Unit 3 Section Ⅲ Discovering Useful Structures-(配套课件)【精讲精练】2025-2026学年高中英语必修第二册(人教版)

该高中英语课件聚焦现在完成时的被动语态，通过回顾现在完成时主动用法导入，搭建从常用句式（肯定、否定、疑问）到用法（完成影响、持续状态、状语从句）的学习支架，结合例句与即时训练衔接前后知识。 其亮点在于模块化设计（语法精讲-核心知识-随堂演练-课时作业），通过对比辨析（与一般过去时被动的区别）培养思维品质，结合语境例句（如保护濒危动物）和分层次练习（改写、填空）提升语言能力。学生能在应用中掌握语法，教师可借助系统练习提升教学效率。

UNIT 3　THE INTERNET 主题语境——人与社会之科学与技术 返回目录 英语·必修 第二册(配RJ版) 1 UNIT 3　THE INTERNET Section Ⅲ　Discovering Useful Structures 返回目录 英语·必修 第二册(配RJ版) 1 UNIT 3　THE INTERNET 目 录 01 CONTENTS 04 语法精讲·技能培养 课时作业·知能达标 02 核心知识·关键能力 03 随堂演练·巩固提升 返回目录 英语·必修 第二册(配RJ版) 1 UNIT 3　THE INTERNET 语法精讲·技能培养 01 返回目录 英语·必修 第二册(配RJ版) 1 UNIT 3　THE INTERNET 返回目录 英语·必修 第二册(配RJ版) 1 UNIT 3　THE INTERNET 返回目录 英语·必修 第二册(配RJ版) 1 UNIT 3　THE INTERNET 返回目录 英语·必修 第二册(配RJ版) 1 UNIT 3　THE INTERNET 返回目录 英语·必修 第二册(配RJ版) 1 UNIT 3　THE INTERNET has always been praised has been found hasn't been decided 返回目录 英语·必修 第二册(配RJ版) 1 UNIT 3　THE INTERNET 返回目录 英语·必修 第二册(配RJ版) 1 UNIT 3　THE INTERNET 返回目录 英语·必修 第二册(配RJ版) 1 UNIT 3　THE INTERNET have been published were made have been taken has been passed has been decorated 返回目录 英语·必修 第二册(配RJ版) 1 UNIT 3　THE INTERNET 返回目录 英语·必修 第二册(配RJ版) 1 UNIT 3　THE INTERNET 返回目录 英语·必修 第二册(配RJ版) 1 UNIT 3　THE INTERNET 返回目录 英语·必修 第二册(配RJ版) 1 UNIT 3　THE INTERNET 返回目录 英语·必修 第二册(配RJ版) 1 UNIT 3　THE INTERNET have taken have been set were planted have been taken have been released 返回目录 英语·必修 第二册(配RJ版) 1 UNIT 3　THE INTERNET 核心知识·关键能力 02 返回目录 英语·必修 第二册(配RJ版) 1 UNIT 3　THE INTERNET 返回目录 英语·必修 第二册(配RJ版) 1 UNIT 3　THE INTERNET was confirmed It has been confirmed that 返回目录 英语·必修 第二册(配RJ版) 1 UNIT 3　THE INTERNET 返回目录 英语·必修 第二册(配RJ版) 1 UNIT 3　THE INTERNET against to do Pressed from his parents 返回目录 英语·必修 第二册(配RJ版) 1 UNIT 3　THE INTERNET 随堂演练·巩固提升 03 返回目录 英语·必修 第二册(配RJ版) 1 UNIT 3　THE INTERNET have been built has been used has been reached has been polluted have been built has been arrested 返回目录 英语·必修 第二册(配RJ版) 1 UNIT 3　THE INTERNET All the preparations for the task have been completed (by us). How to solve that difficult technological problem hasn't been decided yet. They have been told to help you (by me) whenever you turn to them for help. 返回目录 英语·必修 第二册(配RJ版) 1 UNIT 3　THE INTERNET 课时作业·知能达标 04 返回目录 英语·必修 第二册(配RJ版) 1 UNIT 3　THE INTERNET 谢谢观看 返回目录 英语·必修 第二册(配RJ版) 1 UNIT 3　THE INTERNET 现在完成时的被动语态 现在完成时的被动语态表示到现在为止某事已经被完成或被做。该语法项目既要表示现在已经完成又要表示被动的含义，因此很多学生在具体运用中容易顾此失彼。 一、现在完成时的被动语态的常用句式 肯定式 主语＋have/has been done... 否定式 主语＋have/has not been done... 一般疑问式 Have/Has＋主语＋been done...？ 特殊疑问式 疑问词＋have/has＋主语＋been done...？ So far, effective measures have been taken to protect endangered creatures from dying out. 迄今为止，已经采取了有效措施来保护濒危动物免遭灭绝。 The construction of the bridge has not been finished. 这座桥的建设还没有完成。 Has the date for the next meeting been decided? 下次会议的日期已经确定了吗？ How long has the project been carried out? 这项工程已经实施多长时间了？ [即时训练1]　用现在完成时的被动语态改写下列句子 ①Jack's boss has always praised him for his devotion to work. →Jack _______________________ by his boss for his devotion to work. ②They have found a good place to build a temple in the village. →A good place ______________ by them to build a temple in the village. ③We haven't yet decided how to solve that difficult technological problem. →How to solve that difficult technological problem ___________________ by us yet. 二、现在完成时的被动语态的用法 1．表示被动的动作在说话之前已经完成，强调过去的动作对现在造成的影响或产生的结果，通常与already，yet，never，recently等副词及时间状语so far，by now，up till/to now，since等连用。 With more and more children taking part in this activity, many family problems have already been solved. 随着越来越多的孩子参加这项活动，许多家庭问题已经得到了解决。 2．表示一个被动的动作或状态从过去开始一直持续到现在，并可能继续持续下去，常与for或since等引出的时间状语(从句)连用，或用于how long引出的句子中。 We have been taught to be honest since we were very young. 自从我们很小的时候就被教育要诚实。 3．用在条件、时间状语从句中，表示从句动作先于主句动作完成。 You shouldn't go out before your homework has been finished. 在你的作业完成之前你不应该出去。 [即时训练2]　单句语法填空 ①I'm also good at writing in English and two articles of mine ___________ ________ (publish) on 21st Century so far. ②Some efforts _________ (make) to improve the air quality in the city last winter. ③Over the past three years, the paintings _______________ (take) to more than 20 museums in the world. ④For centuries, the ancient language _______________(pass) down from one generation to another. ⑤Their new apartment __________________ (decorate) for two months and they'll settle in it in the near future. 三、使用现在完成时的被动语态需要注意的问题 1．与一般过去时的被动语态的区别：一般过去时的被动语态所表示的动作或状态与现在的情况没有联系，而现在完成时的被动语态则强调与现在的情况有联系。 The park was opened to the public last year. 这个公园去年向公众开放。(说明动作发生于过去) The park has been opened to the public. 这个公园已向公众开放。(说明动作发生于过去，但对现在有影响，即现在公园已经向公众开放了) 2．非延续性动词，如borrow、finish、begin、start、buy、marry、open、join等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连用。若要表达相应的意思，则要改换动词或时间状语。 The work was finished two weeks ago. 这项工作于两周前被完成。 The work has been finished. 这项工作已经被完成。 3．短语动词是一个不可分割的整体，在被动语态中要保持其完整性，其中的介词或副词不可省略。 It is said that the problem has been looked into. 据说这个问题已经被调查过了。 4．只带有一个宾语的动词变为被动语态时，将主动语态的宾语变为被动语态的主语。 Great improvements in public health have been brought about by advances in medical science. 医学科学的进步带来了公共卫生的巨大改善。 5．带有双宾语的动词， 如give，send，bring，take，teach，show，tell，buy，lend，promise等， 变为被动语态时， 一般将间接宾语变为被动语态的主语， 若将直接宾语变为被动语态的主语时，间接宾语前面要用相应的介词。 Their teacher has given them many chances to practice what they have learned in class. →They have been given many chances to practice what they have learned in class (by their teacher). →Many chances have been given to them to practice what they have learned in class (by their teacher). 他们的老师给了他们很多机会练习上课所学(的内容)。 [即时训练3]　单句语法填空 ①Great changes __________ (take) place in my hometown and you can see that a lot of factories _____________ (set) up. ②More than 200 trees ____________ (plant) in our school last year. ③Many new measures _______________ (take) to improve teaching quality since the new headmaster came. ④Since the end of the war, over five thousand prisoners __________________ (release). confirm sb in sth　　使某人确信某事 It has been confirmed that... 已经证实/确定…… [经典佳句]　Planning to take a group to pay a visit to your school next month, I'm writing to confirm some information. 计划下个月组团到贵校参观， 我写信确认一些信息。 [即时训练]　单句语法填空/完成句子 ①They worked out an effective method，which _____________(confirm) by the leadership. ②据证实，一些外籍教师届时将进行歌唱、舞蹈和戏剧表演。 __________________________ some foreign teachers will stage singing，dancing and drama performances then. (1)press...against/to... 　　把……压/挤/贴在…… press sb to do sth 极力劝说/敦促某人做某事 (2)pressure n. 压力，压强；强制 under pressure 承受压力 [经典佳句]　He pressed the button and the doorbell rang. 他按了按钮，门铃响了。 [即时训练]　单句语法填空/完成句子 ①She pressed her face _______ the window，wondering why her mother was so upset. ②It is unwise to press the children _____ (do) their homework every day. ③在父母的督促下，这个男孩决心不再玩电脑游戏。 ________________________，the boy is determined to stop playing computer games. Ⅰ. 用动词的适当形式填空 1．Many new buildings _______________ (build) in Tangshan since 1976. 2．The bike in my family _____________ (use) for 30 years. 3．Despite the previous talks, no agreement ________________ (reach) so far. 4．The water in the river _________________ (pollute), which makes it smell terrible. 5．How many shopping centers _______________ (build) in this city so far? 6．It is reported that the murderer _________________ (arrest). Ⅱ.用现在完成时的被动语态改写句子 1．We have completed all the preparations for the task. ______________________________________________________________ 2．We haven't yet decided how to solve that difficult technological problem. _________________________________________________________________ 3．I have told them to help you whenever you turn to them for help. _________________________________________________________________ $