Unit 2 Discover useful structures ppt课件-（2022新）人教版高中英语选择性必修第三册.pptx

1、Unit2 Healthy LifestyleEarly to bed and ealy to rise makes a man healthy, wealthy and wise.早睡早起使人健康、富有早睡早起使人健康、富有又又聪明。聪明。Not to advance is to go back.（逆水行舟）不进则退。（逆水行舟）不进则退。To save time is to lengthen life.节约时间就是延长生命。节约时间就是延长生命。It is easy to open a shop, but hard to keep it always open.开店容易，守店难。（打江山容

2、易，守江山难。）开店容易，守店难。（打江山容易，守江山难。）Its hard to please all.众口难调。众口难调。 The Infinitive as subject. The Infinitive (to do )Learning objectives:1. To know the different forms of the infinitive;2. To master the use of the Infinitive as subject;3. To use the Infinitive as subject in the specific context correct

3、ly.(1)Perhaps the best way to understand Western art is _(look) at the development of Western painting over the centuries.(2)During the Middle Ages，the purpose of Western art was _ (teach) people about Christianity.(3)In this work，Monets aim was _(convey) the light and movement in the scene.(4) Her

4、ambition is _(put) her new ideas into practice.(5) What they attempted to do was no longer _(show) reality, but instead to ask the question, “What is art?”Reviewto lookto teachto conveyto putshow不定式的时态和语态不定式的时态和语态 1. To talk with him is a great pleasure. 2. The meeting to be held next week is about

5、the COVID-19.3. When the teacher came in, he pretended to be reading.3. Some items on display are thought to have come from the collection of Emperor Qianlong.4. The dog was said to have been killed by a wanderer.不不 定定 式式 主主 动动 被被 动动 一一 般般 to do to be done 进进 行行 to be doing完完 成成 to have done to have

6、 been done谓语动作发生时，不谓语动作发生时，不定式动作正在进行。定式动作正在进行。不定式动作发生不定式动作发生在谓语动作之前。在谓语动作之前。More sentences in the reading passage (Find the subject of each sentence.).1. However, during this period, it can be easy for some of them to form bad habits.2. To prevent harmful habits like these from dominating a teenager

7、s life is essential.3. To change bad habits is never easy, even with many attempts.4. After all, it is not easy to break bad habits.to form bad habits To prevent harmful habits like these from dominating a teenagers lifeTo change bad habitsto break bad habits动词不定式作主语常见的三个要点动词不定式作主语常见的三个要点1. 不定式作主语不定

8、式作主语通常通常位于句首位于句首，表示具体的某次动作，表示具体的某次动作，谓语谓语动词用单数动词用单数。 e.g. To see is to believe. 百闻不如一见。百闻不如一见。 To get up early is necessary. 早起是必要的。早起是必要的。To learn a skill is very important for everyone in society.学习一项技能对社会上的每个人都很重要。学习一项技能对社会上的每个人都很重要。To finish the building in a month is difficult. 要在一个月内完成这座建筑是困难的

9、。要在一个月内完成这座建筑是困难的。2. 动词不定式与动词不定式与疑问词疑问词who, whom, whose, what, which, when, where, how等等连用构成不定式短语，也可作主语。连用构成不定式短语，也可作主语。 e.g. How to use the computer is the question.如何使用计算机是个问题。如何使用计算机是个问题。 Where to go has not been decided. 去哪儿还没有定下来。去哪儿还没有定下来。 How to use the computerWhere to go3. 当主语较长，谓语较短时，常用当主语

10、较长，谓语较短时，常用it作形式主语作形式主语放在句首，放在句首，而将真正的主语而将真正的主语不定式放到谓语的后面不定式放到谓语的后面(1) It was not polite to disturb your neighbours with loud music last night.(2) To join the Peoples Liberation (n. 解放解放) Army , it is a rule for men to shave off their beards.(3) It took the surgeon (n.外科医生外科医生) three hours to finish

11、 my mothers lung surgery (n. 外科手术外科手术).it作形式主语代替真正主语不定式常见于以下情况中：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.常见的名词有：常见的名词有：pity,shame,pleasure,ones duty,ones job,fun,joy,good manners,bad manners等。等。It takes/took/will take sb. some time/money to do sth.【

12、温馨提示温馨提示】常用于表示事物的特征，用于常用于表示事物的特征，用于此句型的形容词有：此句型的形容词有：easy,hard,difficult,possible,important,impossible,necessary,good,bad,exciting,interesting,surprising等。等。1) It is adj. for sb. to do sth.sb. 是是to do sth.的逻辑主语的逻辑主语It is +adj.+ for/of sb. to do sth.e.g. It is necessary for young students to learn af

