人教版（2019）选择性必修 第三册Unit 2 Healthy Lifestyle Discover Useful Structures课件(共24张PPT)
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| 名称 | 人教版（2019）选择性必修 第三册Unit 2 Healthy Lifestyle Discover Useful Structures课件(共24张PPT) |  | |
| 格式 | pptx | ||
| 文件大小 | 9.0MB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 人教版（2019） | ||
| 科目 | 英语 | ||
| 更新时间 | 2024-03-03 16:45:04 | ||
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(共24张PPT)
Infinitives as Subject
Discover Useful Structures
Unit 2 HEALTHY
LIFESTYLE
Learning Objectives
1. master the usage of the infinitive as the subject.
2. use the relevant grammar flexibly and authentically in real situations.
3. understand the difference between the infinitive as the subject and the v. -ing form as the subject.
Revision
不定式的形式
1.基本形式： to+动词原形
2.其否定形式是: not to do.
主动语态 被动语态
一般式
进行式
完成式
完成进行式
to do
to be done
to be doing
to have done
to have been done
to have been doing
Leading in
Watch and think
Watch a short vidoe, and pay attention to what they say.
Warming up
It’s difficult for me to get up early.
To get up early is difficult for me.
主语
Infinitive as Subject
Read and Observe
Pay attention to the italicized infinitives and discuss the meanings and functions of the italicised infinitives.
1. To change bad habits is never easy.
2. It took the surgeon three hours to finish my mother’s lung surgery.
3.To join the People’s Liberation Army, it is required for men to shave off their beards.
4. It was not polite to disturb your neighbors with loud music last night.
主语
主语
主语
主语
动词不定式（短语）作主语
直接放在________作主语；
为了保持句子平衡，用________作形式主语，放在句首，把真正的主语 — 动词不定式置于句后；
和_________构成“疑问词+to do”短语作主语。
句首
it
疑问词
Could you find more infinitives in the reading passage
1. However, during this period, it can be easy for some of them to form bad habits.
2. To prevent harmful habits like these from dominating a teenager’s life is essential.
3. To change bad habits is never easy, even with many attempts.
4. After all, it is not easy to break bad habits.
Presentation
Observe
To see is to believe.
To get good grades requires a lot of hard work.
To learn a skill is very important for everyone in society
Discover
1.不定式作主语通常位于______，表示具体的某次动作，谓语动词用______。
句首
单数
Presentation
Observe
It is interesting to play with snow in winter.
It’s important for us to keep the water clean.
It’s very kind of you to help me.
Discover
以上句子的表语都是______。
形容词
it + be + adj + (逻辑主语) + to do sth
Presentation
2. 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。
It is not right for people with the virus to go to public places.
It was not polite to disturb your neighbours with loud music last night.
To join the People’s LiberationArmy , it is a rule for men to shave off their beards.
It took the surgeon three hours to finish my mother’s lung surgery.
Presentation
It is necessary for you to change your job.
It’s difficult for us to learn English well.
It was silly of you to give up such a good chance!
It’s very kind of you to say so.
若adj. “描述人的品格、特点”, 用of,如 kind, nice, wise, silly, polite, impolite, friendly, foolish, clever;
若adj.“描述事或行为的特征”, 用for,如easy, hard, difficult, possible, important, impossible, necessary,good,
bad, exciting, interesting, surprising
常用句型1：It is+adj.+for/of sb +to do sth
Presentation
常见的名词有：pity, shame, pleasure, one’s duty, one’s job, fun, joy, good manners, bad manners等
Summary
常用句型2：It is + n. + (for sb.) to do sth.
It is an honour to give a speech in behalf of my school.
It is a pity to miss the chance to see your show.
It is our duty to do that.
Presentation
It took me more than an hour to do my homework yesterday evening.
It will take us a lot of money to buy that house.
Summary
常用句型3：
It takes/took/will take sb. some time/money to do sth.
做某事花费某人多长时间(钱)
Presentation
3.动词不定式与疑问词who, whom, whose, what, which, when, where, how连用构成不定式短语做主语。
How to use the computer is the question.
