必修三 Unit 3 Period 2 Using language（课件）-【上好课】2024-2025学年高一英语同步精品课堂（外研版2019必修第三册）

仓颉之初作书盖依类象形故谓之文其形声相益即谓之字文者物象之本字者言孳乳而浸多也著于竹帛谓之仓颉之初作书盖依类象形故谓之文其形声相益即谓之字文者物象之本字者言孳乳而 Using language 外研版必修三 Unit 3 The World of Science Step 1 : Lead-in Compare the following pairs of sentences and identify the basic sentence patterns of the present perfect and the present perfect passive. Notes a I guess someone has asked you about the title of your book before. I guess you have been asked about the title of your book before. b People have used new inventions to make replacement hearts. New inventions have been used to make replacement hearts. Step 1 : Lead-in Active and passive structures of the present perfect tense. Notes Definition This tense indicates the action that takes place in the past and continues to the present or affects the present Present perfect active voice Subject+ have/has done+... Present perfect passive voice Subject+ have/has been done+... Step 2 : Presentation 1. 现在完成时的被动语态的肯定式: have/ has been done。 2. 完成时的被动语态的否定式: have/ has not been done。 3. 现在完成时的被动语态的一般疑问句需将have/has提到主语的前面, 即Have/ Has+ 主语+ been done。 4. 现完被动语态的特殊疑问句: 特殊疑问词+ have/ has been done。 Notes 现在完成时被动语态的结构就是现在完成时态和被动语态结构的叠合, 即“have/ has been done”。 Step 2 : Presentation * The doctor hasn’t been sent for yet. 还没有派人去请医生。(意为“应派人去请医生”) *The office has just been cleaned. 办公室刚被打扫过。(意为“已不用清扫房间了”) *Such a thing has never been heard of before. 这样的事以前从未听说过。(意为“现在才听说”) Notes 现在完成时的被动语态同它的主动语态一样, 强调过去的动作对现在造成的影响或结果, 常与 already, yet, just, never, recently等副词连用。 Step 2 : Presentation *The machine has been repaired for two hours. 这台机器已修了两小时了。 *Modern methods of tracking polar bear populations have been employed only since the mid-1980s. 追踪北极熊数量的现代方法自从20世纪80年代中期才被采用。 *How long has the project been carried out? Notes 表示一个被动的动作或状态开始于过去, 持续到现在, 并可能持续下去, 常与for或since等引导的时间状语连用, 或用于How long. . . ? 句型中。 Step 2 : Presentation 现在完成时的被动语态有两个助动词, 即 have/has和been, 两者缺一不可。 一般过去时的被动语态表示一个被动的动作发生在过去某个时候, 其结果对现在没有影响; 而现在完成时的被动语态的动作或状态尽管发生在过去, 但侧重说明该动作或状态对现在造成的影响和结果。 *The house was built last year. 这房子是去年建造的。 *The house has been built. 这房子已经建好了。 Step 2 : Presentation 由finish, buy, start, begin, post, return, borrow, join, marry, open等非延续性动词构成的现在完成时的被动语态不能与表示一段时间的状语如for four days, how long等连用, 而要改换动词或时态。但这类动词的否定式可表示动作的持续过程, 具有延续性, 因而可与since或for引导的时间段连用。 Notes 误: How long has this book been bought? 正: How long ago was this book bought? Step 3 : Practice Rewrite the underlined sentences using the present perfect passive. ① It has already affected many things in our lives. ② Some restaurants in London have served 3D-printed hamburgers to customers. Many things in our lives have already been affected by it. 3D-printed hamburgers have been served to customers in some restaurants in London. Step 3 : Practice ③ The most significant success that people have achieved to date is in medicine. ④ They have made human body parts, including a beating heart, with 3D printing technology. ⑤ People have given a new 3D-printed shell to a turtle injured in a forest fire! The most significant success that has been achieved to date is in medicine. Human body parts, including a beating heart, have been made by them, with 3D printing technology. A new 3D-printed shell has been given to a turtle injured in a forest fire! Step 4 : Careers in Science Look at the pictures and learn about words describing careers in science. Step 4 : Careers in Science Discuss what career in science interests you most. I’m interested in the work of a doctor because being a doctor is a great occupation. Doctors who are called “angels in white” are always working for patients’ health. They can help patients heal from health problems, such as colds, headaches, stomachaches and so on. Also, doctors can save the lives. I will work hard to prepare for my future. Step 5 : Invention stories What is it? It's 1.____________________. Who was it invented by? It was invented by 2.___________ called Kenneth. Who inspired the invention? 3. ____________, who has Alzheimer's. How does it work? 4. ___________ is sent to a mobile phone like an alarm when the person with it 5.___________________. 1. It is not just humans who are benefiting—in Brazil, people have given a new 3D-printed shell to a turtle injured in a forest fire! [句式分析]“It is not just humans who are benefiting”本句为“强调句”，其基本结构为“It’s+ 被强调部分+ that+ ...”。 注意强调句中的连接词一般只用who（指人）或that（可指物，也可指人）。若被强调的是状语，只能用that，而不能用when或者where，而且连接词不能省略。 “injured in a forest fire”为过去分词短语作“后置定语”，修饰“a turtle”。 受益的不只是人类——在巴西，人们给一只在森林火灾中受伤的海龟一个新的3d打印外壳! 尝试翻译 Step 6 : Language points 2. His work on Chen’s Theorem made an important advance towards proving Goldbach’s Conjecture, the greatest unsolved problem in number theory. [句式分析]“make an important advance towards...”意为“取得重要进展”，“the greatest unsolved problem in number theory”作“同位语”解释“Goldbach’s Conjecture”。“unsolved”意为“未解决的”。 陈氏（陈景润）定理的研究在证明哥德巴赫猜想方面取得了重要进展，哥德巴赫猜想是数论中最重要的未解问题。 尝试翻译 Step 6 : Language points 仓颉之初作书盖依类象形故谓之文其形声相益即谓之字文者物象之本字者言孳乳而浸多也著于竹帛谓之仓颉之初作书盖依类象形故谓之文其形声相益即谓之字文者物象之本字者言孳乳而 外研版必修三 Unit 3 Thank you ！ Using language $$