人教版（2019）选择性必修第三册 Unit2 Healthy Lifestyle不定式做主语课件（23张PPT）
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| 名称 | 人教版（2019）选择性必修第三册 Unit2 Healthy Lifestyle不定式做主语课件（23张PPT） |  | |
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| 资源类型 | 教案 | ||
| 版本资源 | 人教版（2019） | ||
| 科目 | 英语 | ||
| 更新时间 | 2023-02-10 12:04:50 | ||
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(共23张PPT)
Discover useful structures
UNIT 2 HEALTHY LIFESTYLE
1. Master the use of to do as subject in this unit.
2. Students can use “to do” flexibly in their daily life.
Learning Objects
动词不定式
1 动词不定式作主语
（ 1）用作主语的动词不定式及其短语常出现在谓语动词之后，而句首用形式主语it 代替。
It is not right for people with the virus to go to public places.
携带这种病毒的人去公共场所是不对的。
（ 2）不定式作主语位于句首常出现在正式文体中，单个不定式作主 语，谓语动词用单数形式。
To get enough protein each day is beneficial to our health.
每天摄取足够的蛋白质对我们的健康有益。
（3）常用句型：
①It is + adj. + for /of sb. + to do sth.
形容词表示事物或行为的特点或性质，介词用for，
如good，easy， difficult，possible，necessary。
形容词表示人的品格或特点，介词用of，
如kind，polite，impolite， rude，foolish。
It is necessary for us to prevent the war breaking out. 我们有必要防止战争爆发。
It is too impolite of you to speak to an outstanding teacher like this.
你这样对一位杰出的老师说话太无礼了。
②It +be+ 名词+to do sth. 做某事是……
It’s my duty to take good care of my younger sister.
照顾好我的妹妹是我的责任。
It must be great fun to fly to the moon in a spaceship.
乘宇宙飞船飞往月球一定很有趣。
③It takes sb. some time to do sth. 做某事花费某人多长时间
It took me more than an hour to do my homework yesterday evening.
昨天晚上我做作业用了一个多小时。
单句语法填空
（1）Sometimes it’s better （remain） silent.
（2）Although is a hard task to protect our environment，we can’t help but go ahead.
（3） （control） the air pollution is necessary.
（4）It was foolish him to endanger his life in that way.
（5）Don’t you think it is rude him to ask a lady her age
（6）It is difficult him to live on such a small salary.
to remain
it
To control/Controlling
of
of
for
完成句子
（7）I don’t think （你问……是不礼貌的） how long the interview will last.
（8） （保卫…… 是我们的职责） the country against its enemies.
（9） （ …… 花了我半个小时）to wash the clothes.
it is impolite of you to ask
It’s our duty to defend
It took me half an hour
2 疑问词 + 不定式
（1）可用于该结构的疑问词
疑问代词：who，whom，what，which
疑问副词：when，where，how
（2）常接该结构的动词：know，see，decide，tell，ask，consider，explain，learn，wonder
（3）该结构的句法功能：主语、宾语和表语
How to construct the theoretical framework is very important.
怎样构建理论框架很重要。（作主语）
The question is when to start developing such a vaccine.
问题是何时开始研制这种疫苗。（作表语）
I know where to find that patriotic young man.
我知道到哪里去找那个爱国的年轻人。（作宾语）
【学法点拨】
“ 疑问词+不定式”结构相当于一个由疑问词引导的名词性从句。
A judge must decide whose proof to believe.
= A judge must decide whose proof he/she should believe.
法官必须决定相信谁的证据。
单句语法填空
（1）I couldn’t decide bike to buy.
（2）Twenty students want to attend the class that aims to teach how （read） fast.
（3）When and where （vote） hasn’t been decided.
完成句子
（4） （何时装修） the house hasn’t been decided.
（5）They didn’t decide （在哪里举行） the debate.
（6）The question is （怎样拆卸） the machine.
which
to read
to vote
When to decorate
where to hold
how to take apart
3 不定式短语作独立成分
（1）一些不定式短语可用作独立成分，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.
说实话，我不喜欢这部影片中的那个有天赋的女演员。
（2）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
To be frank，your theory is too abstract for the students to understand.
坦白说，你的理论太抽象，学生们理解不了。
完成句子
（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
单个不定式作主语，谓语动词________________
第三人称单数
不定式作主语时,可以用it作___________
形式主语
如果要说明不定式表示的动作是谁做的，
可以在不定式前加一个由 for/of 引起的短语,构成___________________
不定式的复合结构
It is+adj.+for sb to do ……（修饰事物的形容词）
(adj.: easy ,difficult, comfortable, pleasant, light , dangerous， tiresome, interesting , heavy, fit)
Summary
Join the words to make full sentences, and then join the sentences to make a paragraph. You can add your own sentences if necessary to make your paragraph more meaningful.
