Unit2 Healthy Lifestyle Discoverusefulstructures(不定式作主语)课件(10张ppt)

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名称 Unit2 Healthy Lifestyle Discoverusefulstructures(不定式作主语)课件(10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 2021-12-29 15:51:32

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(共10张PPT)
Section Ⅲ Grammar——不定式作主语
Teaching objectives
Learn the grammatical content of the infinitive as subject and can use it skillfully
[合作探究] 阅读下列句子,体会动词不定式的用法。
To see is to believe.百闻不如一见。
It is interesting to play with snow in winter.冬季里玩雪是很有趣的。
It’s important for human beings to keep the balance of nature.
保持自然平衡对人类来说很重要。
[自主发现]
不定式是非谓语动词的一种,没有____________的变化,在句中可以作____________(有名词和代词的作用),通常表示____________、____________行为。
人称和数
主语
具体的
特定的
课前预习案
一、用法
不定式位于句首
To study English well is not easy.
学好英语不容易。
it作形式主语,把不定式(短语)置于句末。
为了避免头重脚轻,可用it作形式主语,把不定式(真正主语)放到句子后面。
It would be a great honor for me to invite you to come to China.
邀请你来中国对我来说是一件非常荣幸的事。
As we all know,it is good for your health to stop smoking.
众所周知,戒烟益于健康。
课内探究
二、动名词和不定式作主语的区别
一般来说,不定式作主语表示一次性的、具体的动作,而动名词作主语表示一种抽象的和泛指的动作。
To lie is wrong.
说谎是错误的。(对于说谎者是谁,说话人心中是有所指的)
Swimming is good exercise.
游泳是一项很好的锻炼。(指游泳这项运动)
补全句子
①It takes about ten minutes _________________________.
步行去银行大约用十分钟时间。
②It’s important for you _____________________________.
对你们来说学好外语非常重要。
③It’s very kind ___________________.
你这样说真是太好了。
④It must be great fun _____________________________.
乘宇宙飞船飞往月球一定很有趣。
to walk to the bank
to learn foreign languages well
of you to say so
to fly to the moon in a spaceship
⑤____________________________ hasn’t been decided yet.
什么时候开会还没有定下来呢。
注意:
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 a question.
如何使用计算机是个问题。
When to hold the meeting
课后巩固案
Ⅰ.用括号内所给动词的适当形式填空
1.It is wise (take) such gifts with gratitude.
2.He will find it is easy (make) friends in this city.
3. (get) there by bike will take us half an hour.
4.It is an offence (drop) litter in the street.
5.When (leave) for London has not been decided yet.
6.It’s necessary for you (lock) the car when you do not use it.
7. We can’t afford ________ (live) in such a big house.
8. The man expects his wife ________ (bring) him breakfast in bed at weekends.
9. Afraid of __ ______ (bite) by snakes, the boy was afraid ________ (touch) them.
10. James Watt is known __ ______ (invent) the steam engine.
11.The book was said ____ ____ (translate) into German in 1946.
12.The meeting _____ ___ (hold) tomorrow is of great importance.
13.A quarrel seems ______ __ (break out) between the two women and they are still glaring at each other now.
to take
to make
To get
to drop
to leave
to lock
to have broken out
to live
to bring
being bitten
to touch
to have invented
to have been translated
to be held
Ⅱ.补全句子
1. is a good habit.
每天读书是个好习惯。
2. is nice.
和他们交朋友真是令人愉快。
3. to do me a favour.
你能帮助我真是太好了。
4. does good to your health.
晚饭后散步对健康有好处。
5.It is impossible for lost time .
弥补失去的时间是不可能的。
6.It is difficult for us in a quarter of an hour.
我们很难在15分钟内完成这篇作文。
Reading books every day
To make friends with them
It’s kind of you
Walking after supper
to be made up
to finish writing the composition
Ⅲ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