Unit 2 Wildlife Protection Discovering Useful Structures 教案-2024-2025学年高中英语人教版（2019）必修第二册

Unit 2 Wildlife Protection-Discovering Useful Structures 教学设计 教学目标 Language Ability: Master relative clauses with "which/that/who" and their usage in wildlife protection contexts. Cultural Awareness: Understand global wildlife conservation efforts and cross-cultural environmental values. Thinking Quality: Analyze relationships between clauses to logicalize arguments for protection. Learning Ability: Apply relative clauses in writing/speaking about wildlife issues independently. 重难点 Key: Correctly use relative pronouns "which/that/who" to modify nouns in context. Difficult: Distinguishing between restrictive and non-restrictive relative clauses; avoiding ambiguity in reference. 教学环节 学习活动 新课教学 Teacher: Good morning, class! In our previous lessons of Unit 2 Wildlife Protection, we've learned a lot about the current situations of wildlife. We know that many animals are in danger, and various efforts are being made to save them. Today, we are going to focus on a very important grammar structure - the present continuous passive voice, which is closely related to our topic of wildlife protection. Let's start with a simple review. You all know the present continuous tense, right? For example, we say "I am reading a book." Here, the action of "reading" is happening at the moment. And we also know the passive voice. For instance, "The book is written by a famous author." In this sentence, the focus is on the book, which is the receiver of the action "written." Now, what if we combine these two? That's what we are going to explore today - the present continuous passive voice. Look at these sentences on the screen: African elephants are being hunted. What is being done to help them? What measures are being taken to help them? Can you see something special about these sentences? Let's analyze the first one. "African elephants are being hunted." We have "are being hunted." Here, the African elephants are the subject, and they are the ones receiving the action of "hunting." And the action of "hunting" is happening continuously or at present. So, this is a typical example of the present continuous passive voice. Now, let's figure out the structure of the present continuous passive voice. From the sentences we just saw, we can summarize the positive form as: Subject + am/is/are + being + past participle. For example, in "African elephants are being hunted," "African elephants" is the subject, "are" is the form of "be" according to the subject, "being" is a key part of this structure, and "hunted" is the past participle of the verb "hunt." The negative form is: Subject + am/is/are + not + being + past participle. For instance, "The endangered species are not being protected effectively in some areas." Here, we use "are not being protected" to show the negative meaning that the protection action is not happening well. For the general question form, it is: Am/Is/Are + Subject + being + past participle? Like "Is more land being used for wildlife reserves?" We use this structure to ask whether an action is being carried out on the subject at present. And for the special question form, it is: Question word + am/is/are + Subject + being + past participle? Such as "What measures are being taken to stop the illegal hunting?" Here, "What measures" is the question word, and we are asking about the specific actions that are being taken. Now, let's think about the meaning of the present continuous passive voice. It is used to express that an action is being done to the subject at the present moment or around now. It emphasizes the ongoing nature of the passive action. For example, when we say "Many wild animals' habitats are being destroyed due to deforestation," we mean that right now, the habitats of wild animals are in the process of being destroyed. This helps us to focus on the current situation of the subjects (wild animals' habitats in this case) that are affected by the actions. Let's do some practice to make sure we understand this structure well. Here are some sentences, and you need to fill in the blanks with the correct form of the present continuous passive voice. Small birds ________ (catch) with nets. Wild ducks ________ (sell) at food markets. Fish and snakes ________ (kill) for food in restaurants. Let's check the answers together. For the first sentence, the correct answer is "are being caught." Because the small birds are the ones being caught, and this action is happening now. Similarly, for the second sentence, it should be "are being sold," and for the third one, "are being killed." Now, let's move on to a more comprehensive example. Listen carefully and fill in the blanks. In the wetland of my hometown, there are many different kinds of animals, including wild birds, fish, snakes, insects and so on. But things have begun to change in recent years. The wetland _______ (destroy). Some parts _______ (cover) with new houses. You can see rubbish everywhere. The wetland _______ (pollute) seriously every day. The answers are: "is being destroyed," "are being covered," and "is being polluted." In this passage, we can clearly see how the present continuous passive voice is used to describe the ongoing negative impacts on the wetland and the animals living there. Let's compare the present continuous passive voice with other related tenses and voices to have a better understanding. We know the present continuous tense, like "I am eating an apple." Here, the focus is on the subject performing the action. While in the present continuous passive voice, such as "The apple is being eaten by me," the focus shifts to the object (the apple) which is receiving the action. And compared with the simple present passive voice, for example, "The windows are cleaned every week" (simple present passive, which shows a general fact or routine), the present continuous passive voice emphasizes the action happening at the moment, like "The windows are being cleaned now." Now, let's relate this grammar structure to our topic of wildlife protection. We know that wildlife protection is a very urgent issue. There are many things that are being done and also many problems that are being faced. Let's have a group discussion. I will divide you into several groups. Each group needs to discuss and list some actions that are being taken to protect wildlife and some problems that wildlife are currently being faced with, using the present continuous passive voice. For example, "Endangered animals are being protected in nature reserves" (an action being taken) and "Wildlife habitats are being invaded by human activities" (a problem being faced). (After the group discussion) Okay, now let's invite each group to share their ideas. Group 1: We think that "Wild animals are being monitored by conservationists to ensure their safety" is an action being taken, and "Many rare species are being forced to leave their habitats because of climate change" is a problem. Teacher: Great! Very good examples. How about Group 2? Group 2: We have "New laws are being made to ban illegal hunting" as an action, and "Some animals are being starved due to the reduction of their food sources" as a problem. Teacher: Excellent! You all have a good understanding of how to use the present continuous passive voice in the context of wildlife protection. Now, let's do a writing task. I want you to write a short passage about the current situation of a certain kind of wildlife you are interested in. You need to use at least three sentences in the present continuous passive voice. You can describe the actions being taken to protect it, the problems it is being faced with, or both. (After the students finish writing) Let's ask some students to read out their passages. Student 1: Pandas are being carefully protected in many nature reserves. Their habitats are being expanded to provide more living space. However, pandas are still being affected by the decrease of bamboo forests due to climate change. Teacher: Wonderful! You have used the present continuous passive voice very accurately and clearly described the situation of pandas. How about another student? Student 2: Tigers are being hunted illegally for their skins and bones, which is a serious problem. Conservation organizations are being set up to raise awareness about tiger protection. Also, more anti - poaching measures are being implemented to stop the illegal hunting. Teacher: Well done! Your passage is not only grammatically correct but also shows a good understanding of the topic. In conclusion, today we have learned about the present continuous passive voice. We learned its structure, meaning, and how to use it in the context of wildlife protection. Remember, grammar is a tool to help us express ourselves better. By mastering the present continuous passive voice, we can more precisely describe the ongoing situations related to wildlife protection. I hope you can keep practicing and using this grammar structure in your future English learning and communication. And always keep in mind the importance of wildlife protection. That's all for today's class. Thank you! 学科网（北京）股份有限公司 学科网（北京）股份有限公司 学科网（北京）股份有限公司 学科网（北京）股份有限公司 $$