Unit 5 Period 2 Using language（课件）英语外研版选择性必修第二册

Unit 5 A delicate world 高中英语外研版选择性必修第二册 Using language 1.7.2013 Click to add text ‹#› Learning objectives Guide students to compare sentences from the reading passage, and understand the structure and pragmatic function of "it" as an empty object Enable students to use "verb + it + adj./n. + to do" and "verb + it + adj. + that clause" to express judgements and opinions in real ecological contexts. 1.7.2013 Click to add text ‹#› Contents 1. Lead-in 2. Presentation 3. Practice 4. Production 5. Summary 6. Homework 1.7.2013 Click to add text ‹#› 01. Lead-in 1.7.2013 Click to add text ‹#› Lead-in Lead-in Observe the following sentences 1 Look at the sentences and answer the questions. Sentences (a) and (c) are from the reading passage. a No visitor would think it surprising that the island is a UNESCO World Heritage Site. b No visitor would think that the island being a UNESCO World Heritage Site is surprising. c Experts felt it necessary to come up with a plan to remove all the rabbits from the island. d Experts felt to come up with a plan to remove all the rabbits from the island was necessary. 1.7.2013 Click to add text ‹#› 02. Presentation 1.7.2013 Click to add text ‹#› Lead-in Presentation Answer the questions Q2: What is the difference between the sentences in each group? Why does the author choose (a) and (c) instead of (b) and (d)? In (a) and (c), "it" is used as an empty object and the real object is moved to the end of the sentence; in (b) and (d), the real object comes first. The author uses (a) and (c) because the real object is too long; putting "it" after the verb keeps the sentence balanced and makes it more natural to read. 1.7.2013 Click to add text ‹#› Lead-in Presentation Answer the questions Q1: What does "it" refer to in sentences (a) and (c)? a No visitor would think it surprising that the island is a UNESCO World Heritage Site. b No visitor would think that the island being a UNESCO World Heritage Site is surprising. c Experts felt it necessary to come up with a plan to remove all the rabbits from the island. d Experts felt to come up with a plan to remove all the rabbits from the island was necessary. It does not refer to anything. It is an empty object standing for the real object at the end of the sentence — "that the island is a UNESCO World Heritage Site" in (a) and "to come up with a plan to remove all the rabbits from the island" in (c). 1.7.2013 Click to add text ‹#› Presentation Discover the rule Type Structure Example Structure 1 to do Experts felt it necessary to remove the rabbits. Structure 2 that 从句 Visitors think it surprising that the island is a World Heritage Site. verb + it + adj./n. + to do verb + it + adj. + that 从句 1.7.2013 Click to add text ‹#› 03. Practice 1.7.2013 Click to add text ‹#› Practice Rewrite the underlined parts using "it" as an empty object. 1. Many people think keeping this turtle as a pet is a good idea. 2. Some owners believe to release them into the wild is no big issue. 3. People have found to release these turtles into the wild is a threat to other species. 4. Experts consider owners keeping their pets in an enclosed area important. 1.7.2013 Click to add text ‹#› Practice Answers 1. Many people think it a good idea to keep this turtle as a pet. 2. Some owners believe it no big issue to release them into the wild. 3. People have found it a threat to other species to release these turtles into the wild. 4. Experts consider it important for owners to keep their pets in an enclosed area. 1.7.2013 Click to add text ‹#› 04. Production 1.7.2013 Click to add text ‹#› Production Describe the changes Example: Saihanba Picture 1 (1960s): a desert with few trees. Experts found it impossible to grow trees on the dry land. Picture 2 (present day): a vast forest with clear lakes. Workers made it a breakthrough to transform a desert into a forest. I think it likely that more people will join the conservation work. Your turn: Work in pairs. Describe how Saihanba has changed using at least 3 sentences with "it" as an empty object. Useful words: breakthrough, impossible, likely, unrealistic, grow, plant trees, transform... Then describe a place you know has changed. 1.7.2013 Click to add text ‹#› 05. Summary 1.7.2013 Click to add text ‹#› Summary "It" as an empty object (形式宾语) 当真正的宾语是to do或that从句且过长时，我们使用“it”作为动词后的形式宾语，并将真正的宾语移到句尾。 Structure 1: verb + it + adj./n. + to do sth. Structure 2: verb + it + adj. + that 从句. 常见动词: think, feel, find, consider, make, believe... 功能: 使句子更加平衡 1.7.2013 Click to add text ‹#› 06. Homework 1.7.2013 Click to add text ‹#› Homework Homework 1 (Option A) 假如你是李华，你的英国笔友Tom正在研究中国生态保护，来信向你询问塞罕坝（Saihanba）从荒漠到林海的故事，请你回复邮件。 内容包括： 1. 塞罕坝的变化； 2. 你的感悟； 3. 邀请他有机会来看一看。 要求： 1. 词数80左右； 2. 至少使用2处it作形式宾语； 3. 邮件格式规范。 1.7.2013 Click to add text ‹#› Homework Sample answer 1 Dear Tom, I'm glad you're studying China's ecological protection. Let me tell you about Saihanba. Decades ago, it was a desert. Now it has turned into a vast forest. We find it amazing that workers created such a wonder with great efforts. They made it possible to stop sandstorms and improve the local environment. I think you will love it. I sincerely invite you to visit Saihanba in person. Yours, Li Hua 1.7.2013 Click to add text ‹#› Homework Homework 2 (Option B) 假如你是李华，学校英文报社开设"Protecting Our Delicate World"专栏，请你结合麦夸里岛或塞罕坝的故事投稿。 内容包括： 1. 故事给你的启示； 2. 你将如何行动。 要求： 1. 词数100左右； 2. 至少使用3处it作形式宾语； 3. 行文连贯，可适当增加细节。 1.7.2013 Click to add text ‹#› Homework Sample answer 2 Protecting Our Delicate World The story of Macquarie Island teaches us it important to think carefully before introducing new species. Human interference can cause ecological chaos that takes decades to repair. I think it our responsibility to protect the environment around us. I consider it necessary to learn more about local ecosystems and refuse to release pets into the wild. It is also a good idea to join conservation volunteer activities. Only by respecting nature can we give our planet a healthy future. 1.7.2013 Click to add text ‹#› Thank you for your listening 1.7.2013 Click to add text ‹#› $