人教版（2019）选择性必修第三册Unit 2 Healthy Lifestyle Discover Useful Structures 课件-(共29张PPT)
文档属性
| 名称 | 人教版（2019）选择性必修第三册Unit 2 Healthy Lifestyle Discover Useful Structures 课件-(共29张PPT) |  | |
| 格式 | pptx | ||
| 文件大小 | 8.7MB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 人教版（2019） | ||
| 科目 | 英语 | ||
| 更新时间 | 2024-04-12 18:09:50 | ||
图片预览
文档简介
(共29张PPT)
Discover Useful Structures
Unit 2 Healthy Lifestyle
新人教选择性必修三
Learning Aims
After this period ,students will be able to:
1. To master the use of the infinitive as subject;
2. To understand the differences of the Infinitive and the
gerund as subject;
3. To use the Infinitive as subject in different situations.
Free talk:A day of our school life
Lead in
A day of our school life
In the morning ,it is difficult for us to get up early as many of us like to chat late into night. Our habit is to talk about things that happened around us. But our teachers don’t allow us to do so. To improve our study , we read aloud on the playground every morning. As is known to us all ,reading aloud is very important . Our teachers think it impossible to learn well without much memory work. However, to form a good habit is never easy . The best way to form a good habit is to repeat your action for a long period of time.
We are very happy to dance every .To do morning exercise is good for our health.
During classes ,we need to focus our attention on what our teachers say, or we may find it difficult to catch up with others . In the caferteria, the most relaxing thing to do is to choose what we really love ----instant noodle. We know that it is unhealthy to eat it ,but it really make us satisfied and relaxed.
After a day of hard work ,we go back home or dormintory to have a sound sleep.
A day of our school life
In the morning ,it is difficult for us to get up early as many of us like to chat late into night. Our habit is to talk about things that happened around us. But our teachers don’t allow us to do so .To improve our study , we read aloud on the playground every morning. As is known to us all ,reading aloud is very important . Our teachers think it impossible to learn well without much memory work. However, to form a good habit is never easy . The best way to form a good habit is to repeat your action for a long period of time.
We are very happy to dance every Monday .To do morning exercise is good for our health.
During classes ,we need to focus our attention on what our teachers say, or we may find it difficult to catch up with others . In the caferteria, the most relaxing thing to do is to choose what we really love ----instant noodle. We know that it is unhealthy to eat it ,but it really make us satisfied and relaxed.
After a day of hard work ,we go back home or dormintory to have a sound sleep.
Thinking\discussing\presenting\explaining
1.…it is difficult for us to get up early as many of us like to chat late into night.
2.Our habit is to talk about things that happened around us
3.But our teachers don’t allow us to do so
4.To improve our study , we read aloud on the playground every morning.
5.Our teachers think it impossible to learn well without much memory work
6.However, to form a good habit is never easy
主语（真正主语）
宾语
表语
宾语补足语
状语（表目的）
宾语（真正宾语）
主语
7.The best way to form a good habit is to repeat your action for a long period of time.
8.We are very happy to dance every Monday
9.To do morning exercise is good for our health.
10.we need to focus our attention on what our teachers say
11.we may find it difficult to catch up with others
12.…the most relaxing thing to do is (to) choose what we really love ----instant noodle
13.We do know that it is unhealthy to eat it
14.we go back home or dormintory to have a sound sleep
定语
表语
状语（表原因）
主语
宾语
宾语（真正宾语）
表语
主语（真正主语）
状语（表目的）
动词不定式（The Infinitive）
动词不定式的句法作用法
动词不定式有名词、形容词和副词的特征，因此在句中可作____、____、___、____、____、____
成分 主语 宾语 表语 定语 状语 补足语
不定式 √ √ √ √ √ √
主语
宾语
表语
定语
状语
补足语
主谓宾 定状补
主干枝叶分清楚
主语常在句子首
谓语地位常居中
宾语紧随谓语后
有些情况也不用。
定语修饰主和宾
状语围着谓语亲
感官使役带宾补
With 结构记牢固
6.However, to form a good habit is never easy
9.To do morning exercise is good for our health.
不定式作主语结构：不定式置于句首位置
Observe and Discover
主语
主语
不定式作主语通常位于句首，表示具体的、某一次的或将来的动作，谓语动词用单数。
To see is to believe.
To get up early is difficult for young men.
To finish the homework in an hour is impossible.
practice
Analyze what does the underlined part serve as in each sentence and translate them into Chinese.
To prevent harmful habits like these from dominating a teenager’s life is essential.
