Unit 2 Wildlife Protection Period 4 Discovering Useful Structures 教案 -2026-2027学年人教版高中英语必修第二册

Unit 2 Wildlife Protection Period 4 Discovering Useful Structures 教案 Unit 2 Wildlife Protection Discovering Useful Structures 教案（含答案） 2026-2027学年 人教版高中英语必修第二册 课型：语法课 课时：1课时 一、教材分析 本节课是人教版高中英语必修第二册Unit 2 Wildlife Protection的第四课时，属于Discovering Useful Structures板块。本单元主题是野生动物保护，前三课时学生已经通过阅读课文A Day in the Clouds了解了藏羚羊保护的故事，接触了大量被动语态的句子。本节课在此基础上，系统学习现在进行时的被动语态（be + being + done）。这是被动语态各种时态里学生最容易出错的一个，因为多了一个being，学生要么漏掉being写成is done，要么be动词的人称和数跟主语对不上。教材通过观察、归纳、练习、输出四个环节，让学生从形式到功能逐步掌握。本节课的语法点不仅是考试高频考点，也为后续单元的阅读和写作打下基础。 二、学情分析 高一学生在初中已经学过一般现在时和一般过去时的被动语态，知道"be+过去分词"这个基本框架，所以现在进行时被动语态对他们来说不是全新的东西。但正因为有旧知识打底，学生最容易犯两个错：一是把现在进行时被动写成一般现在时被动（漏掉being，直接写is done），二是be动词的人称和数跟主语对不上。另外，学生对"现阶段正在被做"和"此时此刻正在被做"这两种功能区分不清，看到these days就条件反射用现在进行时，不去想句子到底说的是"正在做"还是"一直都这样"。写作方面，学生习惯用主动句，很少主动用被动，需要给他们真实的语境（比如身边的武汉长江大保护）让他们觉得被动句有用。 三、教学目标（核心素养） 1. 语言能力：学生能准确说出现在进行时被动语态的四种结构（肯定、否定、一般疑问、特殊疑问），并能在选择、改错、语篇填空和改写中正确运用，知道be+being+done中being不能丢。 2. 文化意识：学生能通过武汉本地环保语境（长江江豚保护、十年禁渔、东湖湿地修复），了解家乡在生态保护方面的努力，增强环保意识和文化自信。 3. 思维品质：学生能通过观察、归纳自主发现语法规律，能判断何时该用被动、何时不能用被动（如不及物动词短语take place无被动），培养逻辑思维和批判性思维。 4. 学习能力：学生能通过自主探究和合作学习掌握语法点，养成归纳总结的学习习惯，能在课后新闻阅读中主动关注现在进行时被动语态的用法。 四、教学重难点 【重点】 重点1：掌握现在进行时被动语态的结构 be + being + done，以及四种句式变化。（对应 Step 2） 重点2：通过选择填空和改错，巩固结构，避免漏掉being或be动词用错。（对应 Step 3 Activity 1、Activity 2） 【难点】 难点1：主动句变被动句时主谓一致和时态对应，尤其是不可数名词和复数名词做主语时be动词的选择。（对应 Step 3 Activity 3、Activity 4） 难点2：在真实语境中灵活运用，而不是只会做选择题。（对应 Step 4） 五、教学过程 Step 1 Lead-in & Observation (5 min) Teacher's instructions: "Good morning, everyone. Today we're going to learn a new grammar structure. First, please look at these three sentences about Wuhan. Fill in each blank with the correct form of the verb in brackets. Then discuss with your partner: what pattern do the three verbs share?" Students' activities: Students fill in the blanks on their own, then discuss with their partners what pattern the three verbs share, and try to work out be + being + done by themselves. Detailed content: 1. A new nature reserve ____________ (build) near East Lake in Wuhan these days. 2. The finless porpoises in the Yangtze River ____________ (watch) by researchers right now. 3. Many old buildings along the Yangtze River ____________ (pull) down to make room for green spaces. Question: What do the three sentences have in common? Write down the verb structure you find. 【设计说明】用武汉本地场景导入，学生有亲切感。三个句子分别用了these days和right now，为后面讲"现阶段"和"此时此刻"两种功能埋伏笔。让学生自己找规律，比老师直接讲结构印象深。 Step 2 Structure & Functions (10 min) [重点1] Teacher's instructions: "Now let's make the structure clear. Please complete the table on your own, and then we'll check together. After that, match each sentence with its function." Students' activities: Students complete the structure table individually, then the whole class checks it together. After that, they do the function-matching task and check with their partners. Detailed content: Activity 1 Complete the structure table. Form Structure Affirmative (肯定) Negative (否定) Yes / No question (一般疑问) Wh- question (特殊疑问) Activity 2 Match each sentence with its function. (1) The finless porpoise is being watched by researchers right now. (2) Many wetlands in Wuhan are being restored these days. (3) He is always being praised by his teacher for helping animals. (4) A new subway line across the Yangtze River is being built now and will open next year. A. Something is being done at this very moment. B. Something is being done during this period (not necessarily right now). C. A repeated passive action with an emotional tone (always / constantly). D. A planned action that is already in progress and will finish in the future. 