Unit 13 Section A (GF-4c)（讲解课件）-【优翼·学练优】2025-2026学年九年级英语下册同步备课（人教版）

该初中英语课件聚焦九年级下册Unit 13“拯救地球”主题，核心涵盖现在进行时、现在完成时、被动语态等语法点及环保词汇句型。课堂导入通过Revision环节，引导学生回顾鲨鱼保护文章，围绕问题、原因、现状及解决方法提问，搭建旧知与新语法学习的支架。 其特色是以环保主题为载体整合语法教学，通过Grammar Focus表格清晰呈现语法点，Practice对话填空和4b情态动词练习提升语言能力，讨论环节（如列举环保行动、角色对话）培养思维品质与文化意识。学生能在实践中掌握语法并增强环保责任感，教师可借助系统讲解与互动活动提升教学效率。

优翼英语教学课件（RJ） Go for it! 九年级（下） 1 Section A (Grammar Focus-4c) Unit 13 We’re trying to save the earth! Learning Goals Key words & phrases: take part in, afford, turn off, reusable, pay for, take action, transportation Key sentences: 1.Have you ever taken part in an environmental project? 2. We should help save the sharks. To review different tenses and voices. Revision Retell the passage about sharks in 3a What's the sharks' problem? Why are they endangered? Some facts and numbers about sharks at present How to save the sharks Reason: Comment: Shark fin soup: What people do: Result: Sharks’ situation: Environmental protection groups (Wild Aid & WWF): scientific studies: at the top of food chain, ecosystem, numbers drop, bring danger to... popular, southern China catch, cut off, throw… back into ... without, can no longer swim, slowly dies not only cruel , but also harmful to be endangered, although… ② numbers, have fallen, 90%, in the last 20 to 30 years. ② teach … about … ① ask...to...laws to stop… ①70 million,are caught, traded, industry No…, show…, be good for... Presentation Grammar Focus We’re trying to save the earth. Present progressive The river used to be so clean. used to The air is badly polluted. Passive voice No scientific studies have shown that shark fins are good for health. Present perfect We should help save the sharks. Modal verbs Grammar 现在进行时 现在进行时 基本 结构 基本 用法 标志词 be (am/is/are) + 动词-ing 1.表示现在正在进行或发生的动作。 2.表示现阶段或当前一段时间之内 正在进行的动作。 now、look、listen、these days等 a.一般情况下，在动词词尾后加-ing。 如：go → going。 b.以不发音的e结尾的动词，去掉e加-ing。 如：have → having。 c.以重读闭音节结尾的动词，末尾只有一个辅音字母，双写这个辅音字母，再加-ing。 如：run → running。 动词-ing形式的构成 现在完成时 现在完成时 基本 结构 基本 用法 标志词 have/has + 过去分词 1. 表示过去发生或已经完成的动作对现在造成的影响或结果。 2. 从过去某一时间开始并一直持续到现在且还有可能持续下去的动作。 already、yet、ever、never、for +时间段、since +时间点、so far、in the last/past...years等 过去分词的构成 一般情况下，在动词后加-ed。如: work → worked。 在以e结尾的动词后只加-d。如: close → closed。 以辅音字母加y结尾的动词，应将y改为i再加-ed。如: study → studied。 以重读闭音节结尾的动词，要双写末尾的辅音字母再加-ed。如: stop → stopped。 不规则动词的过去分词: AAA型 put put put AAB型 beat beat beaten ABA型 become became become ABB型 get got got/gotten ABC型 begin began begun 被动语态 主动语态表示主语是动作的执行者。被动语态表示主语是动作的承受者，即行为动作的对象。 I cleaned my room. → My room was cleaned by me. I saw him cross the road and enter the shop. → He was seen to cross the road and enter the shop. 在含有使役动词 (如：make) 或感官动词 (see、watch、notice、hear等) 的主动语态的句子中，这些词后常跟省略to的动词不定式，但是改为被动语态时则要把省去的to还原。 被动语态的构成 被动语态的基本结构：助动词be + 及物动词的过去分词 一般现在时的被动语态：am/is/are + 过去分词 一般过去时的被动语态：was/were + 过去分词 一般将来时的被动语态：will be/is going to be + 过去分词 含情态动词的被动语态：情态动词 + be + 过去分词 1. 情态动词一般没有人称和数的变化。 2. 情态动词后接动词原形。 3. 常用的情态动词有：can/could、may/might、must/have to、should/ought to、would、need等。 情态动词 used to used to意为“过去常常做某事”，后接动词原形。 used to句型的否定句形式：didn’t use to... used to句型的一般疑问句形式：Did + 主语 + use to...? used to do表示过去常常做某事，而现在往往不做了； be used to doing表示习惯于做某事。 