人教版（2019）选择性必修第三册Unit 2Healthy Lifestyle 不定式做主语课件(27张PPT)
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| 名称 | 人教版（2019）选择性必修第三册Unit 2Healthy Lifestyle 不定式做主语课件(27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 | 2023-02-28 14:19:39 | ||
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(共27张PPT)
UNIT 2
HEALTHY LIFESTYLE
Grammar
To learn infinitives used as subjects
To use infinitives to complete some exercises
不定式的时态和语态(以write为例)：
不 定 式 主 动 被 动
一 般 to write to be written
完 成 to have written to have been written
进 行 to be writing
完成进行 to have been writing
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。
不定式作主语和动词-ing形式作主语的区别：
1）不定式通常表示一个将来的、具体的一次性的动作;
而动词-ing形式则表示一种经常性的、习惯的或抽象的概念。
To look after children is her job today.（一次的）
Looking after children is her work.（经常的）
2）不定式通常表示一件未完成的事或目的;
而动词-ing形式则表示一件已经知道的事或经验。
Climbing mountains is interesting.(经验)
To finish the task will take a long time.(未完成)
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.
To learn a skill is very important for everyone in society.
To finish the building in a month is difficult.
2. “疑问词 + 不定式 ”做主语
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.
Where to go has not been decided.
When and where to vote hasn’t been decided.
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.
It is interesting to play with snow in winter.
It is terrible to see the ship sinking into the sea.
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 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.
It is +adj.+ for/of sb. to do sth.
（说明事或物）
1）It is necessary for young students to learn a foreign language.
2） It is necessary for you to change your job.
3） It was impossible for them to complete the task in such a short time.
4）It’s important for us to keep the water clean.
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.
（说明人的品质）
1)It was silly of you to give up such a good chance！ 2)It’s very kind of you to say so.
3)It is friendly of the family to try to make me feel at home in their house.
4)It was rude of the boy to jump the queue!
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.
1)It must be great fun to fly to the moon in a spaceship.
2)What a pity it is for you to have missed such a wonderful film.
It takes/took/will take sb. some time to do sth.
做某事花费某人多长时间
1）It took me more than an hour to do my homework yesterday evening.
2）How long did it take you to finish the work
3. 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 引起的短语。
2. 不定式作主语时,可以用it作_______________.
It is+adj+for sb to do ……
5. It is+adj+ of sb to do………
(adj: kind, good, nice, wise, unwise, clever, silly,
stupid, foolish, careless, rude, polite, naughty)
（修饰人品形容词）
（修饰物的形容词）
1.单个不定式作主语，谓语动词_____________
单数
形式主语
语法总结
(adj.: easy ,difficult, comfortable, pleasant, light , dangerous， tiresome, interesting , heavy, fit)
for/of
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
P17 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.
adj. 被动的
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
根据句意完成句子。
1. It is not ____________ to show off wealth everywhere.
她到处炫富，这不明智。
2. 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。
wise of her
to reach the goal
3. 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。
4. They realized that __________________（没有什么价值）to argue about the matter.
5. It’s difficult but possible for different people _____________________ (和谐相处) each other. (harmony)
it was convenient
it was of little value
to live in harmony with
6. We wonder how _____________（可能）for a person to learn all the grammar rules.
7. It is impossible for my question ______________ in his absence.
他不在，我的问题就答复不了。
8. It is clever _________________（你相信）Chinese medicine, which is of great help to your disease.
it was possible
to be answered
of you to believe in
9. _______________ 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。
10. ________________（很荣幸）to receive the invitation to such a great party. I was really excited then. (honour)
11. It took a long time __________ the skills he needed to become a professional artist. (acquire)
It is worthwhile
It was an honour
to acquire
Finish the exercises in your workbook.
UNIT 2
HEALTHY LIFESTYLE
Grammar
To learn infinitives used as subjects
To use infinitives to complete some exercises
不定式的时态和语态(以write为例)：
不 定 式 主 动 被 动
一 般 to write to be written
完 成 to have written to have been written
进 行 to be writing
完成进行 to have been writing
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。
不定式作主语和动词-ing形式作主语的区别：
1）不定式通常表示一个将来的、具体的一次性的动作;
而动词-ing形式则表示一种经常性的、习惯的或抽象的概念。
To look after children is her job today.（一次的）
Looking after children is her work.（经常的）
2）不定式通常表示一件未完成的事或目的;
而动词-ing形式则表示一件已经知道的事或经验。
Climbing mountains is interesting.(经验)
To finish the task will take a long time.(未完成)
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.
To learn a skill is very important for everyone in society.
To finish the building in a month is difficult.
2. “疑问词 + 不定式 ”做主语
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.
Where to go has not been decided.
When and where to vote hasn’t been decided.
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.
It is interesting to play with snow in winter.
It is terrible to see the ship sinking into the sea.
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 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.
It is +adj.+ for/of sb. to do sth.
（说明事或物）
1）It is necessary for young students to learn a foreign language.
2） It is necessary for you to change your job.
3） It was impossible for them to complete the task in such a short time.
4）It’s important for us to keep the water clean.
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.
（说明人的品质）
1)It was silly of you to give up such a good chance！ 2)It’s very kind of you to say so.
3)It is friendly of the family to try to make me feel at home in their house.
4)It was rude of the boy to jump the queue!
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.
1)It must be great fun to fly to the moon in a spaceship.
2)What a pity it is for you to have missed such a wonderful film.
It takes/took/will take sb. some time to do sth.
做某事花费某人多长时间
1）It took me more than an hour to do my homework yesterday evening.
2）How long did it take you to finish the work
3. 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 引起的短语。
2. 不定式作主语时,可以用it作_______________.
It is+adj+for sb to do ……
5. It is+adj+ of sb to do………
(adj: kind, good, nice, wise, unwise, clever, silly,
stupid, foolish, careless, rude, polite, naughty)
（修饰人品形容词）
（修饰物的形容词）
1.单个不定式作主语，谓语动词_____________
单数
形式主语
语法总结
(adj.: easy ,difficult, comfortable, pleasant, light , dangerous， tiresome, interesting , heavy, fit)
for/of
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
P17 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.
adj. 被动的
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
根据句意完成句子。
1. It is not ____________ to show off wealth everywhere.
她到处炫富，这不明智。
2. 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。
wise of her
to reach the goal
3. 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。
4. They realized that __________________（没有什么价值）to argue about the matter.
5. It’s difficult but possible for different people _____________________ (和谐相处) each other. (harmony)
it was convenient
it was of little value
to live in harmony with
6. We wonder how _____________（可能）for a person to learn all the grammar rules.
7. It is impossible for my question ______________ in his absence.
他不在，我的问题就答复不了。
8. It is clever _________________（你相信）Chinese medicine, which is of great help to your disease.
it was possible
to be answered
of you to believe in
9. _______________ 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。
10. ________________（很荣幸）to receive the invitation to such a great party. I was really excited then. (honour)
11. It took a long time __________ the skills he needed to become a professional artist. (acquire)
It is worthwhile
It was an honour
to acquire
Finish the exercises in your workbook.