Unit 5 Period 2 Using language（课件）英语外研版2019选择性必修第一册

高中英语外研版2019选择性必修第一册 Period 2 ：Using language Unit 5 Revealing nature Learning objectives 1. Students can master the structure and usage of the past perfect tense, and correctly apply it to describe past - in - past actions related to nature exploration and biodiversity. 2. Through learning materials about biodiversity, students will be able to understand and express relevant knowledge in English, enhancing language communication skills. 3. By analyzing background knowledge and adding supplementary information, students can improve reading comprehension and information - organizing abilities. 4. Students can develop awareness of biodiversity protection and learn to use English to advocate for environmental conservation in daily life. Contents 1. Lead in 2. Presentation 3. Listening 4. Speaking 5. Summary 6. Assessment 7. Homework 01. Lead in Lead-in Lead in What do you think of when you see these pictures? What is biodiversity? 02. Presentation What do they have in common? Which action happened first? What do they have in common? By eight o’clock last night, I had finished my homework. She had been waiting for the bus over an hour when I finally arrived. I had thought he would come to the party, but he didn’t show up. I had hardly stepped into the classroom when the bell rang. 基本用法 1 1. 表示在过去的某一时间或某一动作之前完成的动作。(过去的过去) now past future 过去完成时 had finished By eight o’clock last night, I had finished my homework. 基本用法 2 表示一个动作或状态在过去的某一时刻之前就已经开始，一直持续到过去的这一时刻，并且到那时还未结束，仍有可能再继续持续下去，常用的时间状语有by then, by the end of, by the time. She had been waiting for the bus over an hour when I finally arrived. now past future 过去完成进行时 had been waiting 基本用法 3 hope，mean，want，think，expect，suppose，intend，plan 等词的过去完成时表示未实现的想法、希望、打算或意图，意为“本来...（但事实上没有）” I had thought he would come to the party, but he didn’t show up. now past future 过去完成时 had thought 基本用法 4 在句型hardly...when 和 no sooner...than 中，主句用过去完成时，从句用一般过去时，表示“一......就......” Hardly had I left when it began to rain. 我刚离开就开始下雨了。 No sooner had he sat down than the phone rang. 他刚坐下，电话铃就响了。 Complete the paragraphs with the information from the given sentences. a. Natural disasters led to food shortages in the 1960s. b. Yuan Longping began to do research on hybrid rice. c. Yuan Longping developed a better type of rice. Yuan Longping _____________to do research on hyarid rice because natural disasters______________food shortages in the 1960s. In the end, he ____________ a better type of rice. began had led to developed 1 Complete the paragraphs with the information from the given sentences. Gregor Mendel chose to study pea plants because their characteristics were easy to control. Gregor Mendel made important discoveries about genetics. Gregor Mendel died in 1884 Gregor Mendel ___________study pea plants because their characteristics were easy to control. By the time of his death in 1894, he ___________________discoveries about genetics. chose to had made important 2 Complete the online encyclopedia entry with the correct form of the words in the box. Lonesome George was the last Pinta Island tortoise. He died in 2012. After George’s death, the Pinta Island tortoise was declared extinct. Lonesome George 百科全书条目 Complete the online encyclopedia entry with the correct form of the words in the box. compete decline eat live introduce arrive The extinction of the Pinta Island tortoise is blamed on humans. Before humans __________ on the island, the species ___________in isolation and ___________ the plants that naturally grew there. George was discovered many years after their arrival, and by then humans ______________ new species that _________ for the food the tortoises ate. After goats in particular had been brought to the island, the Pinta Island tortoise population ____________. Eventually, only George remained. arrived had lived eaten had introduced competed declined Look for more sentences with the past perfect tense in the reading passage. It was a young man who had left medical school without completing his degree. .. he had recently received a letter from his father predicting that he would be “a disgrace to yourself and all your family. 