【设计说明】结构表让学生自己填，老师只做核对，避免满堂灌。功能匹配的四个句子全部是武汉语境或学生熟悉的场景。第(4)句用"is being built now and will open next year"避免了现在进行时被动直接表将来的争议，同时保留了"计划中的未来动作"这一功能。 Step 3 Practice (15 min) [重点2 / 难点1] Teacher's instructions: "Now let's practice. We have four activities. Do Activity 1 and 2 on your own first, then check with your partner. For Activity 3, read the passage about Wuhan carefully — not every verb needs a passive form! Activity 4, rewrite the sentences in the present continuous passive voice." Students' activities: Students complete Activities 1-4 on their own and check with their partners. The teacher walks around, paying special attention to whether students leave out being or use the wrong form of be. Finally, the whole class checks the answers together, and the teacher goes over the questions with the highest error rates. Detailed content: Activity 1 Choose the correct verb form. 1. Don't enter the room. The walls ____________ (paint / are being painted). 2. — Where is your brother? — He ____________ (interviews / is being interviewed) by a reporter from Wuhan TV. 3. The Yangtze finless porpoise ____________ (protects / is being protected) by the 10-year fishing ban. 4. Many trees ____________ (plant / are being planted) along the riverbank this spring. 5. The problem of water pollution ____________ (discusses / is being discussed) at the meeting now. 6. Be quiet! The final exam ____________ (is held / is being held) in the next room right now. Activity 2 Find and correct the mistakes. (Each sentence has one error.) 1. The pandas are feed by the keepers at the moment. ____________ 2. A new bridge is build over the Yangtze River these days. ____________ 3. The wild birds are being protect by the volunteers in the wetland. ____________ 4. Is the meeting been held in Room 301 now? ____________ 5. Many animals is being killed for their fur. ____________ Activity 3 Fill in the blanks with the correct form of the verb in brackets (active or passive). Read the short passage about Wuhan and fill in each blank. Note: not every verb needs a passive form! Great changes ____________ (take) place in Wuhan these days. The Yangtze River ____________ (clean) by a huge project. Old factories along the river ____________ (move) away, and more green parks ____________ (build) in their place. The finless porpoise, once rarely seen, ____________ (spot) more often in the Wuhan section of the Yangtze. At the same time, some old streets ____________ (protect) as cultural heritage sites. We are happy to see that our city ____________ (become) greener and more beautiful. Activity 4 Rewrite the sentences in the present continuous passive voice. 1. The government is building a new wetland park in Wuhan. → ____________________________________________ 2. Volunteers are cleaning the riverbank this weekend. → ____________________________________________ 3. They are not cutting down the trees by the lake. → ____________________________________________ 4. Is the city improving public transport? → ____________________________________________ 5. What are people doing to save the finless porpoise? → ____________________________________________ 【设计说明】四个活动由易到难：选择→改错→语篇填空→改写。Activity 2改错专门打学生最容易犯的错（漏being、be动词单复数错、been和being混）。Activity 3故意埋了两个主动语态的坑（take place和is becoming），逼学生判断该不该用被动，而不是见空就填被动。Activity 4改写训练主动变被动的完整流程。 Step 4 Production (5 min) [难点2] Teacher's instructions: "Now it's your turn to write. Work in pairs. Write 3 sentences about what is being done in Wuhan right now or these days to protect the environment. Use the present continuous passive voice. You can use the example to help you." Students' activities: Students work in pairs to discuss and write 3 sentences. Each pair picks a representative to read their sentences aloud, and the whole class checks whether the grammar is correct and the content is relevant. Detailed content: Example: More trees are being planted along the Yangtze River this spring. 