选择性必修三 Unit 2 Healthy Lifestyle - Discover useful structures（27张PPT）
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| 名称 | 选择性必修三 Unit 2 Healthy Lifestyle - Discover useful structures（27张PPT） |  | |
| 格式 | pptx | ||
| 文件大小 | 1.7MB | ||
| 资源类型 | 试卷 | ||
| 版本资源 | 人教版（2019） | ||
| 科目 | 英语 | ||
| 更新时间 | 2022-02-05 17:26:53 | ||
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(共28张PPT)
UNIT 2
HEALTHY LIFESTYLE
To learn infinitives used as subjects
To use infinitives to complete some exercises
Look at the following sentences and pay attention to the italicised infinitives. Find more infinitives in the reading passage. In pairs, discuss their meanings and functions.
1 To change bad habits is never easy.
2 It took the surgeon (n.外科医生) three hours to finish my mother’s lung surgery (n. 外科手术).
主语
主语
3 To join the People’s Liberation (n. 解放) Army , it is required for men to shave off (剃掉，刮掉)their beards.
4 It was not polite to disturb(v. 打扰)your neighbours with loud music last night.
目的状语
主语
主语
【Thinking】 What’s the function of the phrase “to join the People’s Liberation Amy” in sentence 3
不定式在句子中可以充当如下成分：
本节课我们主要讲解不定式在句子中作主语的情况。
不定式可以作除“谓语”外的句子成分。
动词不定式作主语常见的三种形式
1. 不定式作主语通常位于句首，表示具体的某次动作，谓语动词用单数。
To see is to believe. 百闻不如一见。
To get up early is necessary. 早起是必要的。
To learn a skill is very important for everyone in society.
学习一项技能对社会上的每个人都很重要。
To finish the building in a month is difficult.
要在一个月内完成这座建筑是困难的。
2. 动词不定式与疑问词how， what，when，where， which等连用构成不定式短语，也可作主语。
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。
3. 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’s not easy to work out the problem.
= To work out the problem is not easy.
计算出这道题不容易。
It is interesting to play with snow in winter.
冬季里玩雪是很有趣的。
It is terrible to see the ship sinking into the sea. 目睹轮船沉入大海，真是太可怕了。
it作形式主语代替真正主语不定式常见于以下情况中：
It is + adj. + for/of sb. to do sth.
It is + n. + for sb. to do sth.
It takes/took/will take sb. some time/ money to do sth.
【温馨提示】
用于此句型的形容词有：easy, hard, difficult, possible, important, impossible, necessary, good, bad, exciting, interesting, surprising等。
1) It is＋adj. (＋for sb.) to do sth.
sb. 是to do sth.的逻辑主语
It is +adj.+ for/of sb. to do sth.
It is necessary for young students to learn a foreign language.
对年轻的学生来说，学习一门外语是必要的。
It is necessary for you to change your job.
你有必要换工作。
It was impossible for them to complete the task in such a short time.
他们不可能在这么短的时间内完成这项任务。
It’s important for us to keep the water clean.
保持水质清洁对我们来说是很重要的。
常见的此类形容词有： kind, nice, wise, silly, polite, impolite, friendly, foolish, clever等。
2) It is＋adj.＋of sb.＋to do sth.
形容词用来表示不定式的逻辑主语（sb.）的性质、特征或品德
It was silly of you to give up such a good chance！ 你放弃这么好的一个机会，真傻!
It’s very kind of you to say so.
你这样说真是太好了。
It is friendly of the family to try to make me feel at home in their house.
这家人对我很友好，使我在他们家里感到宾至如归。
It was rude of the boy to jump the queue!
那个男孩插队真是太无礼了!
常见的名词有：pity, shame, pleasure, one’s duty, one’s job, fun, joy, good manners, bad manners等。
It is + n. + for sb. to do sth.
What a pity it is for you to have missed such a wonderful film.
真遗憾你错过了这样一个精彩的电影。
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。
It takes/took/will take sb. some time/money to do sth.
做某事花费某人多长时间（钱）
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。
It will take us a lot of money to buy that house.
买那套房子要花费我们很多钱。
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/to make a choice
made up my mind
begin with, be in control of, make a choice, decide on, make up one’s mind
根据句意完成句子。
1. Sometimes _____________________ to use examples to explain abstract concepts. (helpful)有时候举例也许有助于解释抽象的概念。
2. It is not ____________ to show off wealth everywhere.
她到处炫富，这不明智。
it might/may be helpful
wise of her
3. In my opinion, it is difficult for us _______________ of improving my oral English in such a short time.
我认为这么短的时间之内提高我们的英语口语，我们难以达到目标。
4. He reminded me that ________________ to buy a house of my own near the school.
他提醒我在学校附近买一个房子很方便。
5. They realized that __________________（没有什么价值）to argue about the matter.
to reach the goal
it was convenient
it was of little value
6. It’s difficult but possible for different people _____________________ (和谐相处) each other. (harmony)
7. We wonder how _____________（可能）for a person to learn all the grammar rules.
8. It is impossible for my question ______________ in his absence.
他不在，我的问题就答复不了。
to live in harmony with
it was possible
to be answered
9. It is clever _________________（你相信）Chinese medicine, which is of great help to your disease.
10. _______________ to pay such a lot of money for their employees’ training these years.
