外研版（2019）选择性必修第一册 Unit5 Revealing nature Using Language 名师教学设计
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| 名称 | 外研版（2019）选择性必修第一册 Unit5 Revealing nature Using Language 名师教学设计 |  | |
| 格式 | docx | ||
| 文件大小 | 1.9MB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 外研版（2019） | ||
| 科目 | 英语 | ||
| 更新时间 | 2023-03-02 20:47:34 | ||
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Unit 5 Using Language 名师教学设计
课时内容
本课时涉及的是语言知识运用，包括 Past perfect和Biodiversity两部分：Past perfect讲解过去完成时的用法，帮助分类总结过去完成时的用法特点以及常见的时间状语。Biodiversity部分通过听力和阅读材料引导学生了解物种的多样性。
课时目标
1.掌握本课时的重点单词 characteristic、decline、blame、primitive和短语 be native to、make important discoveries、in particular、be harmful to、be home to、by contrast、grow up to、carry out、serve as的用法，并能在真实语境中灵活运用。
2.掌握过去完成时的用法。
3.帮助学生了解与物种多样性、自然界相关的话题内容，并能够恰当地运用功能表达询问信息、补充信息。
4.通过学习了解生物的多样性，激发学生探索大自然奥秘的热情，进而更加热爱自然、保护自然。
重点难点：
重点：
过去完成时的用法。
难点：
1.过去完成时的用法。
2.学会该部分重点单词、短语和句型的用法。
教学准备：
教师准备：
1.做好该部分内容的PPT和音频材料。
2.准备好一些关于物种多样性的图片或视频资料，让学生进一步了解自然界中生物的多样性。
学生准备：
1.课前总结和概括自己掌握的过去完成时的用法。
2.上网查找关于物种多样性的资料，获取更多以生物多样性著称的加拉帕戈斯群岛的信息。
3.预习课本内容，找出该部分的新词汇，并根据上下文猜测其含义。
教学过程：
Step Ⅰ Grammar—Past perfect
1. Do Activity 1 on Page 53.
Look at the sentences from the reading passage and answer the questions.
·In sentence (a), which action happened first,“suspected”or“evolved from a common ancestor”
·In sentence(b), which action happened first,“refused to believe”or“evolved from lower forms of life”
·What does the structure had done indicate
Suggested answers： ·In sentence (a),“evolved from a common ancestor”happened first. ·In sentence(b), “evolved from lower forms of life”happened first. ·It indicates the action happened before a certain past action.
2. Give more examples with the past perfect tense. Guide students to summarise its use in their own words. Then ask them to give examples.
3. Do Activity 2 on Page 53.
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 Longping①____________to do research on hybrid rice because natural disasters②____________food shortages in the 1960s. In the end, he③____________ a better type of rice.
(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 Mendel④____________study pea plants because their characteristics were easy to control. By the time of his death in 1884, he⑤____________ important discoveries about genetics.
Suggested answers： ① began ② had led to ③ developed ④ chose to ⑤ had made
4. Do Activities 3&4 on Page 53.
(1) Complete the online encyclopaedia entry with the correct form of the words in the box.
Lonesome George Lonesome George was the last Pinta Island tortoise. He died in 2012. After George’s death, the Pinta Island tortoise was declared extinct. The extinction of the Pinta Island tortoise is blamed on humans. Before
humans①____________on the island. the species②____________in isolation and③____________the plants that naturally grew there. George was discovered many years after their arrival，and by then humans④____________new species that⑤____________for the food the tortoises ate. After goats in particular had been brought to the island，the Pinta Island tortoise population⑥____________.Eventually，only George remained.
Suggested answers： ① arrived ② had lived ③ eaten ④ had introduced ⑤ competed ⑥ declined
（2）Work in pairs.
Act out a role-play using the information in Activity 3.One of you will play the keeper of Lonesome George，and the other will play the reporter asking about George. Use the past perfect tense where appropriate.
