外研版（2019）选择性必修一Unit 5 Revealing nature Section B Using Language（教案）
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| 名称 | 外研版（2019）选择性必修一Unit 5 Revealing nature Section B Using Language（教案） |  | |
| 格式 | zip | ||
| 文件大小 | 137.0KB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 外研版（2019） | ||
| 科目 | 英语 | ||
| 更新时间 | 2022-08-28 13:32:35 | ||
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Unit 5 Revealing nature
Section B Using Language
教学设计
科目：英语 课题：Section B Using Language 课时：1课时
教学目标与核心素养：
知识目标：引导学生发现并掌握过去完成时的构成和用法，使学生能够再真实语境中灵活运用该时态
能力目标：学生能够熟练运用过去完成时完成练习
情感目标：引导学生了解自然界中生物多样性，尊重生物多样性，提高环保意识
教学重难点
教学重点：引导学生观察例句，发现并总结过去完成时的规则，完成练习
教学难点：提高学生学习语法的兴趣
课前准备：多媒体，黑板，粉笔
教学过程：
一、Pre-class
1. Greeting
2. Leading-in
学生活动：完成活动1。Look at the sentences from the reading passage and answer the questions.
a Darwin suspected that the finches had evolved from a common ancestor, .
b Many people refused to believe that living things, including humans, had evolved from lower forms of life.
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
教师引导学生观察例句并归纳总结过去完成时的特点。教师仅作为辅助者、监督者，为学生提供支持性信息。
第一步：请学生在课文中找到活动1中的两个例句，关注粗体部分，然后回答问题1、2。
第二步：学生分组，从本板块课文中找出所有用过去完成时表述的句子，进一步理解句意，并进行分析讨论。
第三步：引导学生归纳总结过去完成时的核心用法（表达过去的过去），回答问题3。
1 In sentence (a), "evolved from a common ancestor" happened first.
2 In sentence (b), "evolved from lower forms of life" happened first.
3 It indicates the action happened before a certain past action.
While-class
教师活动：教师总结过去完成时的语法
过去完成时
1过去完成时的构成和用法
构成：had+动词的过去分词
用法：
（1）表示在过去某一时间或动作之前已经完成的动作，即“过去的过去”。这一过去时间可用by，before等构成的短语及when, before, after, by the time等引导的状语从句表示，也可以用一个表示过去的动作或上下文来表示。
By the end of last year，we had produced 20,000 cable cars.
到去年年底，我们已经生产了两万辆缆车。
The barber had shaved himself before attending yesterday's wedding.
理发师在参加昨天的婚礼前剃了胡子。
（2）表示从过去某一时间开始一直延续到过去另一时间的动作，这个动作可能还要延续下去，常与for, since构成的表示一段时间的短语或since引导的表示一段时间的从句连用。
The worker said he had worked for the employer since last year.
这个工人说他从去年开始就为雇主工作。
（3）表示过去未曾实现的愿望、打算或意图等。常用had hoped/
planned/meant/intended/thought/wanted/expected等，相当于上述动词过去式接不定式完成式，即"hoped/planned....to have done"。
I had planned to come, but I was prevented by the bad weather.
我本来打算来的，但被坏天气阻止了。
2常用过去完成时的句式
（1）It/This/That was the first/second…time that sb. had done sth.
这/那是某人第一次/第二次……做某事。
It was the third time that he had made the same mistake.
那是他第三次犯同样的错误了。
（2）表示"一......"的hardly/scarcely...when..., no sooner...than..句式中，含hardly/scarcely, no sooner的分句常用过去完成时，且当hardly, scarcely, no sooner置于句首时，句子要用部分倒装。
I had hardly/scarcely answered the teacher when he interrupted me.
=Hardly/Scarcely had I answered the teacher when he interrupted me.
我还没来得及回答老师的问题，他就打断了我的话。
（3）虚拟语气中表示与过去事实相反的假设，if从句和wish/would rather/only if后的从句中用过去完成时。
I wish I had been at your party last Tuesday. 我希望上周二我参加了你的聚会。
3过去完成时与其他时态的区别
（1）过去完成时与一般过去时的区别：
过去完成时表示在过去某一时间或动作之前已经完成的动作，即“过去的过去”；而一般过去时表示过去发生的动作或存在的状态。
Mr. Smith died yesterday. He had been a good friend of mine.
史密斯先生昨天去世了。他以前是我的好友。
在含有after或before引导的时间状语从句的主从复合句中，由于主句和从句的动作先后关系明显，所以可用一般过去时代替过去完成时。
After he (had) left the room, the employer came in.
他离开房间后，老板进来了。
“时间名词+ before”在句子中作状语，句子用过去完成时；“时间名词+ ago”在句中作状语，句子用一般过去时。
（2）过去完成时和现在完成时的区别：现在完成时以“现在”作为时间参照来谈论过去；而过去完成时则以“过去”作为时间参照来谈论更远的过去。
I have lived in Beijing for one year. 我已经在北京住了一年了。（到现在为止）
学生活动：完成活动2。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.
