Unit 5 Period2 Using language（课件）英语外研版选择性必修第一册

该高中英语课件聚焦过去完成时的结构与用法，通过音频播客（关于地球最古老生命形式）和物种段落补全活动导入，结合生物多样性主题，搭建从主题感知到语法学习的情境支架，衔接后续时态分析与应用。 其亮点在于以达尔文进化论例句引导归纳时态功能，结合袁隆平、孟德尔等科学案例设计练习，培养语言能力与思维品质，小组演讲任务呼吁保护生物多样性，融入文化意识。采用情境导入、案例分析等方法，小结通过表格清晰呈现结构，助力学生语法应用与责任意识提升，教师可高效开展教学。

Unit 5 Revealing nature 高中英语外研版选择性必修第一册 Using language Learning objectives 1. Learn the structure and uses of the past perfect tense. 2. Read passages about wildlife and make sentences with the past perfect tense. 3.Realize the importance of protecting biodiversity. Contents 1. Lead in 2. Presentation 3. Practice 4. Production 5. Summary 6. Assessment 7. Homework 01. Lead in Every species is lovely and special! Enjoy different life forms on earth Lead in Listen to the podcast and answer the questions. 1.What is the oldest life forms on earth? 2.What kind of the oldest life form is mentioned in the material? bacteria microorganism Activity 1 Complete the paragraphs. is home to are native to scientific habitats ecosystem appearance primitive ancestor Word Bank Galapagos island 加拉帕戈斯群岛 Santa Cruz 圣克鲁斯岛 tortoise 陆龟 mangrove 红树 Isabela 伊莎贝拉岛 Iguana 鬣蜥 San Cristobal 圣克里斯托瓦尔岛 What species are there? What made them special? 02. Presentation ① Look at the sentences from the reading passage and answer the questions. 1. In sentence (a), which action happened first, “suspected” or “evolved from a common ancestor”? 2. In sentence (b), which action happened first, “refused to believe” or “evolved from lower forms of life”? 3. What does the structure had done indicate? It indicates the action happened before a certain past action. Now look for more sentences with the past perfect tense in the reading passage, and summarise its use in your own words. 1. It was a young man who had left medical school without completing his degree. 2. ... he had recently received a letter from his father predicting that he would be “a disgrace to yourself and all your family. 3. After Darwin had spent some time in South America, his room on the ship was crowed with samples of the plants and animals he had collected. 4. At that time, people believed that all species had appeared on Earth at the same time, and had not changed since. 5. It seemed their beaks had evolved according to what food was available on that particular island. 6. Over time, it had slowly evolved into many new species. 肯定句 主语＋had＋过去分词＋其他 否定句 主语＋ had＋not＋过去分词＋其他 一般疑问句 Had＋主语＋过去分词＋其他？ 特殊疑问句 特殊疑问词＋had＋主语＋过去分词＋其他？ Summary 过去完成时 形式: 功能: 过去时与现在时的不同: had done 过去某一时刻或某一动作之前已完成的动作或状态，也可以说是“过去的过去”。 时间参照不同 now past future 过去完成时 现在完成时 03. Practice Complete the paragraphs with the information from the given sentences. Activity 2 began had led to developed chose to had made Complete the online encyclopaedia entry with the correct form of the words. Activity 3 compete decline eat live introduce arrive had lived eaten had introduced competed declined arrived 04. Production Prepare a speech to call on people to help maintain the biodiversity! You should include the analysis of the current situation and measures to protect it. Try to use past perfect form. group work 05. Summary form：had done function： 1.过去某一时刻或某一动作之前已完成的动作或状态 2.过去某一时间之前发生的动作或存在的状态一直持续到那时，并可能继续下去 Summary past perfect 06. Assessment Lead-in Assessment Content Standards Starts(1-3) self-assessment Can I use past perfect form to compelete the sentennces ? ☆ ☆ ☆ mutual evaluation Does my partner's dialogue sound natural and smooth? ☆ ☆ ☆ 07. Homework Lead-in Homework 1.用过去完成时写出四个句子。 2.短文填空。 1. I had finished my homework before my mother came back. 2. He had left the city when we arrived. 3. She had read this book twice last year. 4. They had eaten dinner before it rained. How this could be done was a challenging question at the time. Yuan was    1    that the answer could be found in the creation of hybrid rice. A hybrid is a cross between two or more varieties of a species. One characteristic of hybrids is that they usually    2   a higher yield than conventional crops. However, whether it was possible to develop a hybrid of self-pollinating plants such as rice was a matter of great debate. The common    3    then was that could not be done. Through intense effort, Yuan    4    enormous technical difficulties to develop the first hybrid rice that could be used for farming in 1974. This hybrid enabled farmers to expand their    5    greatly. 答案：1．convinced 2．attain 3．assumption 4．overcame 5．output Thank you for your listening Lavf58.20.100 22 Unit 5-2 FLTRP 英语选择性必修第一册 2019 Other 216072.05 $