如何使用计算机是个问题。
Where to go has not been decided.
去哪儿还没有定下来。
Presentation
4. 补充：不定式短语作独立成分
通常位于句首，有时位于句中或句末，要用逗号同其他句子成分隔开 To tell the truth，I don’t like the gifted actress in the movie.
常用短语
to sum up 总而言之 to be brief 简言之
to tell the truth 说实话 to be exact 确切地说
to conclude 总而言之，最后 to be frank 坦白地说
to begin/start with 首先 to be honest 说老实话
Presentation
（1） （总而言之），most of the committee members supported the idea but a few were against it.
（2） （简言之），he was happy with the result.
（3）She wrote， （确切地说），ten novels in her lifetime.
（4） （首先），he’s too young for that kind of job.
（5） （说老实话），I don’t really want to go to the party tonight.
To sum up/To conclude
To be brief
to be exact
To begin/start with
To be honest
Presentation
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。
Compare the two sentences below and tell the difference in meaning.
Summary不定式作主语和动词-ing形式作主语的区别：
5. 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.
Doing
to do
Practice
Join the words to make full sentences.
1. important / avoid / passive cigarette smoking
It is important to avoid passive cigarette smoking.
2. will take / nutrition specialist / a balanced diet menu / make / an hour / for you
____________________________________________________________
3. useful / turn to / fitness consultant / for advice
____________________________________________________________
4. illegal / dangerous / take / drugs
____________________________________________________________
5. harmful / skip breakfast / often
____________________________________________________________
It will take nutrition specialist an hour to make a balanced diet menu for you.
It is useful to turn to fitness consultant for advice.
It is illegal and dangerous to take drugs.
It is harmful to skip breakfast often.
Complete the conversations with the correct forms of the phrases in the box.
A: Hello, doctor. I want to lose weight, but I just can’ t seem to do it.
What can you do to help me
B: Well, first, it’s necessary to _____________ what you eat. Cut out all
fatty food and sugary drinks, and eat more fruit and vegetables.
A: I really need to ________ a way to exercise more. I could use a
fitness app, but my phone’s full.
B. So delete a few files. I'm sure the app doesn't take up much space.
decide on
begin with be in control of make a choice decide on make up one’s mind
be in control of
Practice
Practice
A: Before exercising, always do a few warm-ups to ___________
B: I know. But then I always feel too tired to continue!
A: Should I go for the pizza or the fried chicken I hate _____________
like these. You know what—I'm going to eat both!
B: Wow! Don’t eat too much junk food—you’ll get fat. I’ve actually
________________ to go on a diet, so I’ll just stick to the fruit salad.
making a choice
made up my mind
begin with
begin with be in control of make a choice decide on make up one’s mind
to do
to do 作主语位于句首，在谓语之前
to do 作主语位于谓语之后，It作形式主语
疑问词+to do 构成不定式短语，作主语
和-ing 作主语的区别
To read without reflecting is like eating without digesting.
It takes sb. time/money to do sth.
It is + adj. + （for/of sb.） to do sth.
It is + n. + (for sb.) to do sth.
to do 表示具体的，将来的动作
-ing 表示一般的，已经完成的动作
与疑问词who, whom, whose, what, which, when, where, how等连用
Summary
语法填空
Mike drove to a remote border town alone. He didn’t stop the car 1. ________ (take) a break although he was feeling tired. As a result, a traffic accident occurred, which caused him 2. ______ __ (trap) inside the car. Fortunately a girl who happened to pass by volunteered 3. ________ (save) him, only 4. ________ (find) Mike was completely locked in the car.
After calling an ambulance, she managed 5. ________ (give) him first aid, using the method she had learned at school. Soon, Mike was rushed to hospital in an ambulance. It took him three months 6. _______ _ (recover) from his injuries.
The girl named Mary felt pleased 7. _ _______ (do) such a great thing, though she realized the car may have exploded. When interviewed, she said, “I’ve also met with a traffic accident. A kind passer-by saved my life but he was killed. I was the only one 8. _______ _ (survive) the crash. The man was said 9. _ _________________ (work) on the road helping people in need for ten years. I was too moved even to speak when hearing the story. Therefore, I determined 10. ________ (stay) here and give people in need a helping hand.”
to stay
to take
to be trapped
to save
to find
to give
to recover
to have done
to have survived
to have worked
The greatest wealth is health.