To change bad habit is never easy,even with many attempts.
改变不良习惯从来都不是一件容易的事情，即使你三番五次地尝试。
防止此类有害习惯主宰青少年的生活是至关重要的。
系动词
表语
主语
主语
系动词
表语
to do 不定式放在句首作主语
Observe and Discover
How to use the computer is a question.
Where to put the bikes is being discussed.
When and where to have the meeting has not been decided.
_____________构成不定式短语作主语。疑问词包括疑问代词who、whom、what、which、whose以及疑问副词when、where和how。此外连接词whether也适用。
疑问词+to do
How to use the computer is a question.
When to go there has not been decided yet.
Try to find the subject of each sentence, and translate them into Chinese.
主语
主语
如何使用电脑是一个问题。
还没决定什么时候去那里。
疑问词+不定式作主语
practice
1. _______________ the river is still a problem.
怎样过桥仍然是个问题。（作主语）
2. ______________________has not been decided
还没有决定去哪儿露营。（作主语）
3. We have now idea __________________________________.
我们不知道如何控制水污染。（作宾语）
4.The question is ________________________.
问题是在那里举行这个晚会。（作表语）
How to cross
Where to go camping
how to control the water pollution
where to hold the party
practice
To work out the problem is not easy.
=It’s not easy to work out the problem.
To play with snow in winter is interesting .
=It is interesting to play with snow in winter.
To finish the building in a month is difficult.
=It is difficult to finish the building in a month.
当主语较长谓语较短时，常用it作形式主语放在句首，而将真正的主语—不定式放到谓语的后面。
Observe and Discover
Analyze what does the underlined part serve as in each sentence and translate them into Chinese.
1.What is art It is hard to give a precise definition
2.As there have been so many different styles of western art, it is impossible to describe them all in a short text.
3.However ,during this period ,it can be easy for some of them to form bad habits.
4.After all ,it is not easy to break bad habits
it作形式主语
真正的主语
it作形式主语
it作形式主语
it作形式主语
真正的主语
真正的主语
真正的主语
practice
考点：it 作形式主语常见的句型
1. It is+形容词+for/of sb +to do sth
E.g.
It is easy for me to learn how to drive.
It is clever of you to apply for the position.
一般规律：动词不定式的逻辑主语常用_____________来表示
若形容词 ”描述人的品性、特征”, 用of;
若形容词“描述事或物的特征”, 用for;
for/of sb
It is stupid _______them to quarrel about this question.
It is easy _______ me to learn how to drive.
It is impolite ______ him to say so.
It is important _______ us to express our opinions.
It is clever ______ him to leave that company.
6. It was foolish her to make such a mistake.
7. It is rude him to say that to a lady.
8. It is difficult teenagers to live alone in a foreign country.
practice
Observe and Discover
1. It’s our duty to do that.
2. It’s a mistake not to help them.
3. It must be great fun to fly to the moon in a spaceship.
以上三个句子的表语都是_______，它们可归纳为一个共同句式：_____________________________。
名词
it + be + n + to do sth
Observe and Discover
1. It took me more than an hour to do my homework
yesterday evening.
2. It will take us a long time to walk there.
3. How long does it take to get there
4. How much did it cost you to send the package
以上四个句子是动词不定式作真正主语，由 it 作形式主语引导的句子，它们的谓语是 _____________。
它们的共同句式是____________________________________
_____________，表示某人花多少时间或金钱做某事。
take / cost
it takes (costs) sb some time / money
to do sth
1. To see is to believe.
2. To do this is to cut the foot to fit the shoe.
3. To say is one thing and to do is another.
4. To make a detailed plan is a good idea to make it successful.
当句子主语和表语都是非谓语时，通常要_________，例如：
To see is to believe. = Seeing is believing.
保持一致
1.不定式作主语时注意的几个问题
To look after children is her job today.
她今天的工作是看孩子。
Looking after children is her work.
她的工作是照顾孩子。
不定式作主语和动词-ing形式作主语和动词的区别：
1.不定式作主语时注意的几个问题
Conclusion
动名词作主语表示_______________的行为;不定式作主语表示_____________________________动作。
经常性或习惯性
具体的、一次性的或将来的
1. ______ (do) morning exercises regularly is good for your health.
2. It feels really good ______ (do) morning exercises today.
3.__________ (finish) the task in time is a great challenge.
4.___________(walk) after dinner is good to health.
5._________ (get) to the park by bike will take about 20 minutes.
