Unit 2 Wildlife Protection Discovering Useful Structures 课件-2025-2026学年高中英语人教版（2019）必修第二册

该高中英语课件聚焦现在进行时被动语态，通过复习时态表格建立知识联系，以主动句转换实例（如“工人建房子”变被动）为学习支架，帮助学生掌握语法结构及用法。 其亮点在于融合语言能力、思维品质与文化意识，通过“三变三不变”规则解析、湿地保护短文写作、小组讨论等活动，强化语法应用同时培养环保意识。结构化总结提升学习效率，教师可借助实例和互动增强教学效果，学生在实践中提升语言运用和问题解决能力。

Unit 2 Wildlife Protection Report an ongoing event 1 Knowledge objectives: Using the present continuous passive voice correctly. Make language expression more accurate. Skill objectives: Master the form and meaning of the present continuous passive voice. Emotional objectives:Understand what happens to animals and arouse awareness of environmental protection. Thinking quality objectives:Think deeply about what we can do for wildlife and express our ideas. Learning goals Simple（一般） Continuous（进行） Present （现在） do/does Tense is/am/are doing Perfect（完成） Perfect continuous（完成） Past （过去） Future （过去） The past future （过去将来） have/has done have/has been doing did was/were doing had done Had been doing will/shall do will/shall be doing will/shall have done will/shall have been doing should/would do should/would be doing should/would have done should/would have been doing review The workers are building the house. the workers. What are the workers doing ？ The house is being built by 主语 谓语 宾语 The workers are building the house 宾语 主语 谓语变被动 （时态不变） be+being+done+by Someone is hunting African elephant. someone . African elephant is being hunted by 主语 谓语 宾语 Someone is hunting African elephant 宾语 主语 谓语变被动 （时态不变） be+being+done+by ( ) They are hunting Tibetan antelopes. them . Tibetan antelopes are being hunted by 主语 谓语 They are hunting Tibetan antelopes 宾语 主语 谓语变被动 （时态不变） be+being+done+by 宾语 ( ) 3. 主动语态变被动语态的原则 “三变” 例：They are building nine parks. 原句主语变为by短语 宾语变为主语 谓语由主动变为被动 “三不变” 原句意思不变 原句时态不变 原句主谓宾以外成分不变 Nine parks ______________ by them. How many parks ____________? are being built are being built 2. 结构 1）肯定形式：am/is/are＋being＋过去分词 The house is being painted. 2）否定形式: am/is/are＋not＋being＋过去分词 The trees are not being watered. 3）一般疑问形式: Am/Is/Are＋主语＋being＋过去分词？ Am I being watched over? 4）特殊疑问句的形式: 特殊疑问词＋am/is/are＋主语＋being＋过去分词？ How many bridges are being built in the village? 1．表示此时此刻正在进行的被动动作。 2．表示现阶段正在进行的被动动作 (该动作在说话的瞬间未必正在进行。) My sister is now being interviewed. Many interesting experiments are being carried out these days.(说话时，并不一定正在进行) 3．表示一种经常性的被动行为，常和always，constantly 等表示频度的副词连用，这种用法常常带有赞扬或厌恶的感情色彩。 He is always being praised by the leader. 3. 用法 2．可与部分情态动词连用，表示对正在发生的事情的推测。 She may be being punished by her mother. My computer is under repair.＝My computer is being repaired. 1.动词＋介词构成的短语用于现在进行时的被动语态时, 其中的介词不可省略。 The ways to stop illegally hunting are being talked about. 4．某些表示“状态、心理活动、存在”等的动词，如have，want，need，love，一般不用现在进行时的被动语态，而常用一般现在时的被动语态。 With the population increasing，more land is needed. 5．“be＋under/in＋n.”可表示现在进行时的被动意义。 They are being hunted, illegally, for their valuable fur. Much is being done to protect wildlife. am/is/are being done 现在进行时被动语态 am/is/are done 一般现在时主动语态 am/is /are doing 现在进行主动语态 12 Present Continuous Passive Voice 2 Liu Tao would like to express his concern over the wetland in his hometown. Help him finish the passage with the present continuous passive voice of the verbs in brackets. In the wetland of my hometown, there are many different kinds of animals, including wild birds, fish, snakes, insects and so on. When I was in primary school, I often went there with my friends to watch the birds and study them. That was an interesting place for all of us. But things have begun to change in recent years. Small birds ____________ (catch) with nets. Wild ducks ____________ (sell) at food markets. Fish and snakes ____________ (kill) for food in restaurants. And even worse, the wetland ______________ (destroy). Some part______________(cover) with new houses. You can see rubbish everywhere. The wetland _____________ (pollute) seriously every day. I am very woried about it. What can we do? are being caught are being sold are being killed is being destroyed is being polluted are being covered Production In groups, discuss the questions below. Prepare to give a presentation of your ideas to the class. 1. What do you know is being done in your neighbourhood to protect animals and plants? 2. What suggestions do you have? Useful Expressions: ...is (are) being protected. It is good for... It's a wonderful habitat for... It makes our environment more ... Sample Conversation A: What is being done in our neighbourhood to protect animals and plants? B: Well, the old trees in the park are being protected. A: Oh yes. They are being protected not only because they are very old but also because they are the natural habitat for songbirds. D: Yes, that would certainly help make the air cleaner for them. C: That's right. Perhaps they could help protect the birds by making the roads around the park free from cars. 现在进行时的被动语态的基本结构 肯定结构 be(am/is/are)being done 否定结构 be(am/is/are)+not+being done 一般疑问结构 be(am/is/are)+主语+being done 特殊疑问结构 特殊疑问词+be(am/is/are)+主语+being done Summary Bye-bye! 19 $