—Virgil
GOOD BYE!
Infinitives as Subject
Discover Useful Structures
Unit 2 HEALTHY
LIFESTYLE
Learning Objectives
1. master the usage of the infinitive as the subject.
2. use the relevant grammar flexibly and authentically in real situations.
3. understand the difference between the infinitive as the subject and the v. -ing form as the subject.
Revision
不定式的形式
1.基本形式： to+动词原形
2.其否定形式是: not to do.
主动语态 被动语态
一般式
进行式
完成式
完成进行式
to do
to be done
to be doing
to have done
to have been done
to have been doing
Leading in
Watch and think
Watch a short vidoe, and pay attention to what they say.
Warming up
It’s difficult for me to get up early.
To get up early is difficult for me.
主语
Infinitive as Subject
Read and Observe
Pay attention to the italicized infinitives and discuss the meanings and functions of the italicised infinitives.
1. To change bad habits is never easy.
2. It took the surgeon three hours to finish my mother’s lung surgery.
3.To join the People’s Liberation Army, it is required for men to shave off their beards.
4. It was not polite to disturb your neighbors with loud music last night.
主语
主语
主语
主语
动词不定式（短语）作主语
直接放在________作主语；
为了保持句子平衡，用________作形式主语，放在句首，把真正的主语 — 动词不定式置于句后；
和_________构成“疑问词+to do”短语作主语。
句首
it
疑问词
Could you find more infinitives in the reading passage
1. However, during this period, it can be easy for some of them to form bad habits.
2. To prevent harmful habits like these from dominating a teenager’s life is essential.
3. To change bad habits is never easy, even with many attempts.
4. After all, it is not easy to break bad habits.
Presentation
Observe
To see is to believe.
To get good grades requires a lot of hard work.
To learn a skill is very important for everyone in society
Discover
1.不定式作主语通常位于______，表示具体的某次动作，谓语动词用______。
句首
单数
Presentation
Observe
It is interesting to play with snow in winter.
It’s important for us to keep the water clean.
It’s very kind of you to help me.
Discover
以上句子的表语都是______。
形容词
it + be + adj + (逻辑主语) + to do sth
Presentation
2. 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。
It is not right for people with the virus to go to public places.
It was not polite to disturb your neighbours with loud music last night.
To join the People’s LiberationArmy , it is a rule for men to shave off their beards.
It took the surgeon three hours to finish my mother’s lung surgery.
Presentation
It is necessary for you to change your job.
It’s difficult for us to learn English well.
It was silly of you to give up such a good chance!
It’s very kind of you to say so.
若adj. “描述人的品格、特点”, 用of,如 kind, nice, wise, silly, polite, impolite, friendly, foolish, clever;
若adj.“描述事或行为的特征”, 用for,如easy, hard, difficult, possible, important, impossible, necessary,good,
bad, exciting, interesting, surprising
常用句型1：It is+adj.+for/of sb +to do sth
Presentation
常见的名词有：pity, shame, pleasure, one’s duty, one’s job, fun, joy, good manners, bad manners等
Summary
常用句型2：It is + n. + (for sb.) to do sth.
It is an honour to give a speech in behalf of my school.
It is a pity to miss the chance to see your show.
It is our duty to do that.
Presentation
It took me more than an hour to do my homework yesterday evening.
It will take us a lot of money to buy that house.
Summary
常用句型3：
It takes/took/will take sb. some time/money to do sth.
做某事花费某人多长时间(钱)
Presentation
3.动词不定式与疑问词who, whom, whose, what, which, when, where, how连用构成不定式短语做主语。
How to use the computer is the question.
如何使用计算机是个问题。
Where to go has not been decided.
去哪儿还没有定下来。
Presentation
4. 补充：不定式短语作独立成分
通常位于句首，有时位于句中或句末，要用逗号同其他句子成分隔开 To tell the truth，I don’t like the gifted actress in the movie.