教师带领学生填空，在真实语境中巩固对动词不同时态的理解。
第一步：学生阅读活动指令、句子和语篇，理解活动目的和语篇内容。
第二步：引导学生关注动作发生的先后顺序，运用恰当的时态独立完成活动2的语篇。
第三步：请个别学生说出答案，全班核对答案。
背景信息
Yuan Longping
Yuan Longping was born in Beijing in 1930.
After he graduated from university in the early1950s, he dedicated himself to the research of agriculture. Yuan had the idea to create a new breed of rice in the 1960s. Since then, he has worked tirelessly to research and develop a better rice breed. In 1973 he and his collaborators managed to cultivate a hybrid rice species that was superior to many others. This species produced 20 per cent more rice per plant than the commonly grown varieties. For his achievements and contributions, Yuan is known as the "father of hybrid rice" and was awarded the Medal of the Republic in 2019.
Gregor Mendel
Gregor Mendel (1822–1884) was an influential botanist. Mendel worked out the basic principles of heredity by experimenting with plants. In1866, he published his findings, showing how invisible "factors" (now known as genes) are responsible for predictable visible traits. As a result of his work, he became known as the "father of modern genetics".
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 1______ to do research on hybrid rice because natural disasters 2 _____ food shortages in the 1960s. In the end, he 3 _____ 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 Mendel 4 _____ study pea plants because their characteristics were easy to control. By the time of his death in 1884, he 5 _____ important discoveries about genetics.
参考答案：1 began 2 had led to 3 developed 4 chose to 5 had mad
学生活动：完成活动3。Complete the online encyclopedia entry with the correct form of the words in the box.
decline compete eat live introduce arrive
Lonesome George
Lonesome Georgewas 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 humans 1_____ on the island, the species 2 _____ in isolation and 3 _____ the plants that naturally grew there. George was discovered many years after their arrival, and by then humans 4 _____ new species that _____ 5 for the food the tortoises ate. After goats in particular had been brought to the island, the Pinta Island tortoise population 6 _____. Eventually, only George remained.
1 arrived
2 had lived
3 eaten
4 had introduced
5 competed
6 declined
三、After-class
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.
学生分组，组内进行讨论，简单介绍这种龟灭绝的原因。
学生两人一组，分别扮演记者及Lonesome George的看护者，根据活动4的要求完成角色扮演。教师提示学生正确使用过去完成时.
Summary
老师根据课堂内容，总结课上的语法。
作业布置
完成本节课的同步练习。
Section B Using Language
教学设计
科目：英语 课题：Section B Using Language 课时：1课时
教学目标与核心素养：
知识目标：引导学生发现并掌握过去完成时的构成和用法，使学生能够再真实语境中灵活运用该时态
能力目标：学生能够熟练运用过去完成时完成练习
情感目标：引导学生了解自然界中生物多样性，尊重生物多样性，提高环保意识
教学重难点
教学重点：引导学生观察例句，发现并总结过去完成时的规则，完成练习
教学难点：提高学生学习语法的兴趣
课前准备：多媒体，黑板，粉笔
教学过程：
一、Pre-class
1. Greeting
2. Leading-in
学生活动：完成活动1。Look at the sentences from the reading passage and answer the questions.
a Darwin suspected that the finches had evolved from a common ancestor, .
b Many people refused to believe that living things, including humans, had evolved from lower forms of life.
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
教师引导学生观察例句并归纳总结过去完成时的特点。教师仅作为辅助者、监督者，为学生提供支持性信息。
第一步：请学生在课文中找到活动1中的两个例句，关注粗体部分，然后回答问题1、2。
第二步：学生分组，从本板块课文中找出所有用过去完成时表述的句子，进一步理解句意，并进行分析讨论。
第三步：引导学生归纳总结过去完成时的核心用法（表达过去的过去），回答问题3。
1 In sentence (a), "evolved from a common ancestor" happened first.
2 In sentence (b), "evolved from lower forms of life" happened first.
3 It indicates the action happened before a certain past action.
While-class
教师活动：教师总结过去完成时的语法
过去完成时
1过去完成时的构成和用法
构成：had+动词的过去分词
用法：
（1）表示在过去某一时间或动作之前已经完成的动作，即“过去的过去”。这一过去时间可用by，before等构成的短语及when, before, after, by the time等引导的状语从句表示，也可以用一个表示过去的动作或上下文来表示。
By the end of last year，we had produced 20,000 cable cars.
到去年年底，我们已经生产了两万辆缆车。
The barber had shaved himself before attending yesterday's wedding.
