Unit 2 Section Ⅱ Discover useful structures-【金版新学案】2025-2026学年高中英语选择性必修第三册同步课堂高效讲义配套课件（人教版）

该高中英语课件围绕“健康的生活方式”主题，聚焦动词不定式作主语语法点，通过短文阅读引导学生感知黑体部分自主归纳用法，再系统讲解基本用法（直接作主语、it作形式主语）及与动名词的区别，结合“巧学活用”练习构建从感知到应用的学习支架。 其亮点在于融合语言能力与思维品质培养，语法部分通过“我的发现”引导自主探究，语基讲解结合教材原句和语境练习，测评含语篇填空、阅读理解等。实例如动词不定式与动名词作主语的对比练习，提升学生语法应用能力，帮助教师高效开展分层教学，促进学生语言能力和学习能力发展。

UNIT 2　HEALTHY LIFESTYLE 主题语境：人与自我——健康的生活方式 Section Ⅱ　Discover useful structures 内容索引 语法冲关　详析义 1 语基讲练　提能力 2 课时测评 3 语法冲关　详析义 返回 ——动词不定式作主语 阅读以下短文，感知黑体部分，并完成练习。 语法串烧 我的发现 Develop a healthy lifestyle 　　①How to keep healthy is always a concern for people.First of all，it is important for you ②to have a light diet every day to maintain good health.Second，③to go to bed early and get up early not only is good for health and helps prevent disease but also keeps you in good shape.Third，it's wise of you ④to laugh more every day，which can help you improve your health through good emotional control.It's important ⑤to follow good habits and keep a positive attitude.In addition，⑥to exercise for half an hour every day can improve circulation and make your body healthier.Finally，to promote health，it is also an effective way ⑦to drink enough water every day. 1.黑体部分均为___________作主语。 2．加黑处①为疑问词____＋___________作主语。 3．加黑处③⑥为动词不定式_____作主语。 4．加黑处②④⑤⑦所在句中动词不定式作___________，it在句中作_________。 动词不定式　 how 动词不定式　 直接　 真正的主语 形式主语 语法知识精讲 动词不定式作主语 动词不定式是非谓语动词的一种，没有人称和数的变化，在句中可以作主语(有名词和代词的作用)，通常表示具体的、特定的行为。 1．动词不定式作主语的基本用法 (1)动词不定式位于句首 To study English well is not easy. 学好英语不容易。 To save money now seems impossible. 现在想省钱似乎是不可能的。 (2)多数情况用it作形式主语，把真正的主语(动词不定式)置于句末，特别是动词不定式短语较长时。常用于下列句式中。 ①It＋be＋名词＋to do It's our duty to take good care of the old. 照顾老人是我们的责任。 ②It＋be＋形容词＋(for/of sb)＋to do It is difficult for us to finish writing the composition in a quarter of an hour. 我们很难在十五分钟内写完这篇作文。 It's clever of you to work out the maths problem. 你能解出这道数学题真聪明。 温馨提示　1.该句式结构中for sb前常用表示事物的特征、特点的形容词，如easy，hard，difficult，interesting，impossible等。 It's necessary for you to lock the car when you do not use it. 当你不用车的时候，锁车是有必要的。 2．of sb前一般用表示人物的性格、品德及主观感情或态度的形容词，如good，kind，nice，clever，foolish，right等。 It was silly of us to believe him. 我们真愚蠢，竟然相信了他。 3．“疑问词＋动词不定式短语”作主语可置于句首。 How to use the computer is a question. 如何使用计算机是个问题。 巧学活用1——完成句子 ①每天练习说英语对于提高你的语言技能非常重要。 It is ___________________________________________ to improve your language skills. ②解决这个问题需要时间和努力。 ___________________ takes both time and effort. ③他们为慈善捐款真是慷慨。 It is ______________________________ to the charity. ④学生在考试前定期复习笔记是很有帮助的。 ________________________ review their notes regularly before exams. ⑤如何解决这个问题对大家来说都不清楚。 _______________________ is unclear to everyone. important to practice speaking English every day To solve this problem　 generous of them to donate money It is helpful for students to How to solve this problem 2．动词不定式与动词-ing形式作主语的区别 (1)动词-ing形式作主语通常表示抽象动作；而动词不定式作主语表示具体动作。 Smoking is prohibited here. 这里禁止抽烟。(抽象) It is not good for you to smoke so much. 你抽这么多烟对你身体不好。(具体) (2)动词-ing形式短语作主语时，通常用以表示一件已知的事或经验。动词不定式短语作主语时，通常用来表示一件未完成的事或目的。 Climbing mountains is interesting. 爬山很有趣。(经验) To finish the task will take a long time. 完成这项任务将要花费很长时间。(未完成的事) (3)动词不定式作主语，一般用it作形式主语，把作真正的主语的动词不定式短语后置。动词-ing形式作真正的主语的句型有：It's no good (use，fun) doing/It's a waste of time doing等。 It took me only five minutes to finish the job. 我仅用了5分钟便完成了工作。 It is no good arguing with him.He never listens to others.和他争论没用，他从不听别人的。 