资源简介

(共21张PPT)
Unit 2 Healthy Lifestyle
3.Learning About Language (2):Structures
问题驱动
To exercise every morning is good for us.
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To keep a balanced diet is important for a healthy life.
思考探究
讨论释疑
巩固检测
总结提升
展示评价
1.To exercise every morning is good for us.
2.To keep a balanced diet is important for a healthy lifestyle.
Summary 1:
动词不定式直接作_______，位于_______，谓语动词用______，
结构是：_________________________________。
主语
句首
单数
use infinitive as the subject
infinitive +predicative verb+ other parts
讨论释疑
思考探究
巩固检测
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展示评价
It is important to keep a balanced diet and do exercise regularly.
To keep a balanced diet and do exercise regularly is important.
问题：当不定式短语较长时，句子会“头重脚轻”，怎么办？
用 it 作形式主语，放在句首，把真正的主语 — 动词不定式置于句后。
主语
思考探究
讨论释疑
巩固检测
总结提升
展示评价
1.It is beneficial to listen to music when you feel anxious .
2.It is useful to talk with friends when you are unhappy.
Summary 2:例句中的结构是_____________________。在此结构中常用it作　　_____　　,而把动词不定式短语(真正主语)后置，为了避免句子头重脚轻。
It + be + adj. + to do sth
形式主语
真正主语
形式主语
positive attitue
思考探究
讨论释疑
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You are wise to avoid junk food .
1.It is wise of you to avoid junk food.
2.It is important for us to drink enough water.
To drink enough water is important for us.
Summary 3:
若adj. “描述人的性格、品质”, 用of,如 kind, silly, polite, foolish等。
若adj.“描述事或行为的特征”, 用for, 如easy, difficult, possible, important等。
结构：It + be + adj. （for/of ) sb + to do sth
diet
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思考探究
讨论释疑
巩固检测
总结提升
展示评价
1.It is good ______ us to eat fresh fruits and vegetables.
2.It is careless ______ him to skip breakfast.
of
for
Fill in the blank by using for/of
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思考探究
讨论释疑
巩固检测
总结提升
展示评价
Summary 4:
由以上的句子可看出，这里采用了____________________的结构，此结构中的名词多是_________名词。常见名词有：pity,
shame, pleasure, honour等。
It is an honour to share practical tips about running.
It is my duty to teach teenagers exercise scientifically.
It is a shame to give up regular exercises.
It + be +a/an+ n. + to do
抽象
形式主语
真正主语
抽象名词
sports
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思考探究
讨论释疑
巩固检测
总结提升
展示评价
1.It takes me 30 minutes to do yoga every evening.
2.It took him lots of energy to climb the mountain.
3.It will take them some money to buy sports equipment.
Summary 5 :
It takes / took / will take sb. time / money / energy to do sth.
花某人时间/金钱/精力做某事
思考探究
讨论释疑
巩固检测
总结提升
展示评价
Summary 6: 动词不定式与疑问词who, whom, whose, what, which, when, where, how等连用构成______________，可作主语，谓语动词用单数形式。
1. When to go to bed is a key question for teens.
什么时候睡觉对青少年们来说是个关键问题。
2.Whether to get enough sleep affects teenager’s health.
是否能获得足够的睡眠影响青少年的健康。
3. How to avoid stay up late is still a question.
怎么避免熬夜仍然是个问题。
“疑问词”+to do
sleep
思考探究
讨论释疑
巩固检测
总结提升
展示评价
1.To have an 8-hour sleep is my plan today.
2. Having an 8-hour sleep is my daily routine.
不定式作主语和动词-ing形式作主语的区别：
动名词作主语表示______________________的行为;不定式作主语表示 _________________________ 动作。
经常性/习惯性/抽象性
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
思考探究
讨论释疑
巩固检测
总结提升
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How to give advice on healthy lifestyle
Healthy lifestyle
What aspects can we think about to give advice
use infinitives as the subject
healthy diet,physical exercise,
enough sleep, positive attitude
思考探究
讨论释疑
巩固检测
总结提升
展示评价
It is important ______ (for/of) us to avoid smoking.
It is kind _____ (for/of) my deskmate to company me when I was sad.
It is a good idea __________ ((listen) to soft music if you feel stressed.
4.It ______ (take) us 2 hours to hike in the park , which helps us stay in good shape.
5.How to reduce the screen time _____(be) really a big challenge.
for
of
to listen
takes
is
思考探究
讨论释疑
巩固检测
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Translation
1.对中学生来说，每天吃一顿营养早餐很重要。
It is + adj. + for sb. + to do sth.
2.你坚持每天跑步来增强体质真是太有毅力了。
It is + adj. + of sb. + to do sth.
3.睡前长时间使用电子产品是个不好的习惯。
It is + a/an+n. + to do sth.
4.每周花两小时阅读文学作品能帮助我们放松心情。
It takes sb. + time + to do sth.
5.培养一个爱好，比如跳舞是缓解压力的好方法。
It is + a/an+n. + to do sth.

思考探究
讨论释疑
巩固检测
总结提升
展示评价
应用实践：翻译句子
1.对中学生来说，每天吃一顿营养早餐很重要。
2.你坚持每天跑步来增强体质真是太有毅力了。
3.睡前长时间使用电子产品是个不好的习惯。
4.每周花两小时阅读文学经典能帮助我们放松心情。
5.培养一个爱好，比如跳舞是缓解压力的好方法。
It is important for middle school students to have a nutritious breakfast every day.
It is determined of you to keep running every day to build up your body.
It is a bad habit to use electronic products for a long time before going to bed.
It takes us two hours to read classics every week to help us relax.
It is a good way to develop a hobby like dancing to relieve stress.
思考探究
讨论释疑
巩固检测
总结提升
展示评价
Group work——Creation （4 students in a group)
Choose one topic and make a poster
Topic: diet, exercise, sleep, attitude/mood
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思考探究
讨论释疑
巩固检测
总结提升
展示评价
思考探究
讨论释疑
巩固检测
总结提升
展示评价
At the end of the class, I can: Try hard Good Excellent
1.Discover the structures and meanings of infinitive as the subject.
2.Apply infinitive as the subject properly to give advice on healthy lifestyle.
3.Realize the importance of living a healthy life.
思考探究
讨论释疑
巩固检测
总结提升
展示评价
思考探究
讨论释疑
巩固检测
总结提升
展示评价
infinitives function as subject
structures
meaning
1.不定式直接作主语，放于句首。
2.为避免头重脚轻，用it 作形式主语，不定式作真正主语放于句末。
it+be+adj+(for/of +sb)+to do
it+be+a(an)+n+ to do
it+ takes/took/will take sb +money/time+ to do
不定式作主语，表示具体的、一次性的动作。
3.疑问词+to do 可作主语
1. Finish the exercise 2&3 in the textbook. (P17)
2. Write a letter to give advice on how to handle stress.(optional)
思考探究
讨论释疑
巩固检测
总结提升
展示评价

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