理发师在参加昨天的婚礼前剃了胡子。
（2）表示从过去某一时间开始一直延续到过去另一时间的动作，这个动作可能还要延续下去，常与for, since构成的表示一段时间的短语或since引导的表示一段时间的从句连用。
The worker said he had worked for the employer since last year.
这个工人说他从去年开始就为雇主工作。
（3）表示过去未曾实现的愿望、打算或意图等。常用had hoped/
planned/meant/intended/thought/wanted/expected等，相当于上述动词过去式接不定式完成式，即"hoped/planned....to have done"。
I had planned to come, but I was prevented by the bad weather.
我本来打算来的，但被坏天气阻止了。
2常用过去完成时的句式
（1）It/This/That was the first/second…time that sb. had done sth.
这/那是某人第一次/第二次……做某事。
It was the third time that he had made the same mistake.
那是他第三次犯同样的错误了。
（2）表示"一......"的hardly/scarcely...when..., no sooner...than..句式中，含hardly/scarcely, no sooner的分句常用过去完成时，且当hardly, scarcely, no sooner置于句首时，句子要用部分倒装。
I had hardly/scarcely answered the teacher when he interrupted me.
=Hardly/Scarcely had I answered the teacher when he interrupted me.
我还没来得及回答老师的问题，他就打断了我的话。
（3）虚拟语气中表示与过去事实相反的假设，if从句和wish/would rather/only if后的从句中用过去完成时。
I wish I had been at your party last Tuesday. 我希望上周二我参加了你的聚会。
3过去完成时与其他时态的区别
（1）过去完成时与一般过去时的区别：
过去完成时表示在过去某一时间或动作之前已经完成的动作，即“过去的过去”；而一般过去时表示过去发生的动作或存在的状态。
Mr. Smith died yesterday. He had been a good friend of mine.
史密斯先生昨天去世了。他以前是我的好友。
在含有after或before引导的时间状语从句的主从复合句中，由于主句和从句的动作先后关系明显，所以可用一般过去时代替过去完成时。
After he (had) left the room, the employer came in.
他离开房间后，老板进来了。
“时间名词+ before”在句子中作状语，句子用过去完成时；“时间名词+ ago”在句中作状语，句子用一般过去时。
（2）过去完成时和现在完成时的区别：现在完成时以“现在”作为时间参照来谈论过去；而过去完成时则以“过去”作为时间参照来谈论更远的过去。
I have lived in Beijing for one year. 我已经在北京住了一年了。（到现在为止）
学生活动：完成活动2。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.
教师带领学生填空，在真实语境中巩固对动词不同时态的理解。
第一步：学生阅读活动指令、句子和语篇，理解活动目的和语篇内容。
第二步：引导学生关注动作发生的先后顺序，运用恰当的时态独立完成活动2的语篇。
第三步：请个别学生说出答案，全班核对答案。
背景信息
Yuan Longping
Yuan Longping was born in Beijing in 1930.
After he graduated from university in the early1950s, he dedicated himself to the research of agriculture. Yuan had the idea to create a new breed of rice in the 1960s. Since then, he has worked tirelessly to research and develop a better rice breed. In 1973 he and his collaborators managed to cultivate a hybrid rice species that was superior to many others. This species produced 20 per cent more rice per plant than the commonly grown varieties. For his achievements and contributions, Yuan is known as the "father of hybrid rice" and was awarded the Medal of the Republic in 2019.
Gregor Mendel
Gregor Mendel (1822–1884) was an influential botanist. Mendel worked out the basic principles of heredity by experimenting with plants. In1866, he published his findings, showing how invisible "factors" (now known as genes) are responsible for predictable visible traits. As a result of his work, he became known as the "father of modern genetics".
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 1______ to do research on hybrid rice because natural disasters 2 _____ food shortages in the 1960s. In the end, he 3 _____ 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 Mendel 4 _____ study pea plants because their characteristics were easy to control. By the time of his death in 1884, he 5 _____ important discoveries about genetics.
参考答案：1 began 2 had led to 3 developed 4 chose to 5 had mad
学生活动：完成活动3。Complete the online encyclopedia entry with the correct form of the words in the box.
decline compete eat live introduce arrive
Lonesome George
Lonesome Georgewas 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 humans 1_____ on the island, the species 2 _____ in isolation and 3 _____ the plants that naturally grew there. George was discovered many years after their arrival, and by then humans 4 _____ new species that _____ 5 for the food the tortoises ate. After goats in particular had been brought to the island, the Pinta Island tortoise population 6 _____. Eventually, only George remained.
1 arrived
2 had lived
3 eaten
4 had introduced
5 competed
6 declined
三、After-class
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.
学生分组，组内进行讨论，简单介绍这种龟灭绝的原因。
学生两人一组，分别扮演记者及Lonesome George的看护者，根据活动4的要求完成角色扮演。教师提示学生正确使用过去完成时.
Summary
老师根据课堂内容，总结课上的语法。
作业布置
完成本节课的同步练习。