1. ____________________________________________ 2. ____________________________________________ 3. ____________________________________________ 【设计说明】输出环节回到武汉本地语境，让学生觉得语法有用。两人合作降低难度，代表朗读加全班点评，既练了写又练了说。老师重点听being有没有丢、be动词单复数对不对。 Step 5 Summary & Homework (5 min) Teacher's instructions: "Today we learned the present continuous passive voice: be + being + done. Remember, being cannot be left out! And not every verb can be used in the passive — take place, for example, has no passive form. For homework: first, write a short passage of 50-70 words about what is being done to protect the Yangtze River in Wuhan, using at least three present continuous passive sentences. Second, find a recent English news article and underline all the present continuous passive sentences you can find, then copy them down and translate them into Chinese." Students' activities: Students review the structure and common mistakes with the teacher, and write down the homework. 【设计说明】最后5分钟总结结构和易错点，强调being不能丢、不及物动词短语没有被动。作业分两项：写作和新闻阅读，兼顾输出和输入。 六、板书设计 Present Continuous Passive Voice Structure: be (am / is / are) + being + done Functions: ① at this very moment → right now ② during this period → these days ③ repeated + emotion → always being done ④ in progress, future finish → being built now, will open next year Common mistakes: ✗ is done (漏being) ✓ is being done ✗ is been done (been/being混) ✓ is being done ✗ take place → are being taken ✓ are taking (不及物动词短语无被动) 七、教学反思 【优点】 1. 导入和练习全部用武汉本地语境（东湖、江豚、长江大桥、十年禁渔），学生有代入感，不会觉得语法是干巴巴的规则。 2. Step 1让学生自己观察归纳结构，而不是老师直接讲，学生自己找出来的规律比老师灌的记得牢。 3. Activity 2改错和Activity 3语篇填空专门针对学生最容易犯的错（漏being、be动词单复数错、不及物动词误用被动），练习有针对性，不是题海。 4. 四个练习由易到难（选择→改错→语篇→改写），最后有输出环节，学生不只是会做选择题，还能自己写出来。 【可改进之处】 1. Step 3练习量偏大，15分钟可能做不完四个活动。实际教学中可根据学生基础灵活调整，基础较弱的班级可把Activity 4改写留到课后，课堂只做前三个。 2. 板书设计里"不及物动词短语无被动"只举了take place一个例子，实际授课时可补充happen、appear、belong to等常见的，让学生有更完整的认识。 参考答案 Step 1 1. is being built 2. are being watched 3. are being pulled Common structure: be (am / is / are) + being + past participle (done) Step 2 Activity 1 结构表 Affirmative: am / is / are + being + done Negative: am / is / are + not + being + done Yes / No question: Am / Is / Are + 主语 + being + done? Wh- question: 疑问词 + am / is / are + 主语 + being + done? Activity 2 功能匹配 (1)—A (2)—B (3)—C (4)—D Step 3 Activity 1 选择 1. are being painted 2. is being interviewed 3. is being protected 4. are being planted 5. is being discussed 6. is being held Activity 2 改错 1. are feed 改为 are being fed 2. is build 改为 is being built 3. are being protect 改为 are being protected 4. Is ... been held 改为 Is ... being held 5. is being killed 改为 are being killed（主语Many animals是复数） Activity 3 语篇填空 are taking; is being cleaned; are being moved; are being built; is being spotted; are being protected; is becoming 注意：第一空take place是不及物动词短语，没有被动语态，只能用主动are taking。最后一句is becoming也是主动，因为城市自己在变，不是被变。 Activity 4 改写 1. A new wetland park is being built in Wuhan (by the government). 2. The riverbank is being cleaned by volunteers this weekend. 3. The trees by the lake are not being cut down. 4. Is public transport being improved (by the city)? 5. What is being done to save the finless porpoise (by people)? Step 4 参考例句 1. The water of the Yangtze River is being cleaned up by a huge project. 2. More green parks are being built along the riverbank. 3. Old factories are being moved away from the city centre. 家庭作业 1. 开放写作，按是否正确使用了至少3个现在进行时被动句、内容是否扣题给分。 2. 开放任务，检查学生划出的句子是否真的是现在进行时被动语态（be+being+done）。 1 学科网（北京）股份有限公司 $