Practice 4a Fill in the blanks with the correct forms of the verbs in brackets. Joe: ______ you ever ________ (take) part in an environmental project? Ken: Yes, I have. I _______ (help) with a Clean-Up Day last year. It was __________ (consider) the biggest clean-up project this city______ ever ________ (have). Joe: How many people ________ (take) part? Have taken helped considered had had took Ken: I ___________ (think) more than 1,000 people ______(come) to help out. Joe: That’s fantastic! I guess everyone in this city is ______ (try) to improve the environment. Ken: Yes, we can’t afford to________ (wait) any longer to take action! think came trying wait 4b Fill in the blanks with the appropriate modal verbs from the box. People _________ think that big things__________________ be done to save the earth. Many forget that saving the earth begins with small things. For example, you ______________ save electricity by turning off the lights when you leave a room. You _______________ also use reusable bags instead of plastic bags. can would could have to should must may/ might may/might should/have to/must can/could/should can/could/should adj. 可重复使用的；可再次使用的 关掉 I think it’s a great idea that you now _______ pay for plastic bags in some stores. And instead of driving to school or work, you _______________ ride your bike or walk. If it’s far, you __________ take the bus. All these small things __________ add up and become big things that ______________ improve the environment. Let’s take action now! have to can/could/should can/could can/could would/can/could 付费；付出代价 采取行动 4c Make a list of things that people can do to help the environment and discuss your list with your partner. I think that everyone should use public transportation. I disagree. It’s difficult for parents with young children to use public transportation... use public transportation n. 运输业；交通运输 use public transportation (n.交通运输); turn off the lights when you leave a room; use reusable bags instead of plastic bags; ride your bike or walk to school or work; stop using paper napkins(餐巾纸); recycle books and paper... Discussion Language Points 1. Have you ever taken part in an environmental project? (教材P100 4a) take part in 参加 take part in多指参加会议或集体性的工作或活动，且参加者在其中发挥一定的作用。 Li Lanjuan headed for Wuhan and took an active part in the battle. 2. Yes, we can’t afford to wait any longer to take action! (教材P100 4a) afford /əˈfɔː(r)d / v. 承担得起（后果）；买得起 afford作动词，常用在can、could、be able to等之后。afford sth.“买得起某物”；afford to do sth.“负担得起做某事”。 I can’t afford the new TV. I hope I can afford to buy a big house one day. Exercises 一、单项选择 1. Listen! Our science teacher ________ the use of the robot. A. explains B. explained C. is explaining D. has explained 2. “I’m still working because I’m still capable and hope to guide more young people,” said Wu Mengchao when he _______. A. is interviewed B. is interviewing C. was interviewed D. was interviewing C C 3.— Our computer is working again! — Yes. Our IT teacher ________ it. It took him about an hour. A. has fixed B. will fix C. is fixing D. was fixing 4.— Must I wash my clothes at once, Mom? — No, you ________. You ________ wash them before 5:00 p.m. A. needn’t; may B. mustn’t; may C. needn’t; need D. mustn’t; must A A 5.What an amazing robot! It _______ cook more than 5,000 dishes. A. shall B. need C. must D. can 6. — Only ten tickets? What do you mean? There _______ be twelve. — Sorry, Linda. Jacky and Tim took two tickets away. A. should B. will C. can D. may D A Homework Preview the new words and phrases in Section B(1a-1e). 2. Do the exercises in students’ book. Thank you! 本文件著作权为创作公司所有, 仅限于教师教学及其他非商业性和非盈利性用途。如发现盗用、转卖、网络传播等侵权行为, 本公司将依法追究其相应法律责任。 部分素材选自网络, 如有争议, 请联系删改。 声 明 $