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. At that time, people believed that all species had appeared on Earth at the same time, and had not changed since. It seemed their beaks had evolved according to what food was available on that particular island. Over time, it had slowly evolved into many new species. practice ! Jane _________ (watch) a nature film on TV when someone knocked on the door. On our trip to Africa last year, we __________(see) lions sitting in the tall grass watching us. The girl, when _________ (question) why she _________ (cheat) in the exam, just lowered her head and kept silent. The boy _________ (cry) loudly because he _________ (lose) his way in the jungle and thought he couldn’t go back home. The young man insisted he _________ (do) nothing wrong and that the police _________ (release) him． By the end of last year, another new hospital _________ (complete) in our city. was watching saw questioned had cheated cried had lost had done release had completed 03. Listening While-listening Listen to the podcast and choose the statements that are made. 1 Biodiversity is important. 2 Bacteria are always harmful to humans. 3 Some species of bacteria are used in food production. 4 Many species of bacteria recycle dead organic matter. 5 Our immune systems are able to fight off all germs. √ √ Listen again and complete the fact sheet. While-listening Cells • Every living thing is 1 _________________________. They are like 2 _____________________________________. • In the human body there are about 3 _____________________ human cells and around 4 _____________________ bacteria cells. Bacteria • Most bacteria in the human body can 5 ___________________. • In the food production process, bacteria can 6 _________________ dead organic matter. made up of cells bricks that are used to build houses thirty trillion thirty-nine trillion help with digestion break down What do you know about cells and bacteria? Post-listening Pair work 内皮细胞 胰腺细胞 Post-listening Complete the boxes with the expressions from the podcast. ① Do you know about…? ② Have you heard of…? ③ By the way, ... ④ In fact, ... ⑤ Actually, ... ⑥ Speaking of which, ... Checking background knowledge Adding information 1 2 4 5 6 3 Read the passage and answer the questions. Earth is home to millions of different species. Some can be very small, like bacteria and viruses, which are so small that we cannot see them with only our eyes. By contrast, the largest animal species so far found on our planet is the blue whale, which can grow up to almost 30 metres in length and weigh over 130,000 kilos. The toughest species is probably the water bear. This tiny organism can survive temperatures from 150 ℃ to a below freezing -272 ℃. To best survive in their environment, each species has developed its own unique physical characteristics. Each year, scientists identify around 15,000 new species. However, diversity on our planet is such, that there are still millions of species on Earth remaining to be discovered. 1 What species are mentioned and what is special about them? 2 What other unusual life forms do you know of? 1 Two species are mentioned: the blue whale and the water bear. The blue whale is the largest animal species on earth, which can grow up to almost 30 metres in length and weigh over 130,000 kilos. The water bear is probably the toughest species, which can survive temperatures from 150℃ to a below freezing -272℃. Complete the paragraphs with the correct form of the words and expressions in the box. ancestor scientific be native to primitive habitat appearance be home to ecosystem The Galápagos Islands are renowned worldwide for their unique biodiversity. The Giant Tortoise Reserve on Santa Cruz 1 ____________ several species of giant tortoise that 2 _________ the Galápagos Islands. The island is also home to the Charles Darwin Research Station, where 3 ____________studies are carried out. is home to are native to scientific Complete the paragraphs with the correct form of the words and expressions in the box. ancestor scientific be native to primitive habitat appearance be home to ecosystem Mangroves are one of the coastal plants that grow on Isabela. They serve as the 4_____________ for various birds and fish, and are very important to the 5_________. habitats ecosystem Complete the paragraphs with the correct form of the words and expressions in the box. ancestor scientific be native to primitive habitat appearance be home to ecosystem Lguanas can be found on San Cristóbal. They have a very special 6_________, with comb-like spines on their back. There is evidence that all the different iguanas have developed from more 7___________ ones and share a common 8_____________. appearance primitive ancestor 04. Speaking Pair work Talk about biodiversity in China. 05. Summary Lead-in Summary 06. Assessment Lead-in Assessment Learning Objectives Score(1-5) 1. 过去完成时的用法 2.与生物多样性相关的词汇和表达方式 3.听力技巧、口语表达功能、阅读策略和写作要点等 5-完全能；4-基本能；3-不确定；2不太能；1-完全不能 07. Homework Lead-in Homework Protecting Biodiversity: Our Responsibility Thank you for your listening 2022 Blues 216281.05 $$