外研版（2019）选择性必修第一册Unit 5 Revealing nature Using language 课件(共15张PPT)
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| 名称 | 外研版（2019）选择性必修第一册Unit 5 Revealing nature Using language 课件(共15张PPT) |  | |
| 格式 | pptx | ||
| 文件大小 | 2.6MB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 外研版（2019） | ||
| 科目 | 英语 | ||
| 更新时间 | 2023-10-29 11:24:19 | ||
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(共15张PPT)
Unit 5
Using language
When I got to school, I realized that I had left my schoolbag at home.
Before I got to the bus station, the bus had left.
By the time I got back to school, the bell had rung.
Observe and say
a.Before I got to the bus station,the bus had left.
b.By the time I got back to school, the bell had rung
got to the bus station
the bus had left
got back to school
the bell had rung
Now let’s try to summarise its use in your own words.
Past perfect:
had done
肯定式为__________________；
否定式为__________________；
被动式为__________________。
had done
had not done
had been done
过去完成时 Past perfect
基本结构
①I had finished my homework before I had supper.
②John and Jane had not known each other for a long time before they got married.
③The work had been finished by us last Friday.
基本用法
1. 表示在过去的某一时间或某一动作之前完成的动作或存在的状态。(过去的过去, 即站在“过去”的角度回顾一个更远的过去。)
Now
Past
Past perfect
过去完成时 had done
一般过去时 V-ed
got to/arrived at
had gone/left
在我们到达车站之前，火车就已经走了。
Before we got to the train station, the train had already left.
基本用法
2. 表示从过去某一时间开始，一直延续到过去的另一个时间的动作，常用的时间状语有be then, by the end of, by the time.
到上学期期末为止，我们已经学了2000个英语单词了。
By the end of last term, we ________________________________.
到那时为止，他们已经在那里住了10年了
They _____________ there for ten years by then.
had learned 2000 English words.
had lived
基本用法
3. 表示本打算实现而未实现的愿望和计划, 常用动词有: hope, want, expect, think, mean, suppose, intend, plan
I hope you will pass the exam.
I hope you had pass the exam.
我希望你（下次）能通过考试。
我真希望你通过了（上次）的考试。
VS
实际
没通过
可能会通过
固定句型
1) It/That was+ the first/ second…+ time+ that从句，从句谓语常用过去完成时。
It was the first time that I had visited the Great Wall.
这是我第一次参观长城。
2) It was+一段时间+since从句，从句谓语用过去完成时。
It was three years since he had joined the army.
他参军三年了。
hardly…when…和no sooner…than… “(A) 刚一... , (B) 就...”
主句要部分倒装，并使用过去完成时，从句用一般过去时
1. Hardly had I left when it began to rain.
我刚离开就开始下雨了。
2. No sooner had he sat down than the phone rang.
他刚坐下，电话铃就响了。
特殊句型
1.He ___________(learn) 3000 words before he went to England.
2.The old man told us that he____________ (travel) to many places.
3.It was the third time that he ___________ (see) such a large animal.
4. By the time he got to the airport,the plane ____________(take off)
5.Mary did her homework and_______ (wash) the dishes.
had learned
had travelled
had seen
had taken off
washed
Exercise
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
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 tirme of his death in 1894, he ___________________discoveries about genetics.
chose to
had made important
compete decline eat live introduce arrive
Lonesome George was the last Pinta Island torroise. He died in 2012. After George's death, the Pinta Island tortoise was declared exinct.
The extinction of the Pinta Island tortoise is blamed on humans. Before humans __________on the island, the species ___________in islation and ___________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 popuation____________. Eventually only Geoge remained.
arrived
had lived
had eaten
introduced
competed
declined
Unit 5
Using language
When I got to school, I realized that I had left my schoolbag at home.
Before I got to the bus station, the bus had left.
By the time I got back to school, the bell had rung.
Observe and say
a.Before I got to the bus station,the bus had left.
b.By the time I got back to school, the bell had rung
got to the bus station
the bus had left
got back to school
the bell had rung
Now let’s try to summarise its use in your own words.
Past perfect:
had done
肯定式为__________________；
否定式为__________________；
被动式为__________________。
had done
had not done
had been done
过去完成时 Past perfect
基本结构
①I had finished my homework before I had supper.
②John and Jane had not known each other for a long time before they got married.
③The work had been finished by us last Friday.
基本用法
1. 表示在过去的某一时间或某一动作之前完成的动作或存在的状态。(过去的过去, 即站在“过去”的角度回顾一个更远的过去。)
Now
Past
Past perfect
过去完成时 had done
一般过去时 V-ed
got to/arrived at
had gone/left
在我们到达车站之前，火车就已经走了。
Before we got to the train station, the train had already left.
基本用法
2. 表示从过去某一时间开始，一直延续到过去的另一个时间的动作，常用的时间状语有be then, by the end of, by the time.
到上学期期末为止，我们已经学了2000个英语单词了。
By the end of last term, we ________________________________.
到那时为止，他们已经在那里住了10年了
They _____________ there for ten years by then.
had learned 2000 English words.
had lived
基本用法
3. 表示本打算实现而未实现的愿望和计划, 常用动词有: hope, want, expect, think, mean, suppose, intend, plan
I hope you will pass the exam.
I hope you had pass the exam.
我希望你（下次）能通过考试。
我真希望你通过了（上次）的考试。
VS
实际
没通过
可能会通过
固定句型
1) It/That was+ the first/ second…+ time+ that从句，从句谓语常用过去完成时。
It was the first time that I had visited the Great Wall.
这是我第一次参观长城。
2) It was+一段时间+since从句，从句谓语用过去完成时。
It was three years since he had joined the army.
他参军三年了。
hardly…when…和no sooner…than… “(A) 刚一... , (B) 就...”
主句要部分倒装，并使用过去完成时，从句用一般过去时
1. Hardly had I left when it began to rain.
我刚离开就开始下雨了。
2. No sooner had he sat down than the phone rang.
他刚坐下，电话铃就响了。
特殊句型
1.He ___________(learn) 3000 words before he went to England.
2.The old man told us that he____________ (travel) to many places.
3.It was the third time that he ___________ (see) such a large animal.
4. By the time he got to the airport,the plane ____________(take off)
5.Mary did her homework and_______ (wash) the dishes.
had learned
had travelled
had seen
had taken off
washed
Exercise
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
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 tirme of his death in 1894, he ___________________discoveries about genetics.
chose to
had made important
compete decline eat live introduce arrive
Lonesome George was the last Pinta Island torroise. He died in 2012. After George's death, the Pinta Island tortoise was declared exinct.
The extinction of the Pinta Island tortoise is blamed on humans. Before humans __________on the island, the species ___________in islation and ___________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 popuation____________. Eventually only Geoge remained.
arrived
had lived
had eaten
introduced
competed
declined