人教版(2019)选择性必修第三册Unit 2 Healthy Lifestyle Discover useful structure不定式作主语课件(共18张PPT)

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名称 人教版(2019)选择性必修第三册Unit 2 Healthy Lifestyle Discover useful structure不定式作主语课件(共18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 2023-12-21 21:01:55

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(共18张PPT)
语法精讲
Unit 2
Teaching objectives:
By the end of this period, you will be able to…
1.master the usage of the infinitive as subject.
2.use the relevant grammar flexibly and authentically in real situation.
3.understand the difference between the infinitive as subject and V-ing form as the subject.
Pay attention to the sentences
Lead-in
It is difficult for me to get up early.
It is kind of you to help me!
To get up early is difficult for me .
To help me is kind of you !
Lead-in
The infinitive in each sentence functions as the subject of the sentence.
Observe
To see is to believe.
To get up early is necessary.
To learn a skill is very important for everyone in society
Discover
1.不定式作主语通常位于______,表示具体的某次动作,谓语动词用______。
句首
单数
Learning
Observe
________ to handle the rubbish is the question.
________ to go for dinner has not been decided.
Discover
1.________ 和动词不定式构成不定式短语作主语
2.可用于该结构的疑问词
疑问代词:
疑问副词:
疑问词
who,whom,what,which
Learning
How
Where
when,where,how
1.When and where________ (vote) hasn’t been decided.
2.____________(何时装修) the house hasn’t been decided
When to decorate
to vote
To work out the problem is not easy.
=It’s not easy to work out the problem.
It is interesting to play with snow in winter.
It is terrible to see the ship sinking into the sea.
Learning
当主语较长,谓语较短时,常用_____________放在句首,
而将真正的主语—________________________。
it作形式主语
不定式放到谓语的后面
Observe
It is interesting to play with snow in winter.
It’s important for us to keep the water clean.
It’s very kind of you to help me.
Discover
以上句子的表语都是______。
形容词
Learning
it + be + adj + (逻辑主语) + to do sth
It is necessary for you to change your job.
It’s difficult for us to learn English well.
It was silly of you to give up such a good chance!
It’s very kind of you to say so.
Learning
若adj. “描述人的品格、特点”, 用of,如 kind, nice, wise, silly, polite, impolite, friendly, foolish, clever;
若adj.“描述事或行为的特征”, 用for,如easy, hard, difficult, possible, important, impossible, necessary,good, bad, exciting, interesting, surprising
常用句型1:It is+adj.+for/of sb +to do sth
Summary
It is necessary ______ young students to learn a foreign language.
It was silly ______ you to give up such a good chance!
It is important _______ us to express our opinions.
It was not polite ______ you to disturb your neighbours with loud music last night.
for
of
of
Show time
for
常见的名词有:pity, shame, pleasure, one’s duty, one’s job, fun, joy, good manners, bad manners等
Learning
Summary
常用句型2:It is + n. + (for sb.) to do sth.
It is an honour to give a speech in behalf of my school.
It is a pity to miss the chance to see your show.
It is our duty to do that.
It took me more than an hour to do my homework yesterday evening.
It will take us a lot of money to buy that house.
Learning
Summary
常用句型3:It takes/took/will take sb. some time/money to do sth. 做某事花费某人多长时间(钱)
To look after children is her job today.
她今天的工作是看孩子。
Looking after children is her work.
她的工作是照顾孩子。
Compare the two sentences below and tell the difference in meaning.
Further thinking
Summary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。
经常性或习惯性
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
1. ______ took us a long time to repair the house.
2. It is foolish _____ you to turn down the proposal(提议).
3. It is important ______ her to prepare for the examination.
4. When you are in trouble, it is _______ (help) to turn to your teacher.
5. To form a good habit _______ (be) difficult while to fall into a bad habit is easy.
6. Whether _________ (hold) a party this weekend hasn’t been known yet.
Show time
Join the words to make full sentences using the infinitive.
1. important/avoid/passive cigarette smoking.
____________________________________________________________
2. will take/nutrition specialist/a balanced diet menu/make /an hour/for you.
_____________________________________________________________
3.useful/turn to/fitness consultant/for advice
_____________________________________________________________
4.illegal /dangerous/take /drugs
_____________________________________________________________
5.harmful/skip breakfast/often
__________________________________________________________________
It is important to avoid passive cigarette smoking.
It will take a nutrition specialist an hour for you to make a balanced diet menu.
It is useful to turn to fitness consultant for advice.
It is illegal and dangerous to take drugs.
It is harmful to often skip breakfast.
Show time
假如你是李华,学英语杂志社的编辑,你收到位高一同学David的求助信。信中提到他刚上高一,学习和心理压力日益加大,他的正常生活受到影响,身体也开始亮起了红灯。请你根据以下要点,给这位同学写一封回信,给他提出建议。
内容包括:
1.安慰
2.具体建议
注意:
1.词数100左右;
2.可以适当增加细节,以使行文连贯
Show time
Dear David
Knowing that you are suffering from great pressure and physical problems after entering senior high school, I feel deeply sorry about it. But don’t worry, _____________________________________________________(我们需要一些时间来适应高中的要求)________________________________________________________(很荣幸能和你分享一些实用的建议)。
As learning is becoming increasingly challenging, _________________________________ (学生感到压力大是很常见的)Only if you balance study and pressure well, can you enjoy your school life better. First and foremost, it is highly recommended that you should go outdoors and take regular exercise. Additionally, ________________________________________(保持均衡健康的饮食是非常重要的) Staying away from junk food and eating healthy food will be of great benefit to you. Last but not least, good health means being both physically and mentally healthy. It is keeping an optimistic state of mind that will contribute to a good physical state.
I hope the advice mentioned above is useful to help you settle problems. I’m looking forward to your good news. Best wishes for your life and wonderful future.
it takes us some time to adjust to the requirements of high school.
It is a great honour for me to share some practical suggestions with you.
it is common for students to feel stressed out.
it is crucial to maintain a balanced and healthy diet.
to do
to do 作主语位于句首,在谓语之前
to do 作主语位于谓语之后,It作形式主语
疑问词+to do 构成不定式短语,作主语
和-ing 作主语的区别
To read without reflecting is like eating without digesting.
It takes sb. time/money to do sth.
It is + adj. + (for/of sb.) to do sth.
It is + n. + (for sb.) to do sth.
to do 表示具体的,将来的动作
-ing 表示一般的,已经完成的动作
与疑问词who, whom, whose, what, which, when, where, how等连用
Summary