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

感谢您下载平台上提供的PPT作品，为了您和以及原创作者的利益，请勿复制、传播、销售，否则将承担法律责任！将对作品进行维权，按照传播下载次数进行十倍的索取赔偿！ Unit 5 Revealing nature Using language 感谢您下载平台上提供的PPT作品，为了您和以及原创作者的利益，请勿复制、传播、销售，否则将承担法律责任！将对作品进行维权，按照传播下载次数进行十倍的索取赔偿！ Revision: By nine o'clock last night, we _________ (get) 200 pictures from the spaceship. I _________ (be) at the bus stop for 20 minutes when a bus finally came. He said he ____________ (work) in that factory since 1949. I didn't know these words, for I ______________ (not study) my lesson. We _______ (learn) over two thousand English words by the end of last term. had got had been had had worked had not studied Fill in the blanks with the correct forms of the words in the brackets. 1. At that time, people believed that all species had appeared on Earth at the same time. 2. Darwin suspected that the finches had evolved from a common ancestor. 3. Many people refused to believe that living things had evolved from lower forms of life. Observation 1 以上句子中，主句谓语动词用____________, 从句谓语动词用______________. 两个谓语动词间的关系为______________________________________. 一般过去时 过去完成时 从句谓语动作先于主句谓语动作发生 结论：当动作发生在过去的过去，谓语动词用_________________. 过去完成时 Observation 2 1. I had finished my homework before I had supper. 2. John and Jane had not known each other for a long time before they got married. 3. The work had been finished by us by last Friday. 过去完成时的基本构成： 主动式： 否定式： 被动式： had done had not/never done had been done Usage 1)表示在过去某个时间或动作之前已经完成或结束的动作。句中常有by、by the end of等介词(短语)和by the time、before、when、until等引导的状语从句，也可以通过一个表示过去的动作或上下文来表示。 1. By eight o'clock last night, we had finished most of the work. 2. By the end of last week，they had finished the work. 3. By the time he was 14, Mozart had composed many pieces for the harpsichord, piano and violin, as well as for orchestras. 4. Einstein had learned advanced maths before he went to college. 5. I found the lecture hard to follow because it had started when I arrived. 6. I had waited until he finished his homework. 2)用于宾语从句、状语从句和定语从句中。表示主句和从句发生的动作有先后关系，动作发生在前的，用过去完成时，动作发生在后的，用一般过去时。 1. She said that she had finished her homework. 2. During his stay in Xi’an, Jerry tried almost all the local foods that his friend had recommended. 3. I didn’t go to see the movie The Gold Rush because I had seen it twice. 3) hope, mean, want, think, expect, plan, intend, suppose 等动词的过去完成时可以用来表示过去未曾实现的想法、希望、打算或意图，意为“本来……(但事实上并没有……)”。 1. I had hoped to send Peter a gift to congratulate him on his marriage, but I couldn't manage it. 2. I had meant to call on you, but I had an unexpected visitor. 3. They had wanted to help but couldn’t get here in time. 4. We had intended to come and see you. 4) 在虚拟语气中，对过去事实的虚拟，从句谓语用过去完成时。 1. If he had seen you yesterday, he would have asked you about it. 2. If you had come earlier, you would have met him． 3. I would have called you if I had known your telephone number． 5) 常用过去完成时的固定句型： ①在no sooner...than、hardly...when句型中，主句用过去完成时，从句用一般过去时，意为“一……就……；刚……就……”。 1. I had no sooner got home than it began to rain. (＝No sooner had I got home than it began to rain.) 2. I had hardly stepped into the classroom when the bell rang. (＝Hardly had I stepped into the classroom when the bell rang.) ②在“It was the first/second/...time＋that...”句型中, 从句用过去完成时, 意为“那是第几次…”。 It was the first time that I had chatted online in English. ③在“It was＋一段时间＋since 从句”句型中，从句用过去完成时，意为“自……发生以来已经多长时间了”。 It was at least three months since I had left Beijing. Differences between past perfect, simple past tense and present perfect 1. 一般过去时侧重发生在过去的客观事实；而过去完成时强调动作发生在“过去的过去”，一定有一个表示过去的参照点。 ① I met her at the airport yesterday. I hadn't seen her for five years since she went abroad. ② He once worked on a farm for 10 years, and now he is the manager of the company. 2. 现在完成时与过去完成时的区别。 现在完成时表示延续到现在或对现在有影响的动作，而过去完成时表示的是在过去某一事件发生之前已经完成或延续到过去某时的动作(句中有表示过去特定时间的状语)。 1. I have learnt English for 19 years. 2. By 2015, I had learnt English for 10 years. 感谢您下载平台上提供的PPT作品，为了您和以及原创作者的利益，请勿复制、传播、销售，否则将承担法律责任！将对作品进行维权，按照传播下载次数进行十倍的索取赔偿！ Do Activity 5 on Page 71. 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. 感谢您下载平台上提供的PPT作品，为了您和以及原创作者的利益，请勿复制、传播、销售，否则将承担法律责任！将对作品进行维权，按照传播下载次数进行十倍的索取赔偿！ Do Activity 6 on Page 71. Listen again and complete the fact sheet. Suggested answers: made up of cells Bricks that are used to build houses thirty trillion Thirty-nine trillion help with digestion Break down 感谢您下载平台上提供的PPT作品，为了您和以及原创作者的利益，请勿复制、传播、销售，否则将承担法律责任！将对作品进行维权，按照传播下载次数进行十倍的索取赔偿！ Do Activity 7 on Page 72. Complete the boxes with the expressions from the podcast. Do you know about…? Have you heard of…? By the way,… Actually,… In fact,… Speaking of which,… 感谢您下载平台上提供的PPT作品，为了您和以及原创作者的利益，请勿复制、传播、销售，否则将承担法律责任！将对作品进行维权，按照传播下载次数进行十倍的索取赔偿！ Do Activity 8 on Page 72. Read the passage and answer the questions. 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 150C to below freezing -272℃. The blue whale The water bear Language exploration 感谢您下载平台上提供的PPT作品，为了您和以及原创作者的利益，请勿复制、传播、销售，否则将承担法律责任！将对作品进行维权，按照传播下载次数进行十倍的索取赔偿！ Do Activities 9 & 10 on Page 73. ① Complete the paragraphs with the correct form of the words and expressions in the box. Suggested answers: 1. is home to 2. are native to 3. scientific 4. Habitats 5. ecosystem 6. appearance 7. primitive 8. ancestor 感谢您下载平台上提供的PPT作品，为了您和以及原创作者的利益，请勿复制、传播、销售，否则将承担法律责任！将对作品进行维权，按照传播下载次数进行十倍的索取赔偿！ Do Activities 9 & 10 on Page 73. ② Work in pairs. Look at the pictures of the species native to different regions of China. Talk about biodiversity in China using the words and expressions in this section. Do online research to find more information. Yak, long-haired, short-legged oxlike mammal that was probably domesticated in Tibet but has been introduced wherever there are people at altitudes of 4,000–6,000 metres (14,000–20,000 feet), mainly in China but also in Central Asia, Mongolia, and Nepal. 水杉（Metasequoia glyptostroboides Hu & W. C. Cheng），杉科 [22]水杉属植物落叶乔木。其植株高大，树皮灰褐色，呈长条形，幼树树冠尖塔形，老树则为广圆头形；叶相对而生，叶色为绿，呈羽状，扁平且有绒毛；雌雄同株，球果 [26]，熟时深褐色；种子扁平，具窄翅；花期4-5月，球果10-11月成熟。 [11]因为水杉是可以在浅水中生长的大型乔木，所以叫做水杉。 1. (2023·新课标Ⅰ卷)When I finally finished the essay，the thought of winning ____________ (give) way to the enjoyment of writing. 2. (2022·全国乙卷)A few weeks before，I ____________ (start) writing my term paper. I thought I could finish it by August. 3. (2022·新高考Ⅰ卷)I quickly searched the crowd for the school's coach and asked him what ________________(happen). 4. I ____________ (hope) to be back last night, but I didn't catch the train. 5. It was the second time that Smith ____________ (visit) the Great Wall. 6. By the end of last year, Henry ____________ (collect) more than a thousand postcards. 7. He ____________ (work) on a ship for 8 years before he ____________ (become) the captain of the ship. 8. When first coming to that city, my parents often had a chat with neighbours, just as they ____________ (do) in our hometown. 9. His brother ____________ (be) the conductor of the orchestra for many years. 10. All morning as she waited for the medical report from the doctor, her nervousness ____________ (grow). 课时作业十九 Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ $$