，不强调具体什么时候做的，重点突出当下产生的结果 ✅小试牛刀： I have cleaned the park. 译文：我已经打扫完公园。（结果：公园现在干净了） They have turned waste into new things. 一般过去时 Simple Past 描述发生在过去、和现在切断联系的动作 Read and learn. Presentation 02 Present perfect tense现在完成时 ✅ 常有明确过去时间标志： yesterday, last Saturday, …ago, in 2020 ❌ 不关注现在结果 例句：I sorted waste last Saturday. 上周六我分了垃圾。 （只讲上周六的行为，不提现在） 动作始于过去，和现在紧密关联 Read and learn. Presentation 02 Present perfect tense现在完成时 ✅两层含义： ① 持续到现在；② 过去动作对现在造成结果 / 影响 ✅ 标志：for + 一段时间、since、already、yet、so far ❌ 不能搭配明确过去时间词 例句：I have sorted waste for five days. I have learned much about waste sorting. 我学到了很多垃圾分类知识。（现在我掌握这些知识） Presentation 02 Read and learn. Present perfect tense (II) 维度 一般过去时 Simple Past 现在完成时 Present Perfect 时间视角 只看过去，与现在无关 过去→延伸到现在 结构 主语 + 动词过去式 主语 + have/has + 过去分词 时间状语 last… / …ago /yesterday（具体过去时间） for, since, already, yet （无明确过去时点） 关键提问 When did you…? （你什么时候做的？） How long have you…? （你做多久了？） Presentation 02 Activity 2 Complete the table. Activity 2 Complete the table and learn how to use for and since. for + a period of time ______ two weeks since + a point in time (in the past) ______ two weeks ago We haven’t seen any waste in the river ______ several months. —How long has your city sorted the waste? —______ 2020. I have been in an environmental group ______ the new term began. for since for Since since Activity 3 Look and answer. Activity 3 Look at the pictures and answer the questions with for or since. Practice 03 He has kept sorting the waste since three years ago. How long has Li Wei kept sorting the waste? 💡Tips: (3 years ago) 💡Tips: 3 years ago 是时间点，用 since 🔹 since + 时间点 / …ago / 句子 🔹 for + 一段时间（时长） 21 Activity 3 Look and answer. Activity 3 Look at the pictures and answer the questions with for or since. Practice 03 She has been in the tree planting activity for one year. 2. How long has Lingling been in the tree planting activity? 💡Tips: (one year) 💡Tips: one year 是一段时间，用 for 🔹 since + 时间点 / …ago / 句子 🔹 for + 一段时间（时长） 22 Activity 3 Look and answer. Activity 3 Look at the pictures and answer the questions with for or since. Practice 03 3. Have you ever recycled to protect our environment? If so, how long have you been like this? 🔹 since + 时间点 / …ago / 句子 🔹 for + 一段时间（时长） ✅版本 1（用 for） Yes, I have. I have recycled waste for two years. ✅版本 2（用 since） Yes, I have. I have recycled waste since last year. 23 Green Life Interview Production 04 Green Life Interview. Words Bank 🎤 Interview Script（语言支架） 采访者（Reporter）： Have you taken any green actions? How long have you …? 受访者（Interviewee）： Yes, I have. I have … for … / since … keep sorting waste 坚持垃圾分类 save water 节约用水 plant trees 植树 recycle plastic bottles 回收塑料瓶 ride a bike to school 骑车上学 stop using disposable bags 不使用一次性袋子 We have taken green actions for a long time. Our earth will become better. ⭐ 正确使用 have/has ⭐ for 和 since 使用无误 ⭐ 发音清晰，对话流畅 25 Show time Talk clearly (内容清晰) Pronunciation(发音标准) Body language(使用肢体语言) Fluently(流利的) Reasonable(理由合理) Grade and share: 一、用前缀 re - 构成新词，填入正确形式 We will ________ (visit) the insect museum to learn more about ants. Whenever there is pollution again, we need to ________(take) the action to stop it. After the earthquake, people ________ (build) the city with the help from all over the world. We can help ________ (write) the world history by saving every drop of water. Please ________ (read) the article so you can find more environmental tips. If you fail, don’t give up, just ________ (try). We ___________ (plant) trees in the park to make the air fresh again. You can ________ (use) the bottle to hold water instead of throwing it away. The grammar we have learned Summary 05 revisit retake rebuilt rewrite reread retry replanted reuse 二、从 A、B、C 三个选项中，选出可以填入空白处的最佳答案。 ( ) 1. Li Wei ________ sorting waste for three years. A. does B. has done C. did ( ) 2. Lingling ________ in the tree planting activity since one year ago. A. is B. was C. has been ( ) 3. People ________ the river clean since 2020. A. keep B. have kept C. kept ( ) 4. We haven’t seen rubbish in the river ________ several months. A. for B. since C. ago ( ) 5. The community has cleaned the river ________ the new term began. A. for B. since C. in The grammar we have learned Summary 05 B C B A B 三、从方框内选择合适的单词 / 短语，并用正确形式补全短文。 recreate reuse reduce rethink Many people use plastic bags to carry their things and throw the bags away. Perhaps, we should 1.________ about this and find a better way to use them. One of the ways is to 2.________ them. After we bring our things home in a plastic bag, we can save it and use it again for something else. This is a great way to 3.________ the number of new plastic bags. By reusing plastic bags, we can cut down pollution and 4.________ a greener world. The grammar we have learned Summary 05 rethink reuse reduce recreate Assessment 06 Self-assessment I can master the prefix re- word formation rules. I can master the usage of for and since in present perfect tense； I can use grammar to talk about environmental actions. Basic (基础) Improving(提升) Extend (拓展) Homework 07 整理本课带有前缀 re - 的单词，背诵 re - 构词含义。 仿照课本例句，写出 5 组句子，分别使用 for 和 since 描述持续的行为。 口头问答练习：采访家人，询问一项长期坚持的好习惯 / 环保行动，记录 3 组问答。 Lavf59.14.100 Lavf59.14.100 www.17zuoye.com 本音频通过一起作业网听力材料制作工具生成 45720.0 $