【备注】语法知识点讲解详见第二教案“重点语法精讲”。
【设计意图】这几个活动的设置，既紧扣单元话题，又在具体语境中练习了语法知识，锻炼了学生分析问题、解决问题的能力，同时也提升了学生探究问题的能力。
Step Ⅱ Biodiversity
1. Do Activity 5 on Page 54.
Listen to the podcast and choose the statements that are made.
①Biodiversity is important.
②Bacteria are always harmful to humans.
③Some species of bacteria are used in food production.
④Many species of bacteria recycle dead organic matter.
⑤Our immune systems are able to fight off all germs.
Suggested answers： ③④
2. Do Activity 6 on Page 54.
Listen again and complete the fact sheet.
Cells ·Every living thing is①____________.They are like②____________. ·In the human body there are about③____________human cells and around ④____________bacteria cells. Bacteria ·Most bacteria in the human body can⑤____________. ·In the food production process, bacteria can ⑥____________dead organic matter.
Suggested answers： ①made up of cells ②bricks that are used to build houses ③thirty trillion ④thirty-nine trillion ⑤help with digestion ⑥break down
3.Do Activities 7 on Page 54.
Complete the boxes with the expressions from the podcast.
Do you know about... Have you heard of... By the way,... In fact,… Actually,… Speaking of which,…
Checking background knowledge
Adding information
Suggested answers： ·Checking background knowledge Do you know about… Have you heard of... ·Adding information by the way,… Actually,… In fact,… Speaking of which,…
4. Do Activity 8 on Page 54.
Read the passage and answer the questions.
·What species are mentioned and what is special about them
·What other unusual life forms do you know of
Suggested answers： ·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℃. ·（略）
【设计意图】通过活动5和活动6，引导学生进一步了解生物的多样性。通过交际用语的使用，锻炼学生的口语表达能力，提升语言交际能力。
5.Do Activities 9&10 on Page 55.
（1）Complete the paragraphs with the correct form of the words and expressions in the box.
The Galápagos Islands are renowned worldwide for their unique biodiversity. The Giant Tortoise Reserve on Santa Cruz①__________several species of giant tortoise that②__________the Galápagos Islands. The island is also home to the Charles Darwin Research Station, where③__________studies are carried out. 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__________. Iguanas can be found on San Cristóbal. They have a very special⑥______,with comb-like spines on their back. There is evidence that all the different iguanas have developed from more ⑦__________ones and share a common⑧__________.
Suggested answers： ① is home to ② are native to ③ scientific ④ habitats ⑤ ecosystem ⑥ appearance ⑦ primitive ⑧ ancestor
【设计意图】熟读文章，在合适的位置选用词汇的正确形式填空，既巩固学生对词汇的理解与认知，锻炼了学生对篇章的理解能力，又提升了学生的语言运用能力。同时，进一步巩固了所学语法知识。
（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.
Step Ⅲ Exercises
Fill in the blanks with the correct forms of the words in the brackets.
①By nine o’clock last night, we__________(get)200 pictures from the spaceship. ②I__________ (be) at the bus stop for 20 minutes when a bus finally came. ③He said he__________ (work) in that factory since 1949. ④I didn’t know these words, for I __________(not study) my lesson. ⑤We __________(learn) over two thousand English words by the end of last term.
Suggested answers： ① had got ② had been ③ had worked ④ had not studied ⑤ had learnt
