Unit 5 Revealing nature Using language 课件-2024-2025学年高中英语外研版（2019）选择性必修第一册

null Unit 5　Revealing nature Using language 1 PART Ⅰ GRAMMAR Learning aims 1.To deal with the grammar of the unit—past perfect. 2. To talk about biodiversity. 3. To master the words and phrases in this part. 4. To deal with the listening part. 过去完成时基本结构 基本结构：had done 否定句式：had not done 一般疑问句：Had…done…? 过去完成时基本用法 (1) 过去完成时表示过去某一时刻或某一动作之前已经完成或发生的动作或状态，即“过去的过去”。句中常用by, before, until, when, by the time等词引导的时间状语。 I had just finished half of the work by yesterday. 注意：在包含before和after的复合句中，因为从句动作和主句动作发生的先后顺序已经非常明确，可以用一般过去时替代过去完成时。 The train ________(start) before I reached the station. started 过去完成时基本用法 (2) 表示未曾实现的愿望、打算、意图、诺言等。常用had hoped/planned/meant/intended/thought/expected/supposed等或用动词的过去分词接不定式完成时表示，即“hoped/planned…+to have done”。 I had intended to meet him at the airport, but I had an important meeting to attend. =I intended to have met him at the airport, but I had an important meeting to attend. 我本打算去机场接他，但是我有个重要的会议要参加。 过去完成时基本用法 (3) 用于if引导的和过去事实相反的虚拟语气以及wish, as if 引导的从句中，表示与过去事实相反的假设。 I wish I had gone with you to the concert. 我希望我原本和你去了音乐会。 If you had followed my advice, you would have succeeded. 要是你以前听从了我的建议，你本会成功的。 过去完成时基本用法 (4) 特殊句型： hardly/scarcely…when…/no sooner…than… It was the first/last…time + that 从句 By the time+表过去时间的从句+主句（主句用过去完成时） By the end of+表示过去的时间+主句（主句用过去完成时） 过去完成时基本用法 No sooner had he sat done than the telephone rang. 他刚坐下电话就响了。 It was the first time that I had chatted in English on the Internet. 这是我第一次在网上用英语聊天。 By the time I got to the station, the train had already left. 到我到达车站时，火车已经离开了。 练习：用所给词的适当形式填空 1. She asked me whether I ____________(return) the books to the library, and I admitted that I hadn’t. 2. I _________(be) at the bus stop for 20 mins when a bus finally came. 3. —— Did you enjoy the party? ——Yes, We _________________(treat) well. 4. I wish I ____________(be) at my sister’s wedding last Tuesday, but I was on a business trip in New York then. had returned had been had been treated had been 练习：用所给词的适当形式填空 5. By the time I got to school, the first play __________(be) on for nearly half an hour. 6. If the safe system _____________(put) to use, the accident would never have happened. 7. No sooner _____ I reached home than it began to rain. 8. It was the first time that I ______________(take) part in the English Speech Contest. had been put had had taken had been Complete the paragraphs with the information from the given sentences. The sentences are in the order in which they happened. They can help you to decide the use of tenses.   1 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 hybrid rice because natural disasters ___________ food shortages in the 1960s. In the end, he ___________ better type of rice. had led to began developed Complete the paragraphs with the information from the given sentences. The sentences are in the order in which they happened. They can help you to decide the use of tenses.   2 a. Gregor Mendel chose to study pea plants because their characteristics were easy to control. b. Gregor Mendel made important discoveries about genetics. c. Gregor Mendel died in 1884. Gregor Mendel _________ study pea plants because their characteristics were easy to control. By the time of his death in 1884, he _________ important discoveries about genetics. had made chose to PART Ⅱ READING COMPREHENSION What species are mentioned and what is special about them? 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 following words and expressions. ancestor scientific be native to primitive habitat appearance be home to ecosystem The Galapagos islands are renowned worldwide for their unique biodiversity. The Giant Tortoise Reserve on Santa Cruz __________ several species of giant tortoise that ____________ the Galapagos islands. The island is also home to the Charles Darwin Reseach Station, where __________ studies are carried out. is home to are native to scientific Complete the paragraphs with the correct form of the following words and expressions. 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 ___________ for various birds and fish, and are very important to the ____________. habitats ecosystem Complete the paragraphs with the correct form of the following words and expressions. ancestor scientific be native to primitive habitat appearance be home to ecosystem lguanas can be found on San Cristobal. They have a very special __________, with comb-like spines on their back. There is evidence that all the different iguanas have developed from more __________ ones and share a common ___________. appearance primitive ancestor Words 1. ____________ n. 特征，特点 → _____________ adj. 特有的，典型的 2. ____________ v. 减少，下降→ _____________ n. 减少，下降 3. ____________ v. 责怪，指责 → _____________ n. 责任，责备 4. ____________ adj. 巨大的，特大的 → __________ n. 巨人，伟人 characteristic decline blame giant characteristic decline blame giant Words 5. ________ n.陆龟 6. ________ n. 山羊 7. ________ adj. 原始的，低等的 8. ________ adv. 遍及全世界地 9. ________ n. 红树（一种热带树木） 10. ________ n. 鬣 11. ________ adj. 梳状的 12. ________ n.（动植物的）刺，刺毛 tortoise goat primitive worldwide mangrove iguana comb-like spine Phrases 1. 对……有害 __________________ 2. 击退，抵抗 __________________ 3. 顺便说一下 __________________ 4.充当 __________________ 5. 说到，谈及 __________________ be harmful to… fight off by the way serve as speaking of Phrases 6. 是……的家园 __________________ 7. 相比之下 __________________ 8. 到目前为止 __________________ 9.长度上 __________________ 10.源于……的 __________________ 11.执行，实行 __________________ be home to…. by contrast so far in length be native to…. carry out PART Ⅲ 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 notes. Cells Every living thing is1__________________. 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 thirty trillion help with digestion break down bricks that are used to build houses thirty-nine trillion While listening and taking notes, you need to pay attention to some expressions to understand the context better. Do you know about...? Have you heard of…? By the way,.… Actually,… In fact,... Speaking of which,… Thanks 22 Unit 5-2 FLTRP 英语选择性必修第一册 2019 Other 456657.16 $$