Doing
to do
practice
To finish
Walking
To get
It is comfortable to have a walk after school in the wood
Checking
comfortable
have a walk
To do morning exercise on the playground is a good habit
do morning exercise
a good habit
It is our duty to keep our campus clean all the time
duty
keep sth.clean
It is impossible for them to remove the huge stone without tools
impossible
remove
It is foolish of you to play cellphone during class.
foolish
play cellphone
Discover Useful Structures
Unit 2 Healthy Lifestyle
新人教选择性必修三
Learning Aims
After this period ,students will be able to:
1. To master the use of the infinitive as subject;
2. To understand the differences of the Infinitive and the
gerund as subject;
3. To use the Infinitive as subject in different situations.
Free talk:A day of our school life
Lead in
A day of our school life
In the morning ,it is difficult for us to get up early as many of us like to chat late into night. Our habit is to talk about things that happened around us. But our teachers don’t allow us to do so. To improve our study , we read aloud on the playground every morning. As is known to us all ,reading aloud is very important . Our teachers think it impossible to learn well without much memory work. However, to form a good habit is never easy . The best way to form a good habit is to repeat your action for a long period of time.
We are very happy to dance every .To do morning exercise is good for our health.
During classes ,we need to focus our attention on what our teachers say, or we may find it difficult to catch up with others . In the caferteria, the most relaxing thing to do is to choose what we really love ----instant noodle. We know that it is unhealthy to eat it ,but it really make us satisfied and relaxed.
After a day of hard work ,we go back home or dormintory to have a sound sleep.
A day of our school life
In the morning ,it is difficult for us to get up early as many of us like to chat late into night. Our habit is to talk about things that happened around us. But our teachers don’t allow us to do so .To improve our study , we read aloud on the playground every morning. As is known to us all ,reading aloud is very important . Our teachers think it impossible to learn well without much memory work. However, to form a good habit is never easy . The best way to form a good habit is to repeat your action for a long period of time.
We are very happy to dance every Monday .To do morning exercise is good for our health.
During classes ,we need to focus our attention on what our teachers say, or we may find it difficult to catch up with others . In the caferteria, the most relaxing thing to do is to choose what we really love ----instant noodle. We know that it is unhealthy to eat it ,but it really make us satisfied and relaxed.
After a day of hard work ,we go back home or dormintory to have a sound sleep.
Thinking\discussing\presenting\explaining
1.…it is difficult for us to get up early as many of us like to chat late into night.
2.Our habit is to talk about things that happened around us
3.But our teachers don’t allow us to do so
4.To improve our study , we read aloud on the playground every morning.
5.Our teachers think it impossible to learn well without much memory work
6.However, to form a good habit is never easy
主语（真正主语）
宾语
表语
宾语补足语
状语（表目的）
宾语（真正宾语）
主语
7.The best way to form a good habit is to repeat your action for a long period of time.
8.We are very happy to dance every Monday
9.To do morning exercise is good for our health.
10.we need to focus our attention on what our teachers say
11.we may find it difficult to catch up with others
12.…the most relaxing thing to do is (to) choose what we really love ----instant noodle
13.We do know that it is unhealthy to eat it
14.we go back home or dormintory to have a sound sleep
定语
表语
状语（表原因）
主语
宾语
宾语（真正宾语）
表语
主语（真正主语）
状语（表目的）
动词不定式（The Infinitive）
动词不定式的句法作用法
动词不定式有名词、形容词和副词的特征，因此在句中可作____、____、___、____、____、____
成分 主语 宾语 表语 定语 状语 补足语
不定式 √ √ √ √ √ √
主语
宾语
表语
定语
状语
补足语
主谓宾 定状补
主干枝叶分清楚
主语常在句子首
谓语地位常居中
宾语紧随谓语后
有些情况也不用。
定语修饰主和宾
状语围着谓语亲
感官使役带宾补
With 结构记牢固
6.However, to form a good habit is never easy
9.To do morning exercise is good for our health.
不定式作主语结构：不定式置于句首位置
Observe and Discover
主语
主语
不定式作主语通常位于句首，表示具体的、某一次的或将来的动作，谓语动词用单数。
To see is to believe.
To get up early is difficult for young men.
To finish the homework in an hour is impossible.
practice
Analyze what does the underlined part serve as in each sentence and translate them into Chinese.
To prevent harmful habits like these from dominating a teenager’s life is essential.
To change bad habit is never easy,even with many attempts.
改变不良习惯从来都不是一件容易的事情，即使你三番五次地尝试。
防止此类有害习惯主宰青少年的生活是至关重要的。
系动词
表语
主语
主语
系动词
表语
to do 不定式放在句首作主语
Observe and Discover
How to use the computer is a question.