【设计意图】通过具体的练习，引导学生学会利用时间轴分析语境，理清动作的先后关系，选用正确的时态。
Step IV Summing up
总结过去完成时的用法，并注意该部分新学词汇的运用。
Step V Homework
1. Give students some examples to fill in the blanks with the past perfect tense.
2. Master the usages of the new vocabulary.
板书设计：
Unit 5 Revealing nature Period II Using language I Grammar—Past perfect 1. Do Activity 1 on Page 53. 2. Give more examples with the past perfect tense and summarise its use. 3. Do Activity 2 on Page 53. 4. Do Activities 3 &4 on Page 53. Ⅱ. Biodiversity 1. Do Activity 5 on Page 54. 2. Do Activity 6 on Page 54. 3. Do activity 7 on Page 54. 4. Do Activity 8 on Page 54. 5. Do Activities 9&10 on Page 55. Ⅲ. Exercises IV. Summing up V. Homework
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课时内容
本课时涉及的是语言知识运用，包括 Past perfect和Biodiversity两部分：Past perfect讲解过去完成时的用法，帮助分类总结过去完成时的用法特点以及常见的时间状语。Biodiversity部分通过听力和阅读材料引导学生了解物种的多样性。
课时目标
1.掌握本课时的重点单词 characteristic、decline、blame、primitive和短语 be native to、make important discoveries、in particular、be harmful to、be home to、by contrast、grow up to、carry out、serve as的用法，并能在真实语境中灵活运用。
2.掌握过去完成时的用法。
3.帮助学生了解与物种多样性、自然界相关的话题内容，并能够恰当地运用功能表达询问信息、补充信息。
4.通过学习了解生物的多样性，激发学生探索大自然奥秘的热情，进而更加热爱自然、保护自然。
重点难点：
重点：
过去完成时的用法。
难点：
1.过去完成时的用法。
2.学会该部分重点单词、短语和句型的用法。
教学准备：
教师准备：
1.做好该部分内容的PPT和音频材料。
2.准备好一些关于物种多样性的图片或视频资料，让学生进一步了解自然界中生物的多样性。
学生准备：
1.课前总结和概括自己掌握的过去完成时的用法。
2.上网查找关于物种多样性的资料，获取更多以生物多样性著称的加拉帕戈斯群岛的信息。
3.预习课本内容，找出该部分的新词汇，并根据上下文猜测其含义。
教学过程：
Step Ⅰ Grammar—Past perfect
1. Do Activity 1 on Page 53.
Look at the sentences from the reading passage and answer the questions.
·In sentence (a), which action happened first,“suspected”or“evolved from a common ancestor”
·In sentence(b), which action happened first,“refused to believe”or“evolved from lower forms of life”
·What does the structure had done indicate
Suggested answers： ·In sentence (a),“evolved from a common ancestor”happened first. ·In sentence(b), “evolved from lower forms of life”happened first. ·It indicates the action happened before a certain past action.
2. Give more examples with the past perfect tense. Guide students to summarise its use in their own words. Then ask them to give examples.
3. Do Activity 2 on Page 53.
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 Longping①____________to do research on hybrid rice because natural disasters②____________food shortages in the 1960s. In the end, he③____________ a better type of rice.
(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 Mendel④____________study pea plants because their characteristics were easy to control. By the time of his death in 1884, he⑤____________ important discoveries about genetics.
Suggested answers： ① began ② had led to ③ developed ④ chose to ⑤ had made
4. Do Activities 3&4 on Page 53.
(1) Complete the online encyclopaedia entry with the correct form of the words in the box.
Lonesome George Lonesome George was the last Pinta Island tortoise. He died in 2012. After George’s death, the Pinta Island tortoise was declared extinct. The extinction of the Pinta Island tortoise is blamed on humans. Before
humans①____________on the island. the species②____________in isolation and③____________the plants that naturally grew there. George was discovered many years after their arrival，and by then humans④____________new species that⑤____________for the food the tortoises ate. After goats in particular had been brought to the island，the Pinta Island tortoise population⑥____________.Eventually，only George remained.
Suggested answers： ① arrived ② had lived ③ eaten ④ had introduced ⑤ competed ⑥ declined
（2）Work in pairs.
Act out a role-play using the information in Activity 3.One of you will play the keeper of Lonesome George，and the other will play the reporter asking about George. Use the past perfect tense where appropriate.
【备注】语法知识点讲解详见第二教案“重点语法精讲”。
【设计意图】这几个活动的设置，既紧扣单元话题，又在具体语境中练习了语法知识，锻炼了学生分析问题、解决问题的能力，同时也提升了学生探究问题的能力。
Step Ⅱ Biodiversity
1. Do Activity 5 on Page 54.
Listen to the podcast and choose the statements that are made.
