资源简介

(共19张PPT)
Discover useful structures
P17
新人教选择性必修
Unit 2 Healthy Lifestyle
Book 3
At the end of the class, you will be able:
1. to master the usage of the infinitive of the verb as the subject
2. to use the relevant grammar flexibly and authentically in the real situation
Learning Objectives
Lead in
Identify the functions of the infinitives
These days, the attitude of many people ①is to just eat food that they think tastes good. However, this can lead to an unbalanced diet, which often results in short-term and long-term health issues. If you want ②to stay healthy, then you need a balanced diet. Needless to say, it is not always easy ③to plan such a diet, but the good thing is that there is a lot of advice out there.
④To save yourself some time, you could try looking at a “food pyramid”—a chart that shows you how much of each type of food ⑤to eat. You could also make healthy food at home and try ⑥to avoid eating packaged foods or fast food. It is essential for you ⑦to eat healthy food. You will feel better, have more energy, and have fewer health problems in later life.
As the subject(主): __________
As the object(宾): ______
As the predicative(表): _________
As the attribute(定): _________
As the adverbial(状): __________
③ ⑦
② ⑥
①
⑤
④
1 To change bad habits is never easy.
2 It took the surgeon three hours to finish my mother’s lung surgery.
3 To join the People’s Liberation Army, it is required for men to shave off their beards.
4 It was not polite to disturb your neighbors with loud music last night.
Explore
Discuss meanings and functions of the italicised infinitives
主语
动词不定式作主语
不定式作主语，表示具体的、一次性的或将来的动作；在很多情况下，人们通常用it作为形式上的主语，而把不定式移到谓语之后，使句子结构显得平稳一些。
To see is to believe.
It is right to give up smoking.
It’s very nice of you to be so considerate.
1. 不定式具有名词的特征，可在句子中充当主语。
To know oneself is difficult.
人贵有自知之明。
2. 不定式和when/where/how/what/whether等连用，在句子中作主语。
Whether to do it hasn’t been decided.
是否去做还没有决定。
①It is+ adj+for sb. +to do sth.常用于表示事物的特征特点，表示客观形式的形容词，如easy, hard, difficult, interesting, impossible等。
It’s very hard for him to study two languages.
对他来说学两门语言是很难的。
3. it作形式主语句型：
②It is+ adj+of sb. +to do sth.的句型一般用表示人物的性格、品质，表示主观感情或态度的形容词，如good, kind, nice, clever, foolish, right等。
It’s very nice of you to help me.
你来帮助我，真是太好了。
③It is+ a/an +n.+to do sth.这样的名词有：a pity, a shame, a pleasure, one’s duty, an honor等。
It’s a great honor to be invited to your birthday party.
很荣幸被邀请参加你的生日聚会。
④It takes/costs/requires sb./sth. to do sth.
It took me two hours to finish the work.
我完成那项工作用了两小时。
注意：
在It is +no use/ no good/ useless/fun/enjoyable/tiring/ interesting/ foolish/nice/a waste of time/ a pleasure ...句型中常用动名词形式做真正的主语。
It’s no use waiting here doing nothing.
无所事事地等待是没有用的。
动词不定式作主语
不定式和动名词作主语的区别
不定式：表示具体的某次动作，特别是将来的动作。
To teach you the uses of the infinitive is my job today.
教你们不定式的用法是我今天的工作。
动词-ing形式：表示比较抽象的、经常性的、一般性动作。
Teaching is my job.
教学是我的工作。
Practice
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
It is important to avoid passive cigarette smoking.
It will take an hour for a nutrition specialist to make a
balanced diet menu for you.
避免被动吸烟是很重要的。
将花费一个小时对于营养专家来做为您准备的均衡饮食菜单。
Join the words to make full sentences using the infinitive.
__________________________________________________
It is useful to turn to a fitness consulant for advice.
向健身顾问寻求建议是有用的。
4. illegal /dangerous/take /drugs
__________________________________________________
5. harmful/skip breakfast/often
_____________________________________________
It is dangerous to take illegal drugs.
It is harmful to skip breakfast (too) often.
服用非法药物是危险的。
经常不吃早餐是有害的。
To get healthy and get rid of bad habits,sometimes it is also a good idea to get professional help.
It will take an hour for a nutrition specialist to make a balanced diet menu for you.It is also useful to turn to a fitness consultant for advice.
You can also help yourself with somecommon sense. For example,
it is harmful to skip breakfast too often. It is important to avoid passive cigarette smoking. And,of course,it is dangerousto take illegal drugs too.
Form a paragraph
Complete the conversations with the correct forms of the phrases in the box.
3
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.
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.
begin with be in control of make a choice
decide on make up one’s mind
be in control of
decide on
主语
宾语
3. A: Before exercising, always do a few warm-ups to__________.
B: I know. But then I always feel too tired to continue!
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.
made up my mind
begin with
to make choices
begin with be in control of make a choice
decide on make up one’s mind
状语
宾语
A group of students are chatting after plete the conversations with the correct forms of the phrases in the box.(p.69)
eat a good breakfast
get your parents’ permission
hang out with friends
balance work and personal life
A: I’m thinking about riding a motorbike to school. What do you think
B: Oh! Well, I think it’s necessary __________________ first.
to get your parents’ permission
Practice
2. A: How come you fainted suddenly yesterday Didn’t you eat anything in the morning
B: I’m on a diet.
A: That’s so bad! You know it’s important __________________ every morning.
3.A: I often see you around Central Park.
B: Yes, I like ____________________ there every weekend. We usually play ball games.
4. A: I hear that the new headmaster has too many things to do.
B: Yes. It will be a big challenge for him _______________.
to eat a good breakfast
hanging out with friends
to balance this work and personal life
A holiday is a perfect time to relax. You are planning a trip to Hangzhou for your American plete the paragraph about your plan.(p.69)
It will take us about half an hour ________ (到达) the West Lake. In the morning, we will visit the places of interest around or near the West Lake, including the lake, Gu Hill, Lingyin Temple, and Lei Feng Pagoda. This will be a good chance ___________ (欣赏) the beautiful scenery as well as the history and culture of Hangzhou. In the afternoon we may _________ (尝试) a taste of Longjing Tea and ______________ (看电影). For the evening, there are many things we can choose from, like dinner, shopping, and experiencing the local night life. It will be fun for us ____________ (选择) together what we want to do after you arrive.
to reach
to appreciate
have
see a movie
to choose
Create
Imitate the paragraph and plan a trip to Dali, Yunnan province
It will take us about two hours to reach Dali Ancient City. In the morning, we will visit the places of interest around or near the Erhai Lake, including the lake, Cangshan Mountain, the Three Pagodas of Chongsheng Temple, and Xizhou Ancient Town. This will be a good chance to enjoy the beautiful scenery as well as the Bai ethnic culture and traditions of Dali. In the afternoon we may try a taste of Bai Three-Course Tea and watch a traditional Bai dance performance. For the evening, there are many things we can choose from, like dinner at Foreigner Street, shopping for tie-dye crafts, and experiencing the local night life. It will be fun for us to choose together what we want to do after you arrive.
possible version
Thank you!

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