这些年来值得为员工的培训付这么多的钱。
11. ________________（很荣幸）to receive the invitation to such a great party. I was really excited then. (honour)
12. It took a long time __________ the skills he needed to become a professional artist. (acquire)
of you to believe in
It is worthwhile
It was an honour
to acquire
Finish the exercises in your workbook.
UNIT 2
HEALTHY LIFESTYLE
To learn infinitives used as subjects
To use infinitives to complete some exercises
Look at the following sentences and pay attention to the italicised infinitives. Find more infinitives in the reading passage. In pairs, discuss their meanings and functions.
1 To change bad habits is never easy.
2 It took the surgeon (n.外科医生) three hours to finish my mother’s lung surgery (n. 外科手术).
主语
主语
3 To join the People’s Liberation (n. 解放) Army , it is required for men to shave off (剃掉，刮掉)their beards.
4 It was not polite to disturb(v. 打扰)your neighbours with loud music last night.
目的状语
主语
主语
【Thinking】 What’s the function of the phrase “to join the People’s Liberation Amy” in sentence 3
不定式在句子中可以充当如下成分：
本节课我们主要讲解不定式在句子中作主语的情况。
不定式可以作除“谓语”外的句子成分。
动词不定式作主语常见的三种形式
1. 不定式作主语通常位于句首，表示具体的某次动作，谓语动词用单数。
To see is to believe. 百闻不如一见。
To get up early is necessary. 早起是必要的。
To learn a skill is very important for everyone in society.
学习一项技能对社会上的每个人都很重要。
To finish the building in a month is difficult.
要在一个月内完成这座建筑是困难的。
2. 动词不定式与疑问词how， what，when，where， which等连用构成不定式短语，也可作主语。
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。
3. 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’s not easy to work out the problem.
= To work out the problem is not easy.
计算出这道题不容易。
It is interesting to play with snow in winter.
冬季里玩雪是很有趣的。
It is terrible to see the ship sinking into the sea. 目睹轮船沉入大海，真是太可怕了。
it作形式主语代替真正主语不定式常见于以下情况中：
It is + adj. + for/of sb. to do sth.
It is + n. + for sb. to do sth.
It takes/took/will take sb. some time/ money to do sth.
【温馨提示】
用于此句型的形容词有：easy, hard, difficult, possible, important, impossible, necessary, good, bad, exciting, interesting, surprising等。
1) It is＋adj. (＋for sb.) to do sth.
sb. 是to do sth.的逻辑主语
It is +adj.+ for/of sb. to do sth.
It is necessary for young students to learn a foreign language.
对年轻的学生来说，学习一门外语是必要的。
It is necessary for you to change your job.
你有必要换工作。
It was impossible for them to complete the task in such a short time.
他们不可能在这么短的时间内完成这项任务。
It’s important for us to keep the water clean.
保持水质清洁对我们来说是很重要的。
常见的此类形容词有： kind, nice, wise, silly, polite, impolite, friendly, foolish, clever等。
2) It is＋adj.＋of sb.＋to do sth.
形容词用来表示不定式的逻辑主语（sb.）的性质、特征或品德
It was silly of you to give up such a good chance！ 你放弃这么好的一个机会，真傻!
It’s very kind of you to say so.
你这样说真是太好了。
It is friendly of the family to try to make me feel at home in their house.
这家人对我很友好，使我在他们家里感到宾至如归。
It was rude of the boy to jump the queue!
那个男孩插队真是太无礼了!
常见的名词有：pity, shame, pleasure, one’s duty, one’s job, fun, joy, good manners, bad manners等。
It is + n. + for sb. to do sth.
What a pity it is for you to have missed such a wonderful film.
真遗憾你错过了这样一个精彩的电影。
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。
It takes/took/will take sb. some time/money to do sth.
做某事花费某人多长时间（钱）
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。
It will take us a lot of money to buy that house.
买那套房子要花费我们很多钱。
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/to make a choice
made up my mind
begin with, be in control of, make a choice, decide on, make up one’s mind
根据句意完成句子。
1. Sometimes _____________________ to use examples to explain abstract concepts. (helpful)有时候举例也许有助于解释抽象的概念。
2. It is not ____________ to show off wealth everywhere.
她到处炫富，这不明智。
it might/may be helpful
wise of her
3. In my opinion, it is difficult for us _______________ of improving my oral English in such a short time.
我认为这么短的时间之内提高我们的英语口语，我们难以达到目标。
4. He reminded me that ________________ to buy a house of my own near the school.
他提醒我在学校附近买一个房子很方便。
5. They realized that __________________（没有什么价值）to argue about the matter.
to reach the goal
it was convenient
it was of little value
6. It’s difficult but possible for different people _____________________ (和谐相处) each other. (harmony)
7. We wonder how _____________（可能）for a person to learn all the grammar rules.
8. It is impossible for my question ______________ in his absence.
他不在，我的问题就答复不了。
to live in harmony with
it was possible
to be answered
9. It is clever _________________（你相信）Chinese medicine, which is of great help to your disease.
10. _______________ to pay such a lot of money for their employees’ training these years.
这些年来值得为员工的培训付这么多的钱。
11. ________________（很荣幸）to receive the invitation to such a great party. I was really excited then. (honour)
12. It took a long time __________ the skills he needed to become a professional artist. (acquire)
of you to believe in
It is worthwhile
It was an honour
to acquire
Finish the exercises in your workbook.