①Biodiversity is important.
②Bacteria are always harmful to humans.
③Some species of bacteria are used in food production.
④Many species of bacteria recycle dead organic matter.
⑤Our immune systems are able to fight off all germs.
Suggested answers： ③④
2. Do Activity 6 on Page 54.
Listen again and complete the fact sheet.
Cells ·Every living thing is①____________.They are like②____________. ·In the human body there are about③____________human cells and around ④____________bacteria cells. Bacteria ·Most bacteria in the human body can⑤____________. ·In the food production process, bacteria can ⑥____________dead organic matter.
Suggested answers： ①made up of cells ②bricks that are used to build houses ③thirty trillion ④thirty-nine trillion ⑤help with digestion ⑥break down
3.Do Activities 7 on Page 54.
Complete the boxes with the expressions from the podcast.
Do you know about... Have you heard of... By the way,... In fact,… Actually,… Speaking of which,…
Checking background knowledge
Adding information
Suggested answers： ·Checking background knowledge Do you know about… Have you heard of... ·Adding information by the way,… Actually,… In fact,… Speaking of which,…
4. Do Activity 8 on Page 54.
Read the passage and answer the questions.
·What species are mentioned and what is special about them
·What other unusual life forms do you know of
Suggested answers： ·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℃. ·（略）
【设计意图】通过活动5和活动6，引导学生进一步了解生物的多样性。通过交际用语的使用，锻炼学生的口语表达能力，提升语言交际能力。
5.Do Activities 9&10 on Page 55.
（1）Complete the paragraphs with the correct form of the words and expressions in the box.
The Galápagos Islands are renowned worldwide for their unique biodiversity. The Giant Tortoise Reserve on Santa Cruz①__________several species of giant tortoise that②__________the Galápagos Islands. The island is also home to the Charles Darwin Research Station, where③__________studies are carried out. 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__________. Iguanas can be found on San Cristóbal. They have a very special⑥______,with comb-like spines on their back. There is evidence that all the different iguanas have developed from more ⑦__________ones and share a common⑧__________.
Suggested answers： ① is home to ② are native to ③ scientific ④ habitats ⑤ ecosystem ⑥ appearance ⑦ primitive ⑧ ancestor
【设计意图】熟读文章，在合适的位置选用词汇的正确形式填空，既巩固学生对词汇的理解与认知，锻炼了学生对篇章的理解能力，又提升了学生的语言运用能力。同时，进一步巩固了所学语法知识。
（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.
Step Ⅲ Exercises
Fill in the blanks with the correct forms of the words in the brackets.
①By nine o’clock last night, we__________(get)200 pictures from the spaceship. ②I__________ (be) at the bus stop for 20 minutes when a bus finally came. ③He said he__________ (work) in that factory since 1949. ④I didn’t know these words, for I __________(not study) my lesson. ⑤We __________(learn) over two thousand English words by the end of last term.
Suggested answers： ① had got ② had been ③ had worked ④ had not studied ⑤ had learnt
【设计意图】通过具体的练习，引导学生学会利用时间轴分析语境，理清动作的先后关系，选用正确的时态。
Step IV Summing up
总结过去完成时的用法，并注意该部分新学词汇的运用。
Step V Homework
1. Give students some examples to fill in the blanks with the past perfect tense.
2. Master the usages of the new vocabulary.
板书设计：
Unit 5 Revealing nature Period II Using language I Grammar—Past perfect 1. Do Activity 1 on Page 53. 2. Give more examples with the past perfect tense and summarise its use. 3. Do Activity 2 on Page 53. 4. Do Activities 3 &4 on Page 53. Ⅱ. Biodiversity 1. Do Activity 5 on Page 54. 2. Do Activity 6 on Page 54. 3. Do activity 7 on Page 54. 4. Do Activity 8 on Page 54. 5. Do Activities 9&10 on Page 55. Ⅲ. Exercises IV. Summing up V. Homework
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