13、oreign language. 对对年轻的学生来说，学习一门外语是必要的。年轻的学生来说，学习一门外语是必要的。It was impossible for them to complete the task in such a short time. 他们他们不可能在这么短的时间内完成这项任务。不可能在这么短的时间内完成这项任务。Its important for us to keep the water clean. 保持保持水质清洁对我们来说是很重要的。水质清洁对我们来说是很重要的。常见的此类形容词有：常见的此类形容词有：kind,nice,wise,silly,polite,impol

14、ite,friendly,foolish,clever等。等。2) It isadj.of sb.to do sth. 形容词用来表示不定式的逻辑形容词用来表示不定式的逻辑主语主语(sb.)的的性质、特征或品德性质、特征或品德e.g. It was silly of you to give up such a good chance！ 你你放弃这么好的一个机会，真傻放弃这么好的一个机会，真傻!Its very kind of you to say so. 你你这样说真是太好了。这样说真是太好了。 It is friendly of the family to try to make me fe

15、el at home in their house. 这这家人对我很友好，使我在他们家里感到宾至如归。家人对我很友好，使我在他们家里感到宾至如归。u It was rude _ the boy to jump the queue! u It is necessary _ you to change your job. uIt was foolish _ you turn down their help.offorofI. Join the words to make full sentences, and then join the sentences to make a paragraph.

16、 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. n. 香烟香烟2. will take / nutrition specialist / a balanced diet menu / make / an hour / for youIt will take the nutri

17、tion specialist an hour to make a balanced diet for you.3. useful / turn to / fitness consultant / for adviceIt is useful to turn to the fitness consultant foradvice.n. 专家专家n. 顾问顾问4. illegal / dangerous / take drugs5. harmful / skip breakfast / oftenIt is illegal and dangerous to take drugs.It is ha

18、rmful to skip breakfast often.n. 毒品，药品毒品，药品v. 跳过跳过3. 3. 如果要说明不定式表示的动作是谁做的，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可以在不定式前加一个由 for/of for/of 引起的短语引起的短语, ,构成构成_。2. 不定式作主语时不定式作主语时,可以用可以用it作作_.(1) It is+adj+for sb to do (2) It is+adj+ of sb to do(adj: kind, good, nice, wise, unwise, clever, silly, stupid, foolish,

19、 careless, rude, polite, naughty)（修饰（修饰人品人品形容词）形容词）（修饰物的形容词）（修饰物的形容词）1.单个不定式作主语，谓语动词单个不定式作主语，谓语动词_单数单数形式主语形式主语不定式的复合结构不定式的复合结构(adj.: easy ,difficult, comfortable, pleasant, light , dangerous， tiresome, interesting , heavy, fit)I.补全句子补全句子1. is a good habit.每天读书是个好习惯。每天读书是个好习惯。2. is nice.和他们交朋友真是令人愉快。

20、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。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。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。弥补失去的时间是不可能的。6.It is difficult for us in a quarter of an hour.我们很难在我们很难在15分钟内完成这篇作文。分钟内完成这篇作文。Reading books every dayTo make friends with themIts

21、 kind of youWalking after supperto be made upto finish writing the compositionII.语法填空语法填空 Mike drove to a remote border town alone. He didnt 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. Fortun

22、ately 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 thre

23、e 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, “Ive also met with a traffic accident. A kind passer-by saved my life but he was killed. I was the only one 8. _ _

24、(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 findto give to recov

25、erto have done to have survived to have worked III. Complete the conversations with the correct forms of the phrases in the box.1. A: Hello, doctor. I want to lose weight, but I just cant seem to do it. What can you do to help me?B: Well, first, its necessary to _ what you eat. Cut out all fatty foo

26、d and sugary drinks, and eat more fruit and vegetables.be in control ofbegin with, be in control of, make a choice, decide on, make up ones mind2. A: I really need to _ a way to exercise more. I could use a fitness app, but my phones full.B: So delete a few files. Im sure the app doesnt take up much

27、 space.3. A: Before exercising, always do a few warm-ups to _.B: I know. But then I always feel too tired to continue!decide onbegin withbegin with, be in control of, make a choice, decide on, make up ones mind4. A: Should I go for the pizza or the fried chicken? I hate _ like these. You know what Im going to eat both!B: Wow! Dont eat too much junk food youll get fat, Ive actually _ to go on a diet, so Ill just stick to the fruit salad.making choicesmade up my mindbegin with, be in control of, make a choice, decide on, make up ones mind谢谢观看谢谢观看Unit 2