Where to put the bikes is being discussed.
When and where to have the meeting has not been decided.
_____________构成不定式短语作主语。疑问词包括疑问代词who、whom、what、which、whose以及疑问副词when、where和how。此外连接词whether也适用。
疑问词+to do
How to use the computer is a question.
When to go there has not been decided yet.
Try to find the subject of each sentence, and translate them into Chinese.
主语
主语
如何使用电脑是一个问题。
还没决定什么时候去那里。
疑问词+不定式作主语
practice
1. _______________ the river is still a problem.
怎样过桥仍然是个问题。（作主语）
2. ______________________has not been decided
还没有决定去哪儿露营。（作主语）
3. We have now idea __________________________________.
我们不知道如何控制水污染。（作宾语）
4.The question is ________________________.
问题是在那里举行这个晚会。（作表语）
How to cross
Where to go camping
how to control the water pollution
where to hold the party
practice
To work out the problem is not easy.
=It’s not easy to work out the problem.
To play with snow in winter is interesting .
=It is interesting to play with snow in winter.
To finish the building in a month is difficult.
=It is difficult to finish the building in a month.
当主语较长谓语较短时，常用it作形式主语放在句首，而将真正的主语—不定式放到谓语的后面。
Observe and Discover
Analyze what does the underlined part serve as in each sentence and translate them into Chinese.
1.What is art It is hard to give a precise definition
2.As there have been so many different styles of western art, it is impossible to describe them all in a short text.
3.However ,during this period ,it can be easy for some of them to form bad habits.
4.After all ,it is not easy to break bad habits
it作形式主语
真正的主语
it作形式主语
it作形式主语
it作形式主语
真正的主语
真正的主语
真正的主语
practice
考点：it 作形式主语常见的句型
1. It is+形容词+for/of sb +to do sth
E.g.
It is easy for me to learn how to drive.
It is clever of you to apply for the position.
一般规律：动词不定式的逻辑主语常用_____________来表示
若形容词 ”描述人的品性、特征”, 用of;
若形容词“描述事或物的特征”, 用for;
for/of sb
It is stupid _______them to quarrel about this question.
It is easy _______ me to learn how to drive.
It is impolite ______ him to say so.
It is important _______ us to express our opinions.
It is clever ______ him to leave that company.
6. It was foolish her to make such a mistake.
7. It is rude him to say that to a lady.
8. It is difficult teenagers to live alone in a foreign country.
practice
Observe and Discover
1. It’s our duty to do that.
2. It’s a mistake not to help them.
3. It must be great fun to fly to the moon in a spaceship.
以上三个句子的表语都是_______，它们可归纳为一个共同句式：_____________________________。
名词
it + be + n + to do sth
Observe and Discover
1. It took me more than an hour to do my homework
yesterday evening.
2. It will take us a long time to walk there.
3. How long does it take to get there
4. How much did it cost you to send the package
以上四个句子是动词不定式作真正主语，由 it 作形式主语引导的句子，它们的谓语是 _____________。
它们的共同句式是____________________________________
_____________，表示某人花多少时间或金钱做某事。
take / cost
it takes (costs) sb some time / money
to do sth
1. To see is to believe.
2. To do this is to cut the foot to fit the shoe.
3. To say is one thing and to do is another.
4. To make a detailed plan is a good idea to make it successful.
当句子主语和表语都是非谓语时，通常要_________，例如：
To see is to believe. = Seeing is believing.
保持一致
1.不定式作主语时注意的几个问题
To look after children is her job today.
她今天的工作是看孩子。
Looking after children is her work.
她的工作是照顾孩子。
不定式作主语和动词-ing形式作主语和动词的区别：
1.不定式作主语时注意的几个问题
Conclusion
动名词作主语表示_______________的行为;不定式作主语表示_____________________________动作。
经常性或习惯性
具体的、一次性的或将来的
1. ______ (do) morning exercises regularly is good for your health.
2. It feels really good ______ (do) morning exercises today.
3.__________ (finish) the task in time is a great challenge.
4.___________(walk) after dinner is good to health.
5._________ (get) to the park by bike will take about 20 minutes.
Doing
to do
practice
To finish
Walking
To get
It is comfortable to have a walk after school in the wood
Checking
comfortable
have a walk
To do morning exercise on the playground is a good habit
do morning exercise
a good habit
It is our duty to keep our campus clean all the time
duty
keep sth.clean
It is impossible for them to remove the huge stone without tools
impossible
remove
It is foolish of you to play cellphone during class.
foolish
play cellphone