1. important/ avoid/ passive cigarette smoking
It is important to avoid passive cigarette smoking.
n. 香烟
2. will take/ nutrition specialist/ a balanced diet menu/ make/ an hour/ for you
It will take the nutrition specialist an hour to
make a balanced diet for you.
3. useful/ turn to/ fitness consultant/ for advice
It is useful to turn to the fitness consultant for
advice.
n. 专家
n. 顾问
4. illegal/ dangerous /take drugs
5. harmful / skip breakfast / often
It is illegal and dangerous to take drugs.
It is harmful to skip breakfast often.
n. 毒品，药品
v. 跳过
Complete the conversations with the correct forms of the phrases in the box.
1. 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.
be in control of
begin with, be in control of, make a choice, decide on, make up one’s mind
2. 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.
3. A: Before exercising, always do a few warm-ups to ___________.
B: I know. But then I always feel too tired to continue!
decide on
begin with
begin with, be in control of, make a choice, decide on, make up one’s mind
4. 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 choices
made up my mind
begin with, be in control of, make a choice, decide on, make up one’s mind
1 A: I'm thinking about riding a motorbike to school. What do you think
B: Oh Well, I think it's necessary ________________________________ first.
2 A: How come you fainted suddenly yesterday Didn't you eat anything in the morning
B: I'm on a diet.
A: That's so bad! You know it's important _____________________ every morning.
3 A: I often see you around Central Park.
B: Yes, I like _______________________ there every weekend. We usually play ball games.
4 A: I hear that the new headmaster has too many things to do.
B: Yes. It will be a big challenge for him_____________________________________.
A group of students are chatting after plete the conversations with the correct forms of the phrases in the box.
eat a good breakfast get your parents’ permission
hang out with friends balance work and personal life
to get your parents’ permission
to eat a good breakfast
hanging out with friends
to balance （his） work and personal life
(WORKBOOK P69 EX. 1)
It will take us about half an hour________________（到达）the West Lake. In the morning, we will visit the places of interest around or near the West Lake, including the lake, Gu Hill, Lingyin Temple, and Lei Feng Pagoda. This will be a good chance_____________（欣赏）the beautiful scenery as well as the history and culture of Hangzhou. In the afternoon we may_______（尝试）a taste of Longjing Tea and ___________ （看电影）. For the evening, there are many things we can choose from, like dinner, shopping, and experiencing the local night life. It will be fun for us___________（选择）together what we want to do after you arrive.
A holiday is a perfect time to relax. You are planning a trip to Hangzhou for your American plete the paragraph about your plan.
to reach/get to
to appreciate
have
see a movie
to choose
(WORKBOOK P69 EX. 3)
homework
1. Recite new words and phrases.
2. Write an article about your lifestyle using to do as subject.
THE END
Discover useful structures
UNIT 2 HEALTHY LIFESTYLE
1. Master the use of to do as subject in this unit.
2. Students can use “to do” flexibly in their daily life.
Learning Objects
动词不定式
1 动词不定式作主语
（ 1）用作主语的动词不定式及其短语常出现在谓语动词之后，而句首用形式主语it 代替。
It is not right for people with the virus to go to public places.
携带这种病毒的人去公共场所是不对的。
（ 2）不定式作主语位于句首常出现在正式文体中，单个不定式作主 语，谓语动词用单数形式。
To get enough protein each day is beneficial to our health.
每天摄取足够的蛋白质对我们的健康有益。
（3）常用句型：
①It is + adj. + for /of sb. + to do sth.
形容词表示事物或行为的特点或性质，介词用for，
如good，easy， difficult，possible，necessary。
形容词表示人的品格或特点，介词用of，
如kind，polite，impolite， rude，foolish。
It is necessary for us to prevent the war breaking out. 我们有必要防止战争爆发。
It is too impolite of you to speak to an outstanding teacher like this.
你这样对一位杰出的老师说话太无礼了。
②It +be+ 名词+to do sth. 做某事是……
It’s my duty to take good care of my younger sister.
照顾好我的妹妹是我的责任。
It must be great fun to fly to the moon in a spaceship.
乘宇宙飞船飞往月球一定很有趣。
③It takes sb. some time to do sth. 做某事花费某人多长时间
It took me more than an hour to do my homework yesterday evening.
昨天晚上我做作业用了一个多小时。
单句语法填空
（1）Sometimes it’s better （remain） silent.
（2）Although is a hard task to protect our environment，we can’t help but go ahead.
（3） （control） the air pollution is necessary.
（4）It was foolish him to endanger his life in that way.
（5）Don’t you think it is rude him to ask a lady her age
（6）It is difficult him to live on such a small salary.
to remain
it
To control/Controlling
of
of
for
完成句子
（7）I don’t think （你问……是不礼貌的） how long the interview will last.
（8） （保卫…… 是我们的职责） the country against its enemies.
（9） （ …… 花了我半个小时）to wash the clothes.
it is impolite of you to ask
It’s our duty to defend
It took me half an hour
2 疑问词 + 不定式
（1）可用于该结构的疑问词
疑问代词：who，whom，what，which
疑问副词：when，where，how
（2）常接该结构的动词：know，see，decide，tell，ask，consider，explain，learn，wonder
（3）该结构的句法功能：主语、宾语和表语
How to construct the theoretical framework is very important.
怎样构建理论框架很重要。（作主语）
The question is when to start developing such a vaccine.
问题是何时开始研制这种疫苗。（作表语）
I know where to find that patriotic young man.
我知道到哪里去找那个爱国的年轻人。（作宾语）
【学法点拨】
“ 疑问词+不定式”结构相当于一个由疑问词引导的名词性从句。
A judge must decide whose proof to believe.
= A judge must decide whose proof he/she should believe.
法官必须决定相信谁的证据。
单句语法填空
（1）I couldn’t decide bike to buy.
（2）Twenty students want to attend the class that aims to teach how （read） fast.
（3）When and where （vote） hasn’t been decided.
完成句子
（4） （何时装修） the house hasn’t been decided.
（5）They didn’t decide （在哪里举行） the debate.
（6）The question is （怎样拆卸） the machine.
which
to read
to vote
When to decorate
where to hold
how to take apart
3 不定式短语作独立成分
（1）一些不定式短语可用作独立成分，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.
说实话，我不喜欢这部影片中的那个有天赋的女演员。
（2）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
To be frank，your theory is too abstract for the students to understand.
坦白说，你的理论太抽象，学生们理解不了。
完成句子
（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
单个不定式作主语，谓语动词________________
第三人称单数
不定式作主语时,可以用it作___________
形式主语
如果要说明不定式表示的动作是谁做的，
可以在不定式前加一个由 for/of 引起的短语,构成___________________
不定式的复合结构
It is+adj.+for sb to do ……（修饰事物的形容词）
(adj.: easy ,difficult, comfortable, pleasant, light , dangerous， tiresome, interesting , heavy, fit)
Summary
Join the words to make full sentences, and then join the sentences to make a paragraph. You can add your own sentences if necessary to make your paragraph more meaningful.
1. important/ avoid/ passive cigarette smoking
It is important to avoid passive cigarette smoking.
n. 香烟
2. will take/ nutrition specialist/ a balanced diet menu/ make/ an hour/ for you
It will take the nutrition specialist an hour to
make a balanced diet for you.
3. useful/ turn to/ fitness consultant/ for advice
It is useful to turn to the fitness consultant for
advice.
n. 专家
n. 顾问
4. illegal/ dangerous /take drugs
5. harmful / skip breakfast / often
It is illegal and dangerous to take drugs.
It is harmful to skip breakfast often.
n. 毒品，药品
v. 跳过
Complete the conversations with the correct forms of the phrases in the box.
1. 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.
be in control of
begin with, be in control of, make a choice, decide on, make up one’s mind
2. 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.
3. A: Before exercising, always do a few warm-ups to ___________.
B: I know. But then I always feel too tired to continue!
decide on
begin with
begin with, be in control of, make a choice, decide on, make up one’s mind
4. 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 choices
made up my mind
begin with, be in control of, make a choice, decide on, make up one’s mind
1 A: I'm thinking about riding a motorbike to school. What do you think
B: Oh Well, I think it's necessary ________________________________ first.
2 A: How come you fainted suddenly yesterday Didn't you eat anything in the morning
B: I'm on a diet.
A: That's so bad! You know it's important _____________________ every morning.
3 A: I often see you around Central Park.
B: Yes, I like _______________________ there every weekend. We usually play ball games.
4 A: I hear that the new headmaster has too many things to do.
B: Yes. It will be a big challenge for him_____________________________________.
A group of students are chatting after plete the conversations with the correct forms of the phrases in the box.
eat a good breakfast get your parents’ permission
hang out with friends balance work and personal life
to get your parents’ permission
to eat a good breakfast
hanging out with friends
to balance （his） work and personal life
(WORKBOOK P69 EX. 1)
It will take us about half an hour________________（到达）the West Lake. In the morning, we will visit the places of interest around or near the West Lake, including the lake, Gu Hill, Lingyin Temple, and Lei Feng Pagoda. This will be a good chance_____________（欣赏）the beautiful scenery as well as the history and culture of Hangzhou. In the afternoon we may_______（尝试）a taste of Longjing Tea and ___________ （看电影）. For the evening, there are many things we can choose from, like dinner, shopping, and experiencing the local night life. It will be fun for us___________（选择）together what we want to do after you arrive.
A holiday is a perfect time to relax. You are planning a trip to Hangzhou for your American plete the paragraph about your plan.
to reach/get to
to appreciate
have
see a movie
to choose
(WORKBOOK P69 EX. 3)
homework
1. Recite new words and phrases.
2. Write an article about your lifestyle using to do as subject.
THE END