常用短语
to sum up 总而言之 to be brief 简言之
to tell the truth 说实话 to be exact 确切地说
to conclude 总而言之，最后 to be frank 坦白地说
to begin/start with 首先 to be honest 说老实话
Presentation
（1） （总而言之），most of the committee members supported the idea but a few were against it.
（2） （简言之），he was happy with the result.
（3）She wrote， （确切地说），ten novels in her lifetime.
（4） （首先），he’s too young for that kind of job.
（5） （说老实话），I don’t really want to go to the party tonight.
To sum up/To conclude
To be brief
to be exact
To begin/start with
To be honest
Presentation
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。
Compare the two sentences below and tell the difference in meaning.
Summary不定式作主语和动词-ing形式作主语的区别：
5. 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.
Doing
to do
Practice
Join the words to make full sentences.
1. important / avoid / passive cigarette smoking
It is important to avoid passive cigarette smoking.
2. will take / nutrition specialist / a balanced diet menu / make / an hour / for you
____________________________________________________________
3. useful / turn to / fitness consultant / for advice
____________________________________________________________
4. illegal / dangerous / take / drugs
____________________________________________________________
5. harmful / skip breakfast / often
____________________________________________________________
It will take nutrition specialist an hour to make a balanced diet menu for you.
It is useful to turn to fitness consultant for advice.
It is illegal and dangerous to take drugs.
It is harmful to skip breakfast often.
Complete the conversations with the correct forms of the phrases in the box.
A: Hello, doctor. I want to lose weight, but I just can’ t seem to do it.
What can you do to help me
B: Well, first, it’s necessary to _____________ what you eat. Cut out all
fatty food and sugary drinks, and eat more fruit and vegetables.
A: I really need to ________ a way to exercise more. I could use a
fitness app, but my phone’s full.
B. So delete a few files. I'm sure the app doesn't take up much space.
decide on
begin with be in control of make a choice decide on make up one’s mind
be in control of
Practice
Practice
A: Before exercising, always do a few warm-ups to ___________
B: I know. But then I always feel too tired to continue!
A: Should I go for the pizza or the fried chicken I hate _____________
like these. You know what—I'm going to eat both!
B: Wow! Don’t eat too much junk food—you’ll get fat. I’ve actually
________________ to go on a diet, so I’ll just stick to the fruit salad.
making a choice
made up my mind
begin with
begin with be in control of make a choice decide on make up one’s mind
to do
to do 作主语位于句首，在谓语之前
to do 作主语位于谓语之后，It作形式主语
疑问词+to do 构成不定式短语，作主语
和-ing 作主语的区别
To read without reflecting is like eating without digesting.
It takes sb. time/money to do sth.
It is + adj. + （for/of sb.） to do sth.
It is + n. + (for sb.) to do sth.
to do 表示具体的，将来的动作
-ing 表示一般的，已经完成的动作
与疑问词who, whom, whose, what, which, when, where, how等连用
Summary
语法填空
Mike drove to a remote border town alone. He didn’t stop the car 1. ________ (take) a break although he was feeling tired. As a result, a traffic accident occurred, which caused him 2. ______ __ (trap) inside the car. Fortunately a girl who happened to pass by volunteered 3. ________ (save) him, only 4. ________ (find) Mike was completely locked in the car.
After calling an ambulance, she managed 5. ________ (give) him first aid, using the method she had learned at school. Soon, Mike was rushed to hospital in an ambulance. It took him three months 6. _______ _ (recover) from his injuries.
The girl named Mary felt pleased 7. _ _______ (do) such a great thing, though she realized the car may have exploded. When interviewed, she said, “I’ve also met with a traffic accident. A kind passer-by saved my life but he was killed. I was the only one 8. _______ _ (survive) the crash. The man was said 9. _ _________________ (work) on the road helping people in need for ten years. I was too moved even to speak when hearing the story. Therefore, I determined 10. ________ (stay) here and give people in need a helping hand.”
to stay
to take
to be trapped
to save
to find
to give
to recover
to have done
to have survived
to have worked
The greatest wealth is health.
—Virgil
GOOD BYE!