巧学活用2——单句语法填空 ①It is a waste of time _______ (argue) with her. ②It is clever of you _______ (find) a solution to the problem so quickly. ③It is no use ______ (cry) over the split milk. ④_________(finish) reading the book will take you two hours. ⑤________ (read) books is a great way to relax and reduce stress. arguing　 to find　 crying　 To finish　 Reading 知识网络 返回 语基讲练　提能力 返回 核心词汇练全 　　make up one's mind下定决心 (教材原句)We need to make up our minds and show some discipline ... 我们需要下定决心，表现出一些纪律性……   change one's mind 改变主意 bear/keep ...in mind 将……记在心中；记起；考虑 have ...in mind 考虑；打算 keep/fix one's mind on/upon 将注意力集中于…… come to/into one's mind 突然记起(或想到) read one's mind 看出某人的心思　　 温馨提示　make up one's mind中的名词mind有单复数的变化，根据one's的单复数来确定mind的单复数。 1 归 纳 完成句子 上周，我原本打算去度假，但考虑到即将到来的考试，我改变了主意。我记得，努力学习会为以后带来帮助。一个关于如何改进我的学习计划的新想法突然出现在我的脑海里。几乎就像你能读懂我的心思——我意识到我需要更加有条理。 Last week，I was thinking about taking a vacation，but I _________________ after considering my exams.I ___________ that studying hard now will help me later.Then a new idea __________________ about improving my study routine. It's almost as if you can _____________—I realize I need to stay more organized. changed my mind keep in mind came to my mind read my mind be composed of 由……组成(或构成)的 (教材原句)Life is composed of many elements，such as family，friends，study，work，entertainment，and so on. 生命是由许多元素组成的，比如家庭、朋友、学习、工作和娱乐等。   (1)be composed of＝be made up of＝consist of　　　 由……组成/构成 (2)compose vt. 组成；作曲；撰写 composition n. 作文；作曲；作品；成分 composer n. 作曲家；创作者　　 2 归 纳 单句语法填空/一句多译 (1)The scene moved him ___________ (compose) a poem. (2)We had to write a ___________ (compose) on the subject “My Pet”． (3) Beethoven is one of the most famous _________ (compose) in history. to compose　 composition　 composers (4)以个人或集体朗诵中国古典文学作品和才艺表演为形式的中国古典文学朗诵比赛受到所有学生的欢迎。 →A Chinese Classical Literature Recitation contest ______________________ ____________________ reciting Chinese classical literature individually or in a group and talent shows is popular with all the students.(定语从句) →A Chinese Classical Literature Recitation contest ______________________ _______________ reciting Chinese classical literature individually or in a group and talent shows is popular with all the students.(分词作定语) which is composed of/is made up of/consists of composed of/made up of/consisting of disturb vt.打扰；搅乱；使烦恼 (教材原句)It was not polite to disturb your neighbours with loud music last night. 昨天晚上大声放音乐打扰你的邻居是不礼貌的。   disturbed adj.　　 心神不安的；心烦意乱的；烦恼的 disturbing adj. 引起烦恼的；令人不安的 disturbance n. 打扰；扰乱　　 3 归 纳 返回 单句语法填空/完成句子 (1)They have developed these techniques to help those who are _________ (disturb) by hearing voices. (2)Equally __________ (disturb) is the fact that soon there will be a shortage of qualified teachers. (3)Successful breeding requires quiet，peaceful conditions with as little ____________(disturb) as possible. (4)她意识到自己孤单一人，心里感到很不安。 _______________________ that she was alone. disturbed　 disturbing　 disturbance　 It disturbed her to realize 课时测评 返回 语境基础练 Ⅰ.单句语法填空(每小题1分，共10分) 1．To read English aloud every morning _____(do) you a lot of good. 2．It is necessary for high school students ________(learn) another foreign language. 3．It took him a long time _________ (acquire) the skills that he needed for his job. 4．It's my great honour ________ (give) a speech here on how to improve English. 5．________(read) English novels this evening will take most of my time. does　 to learn　 to acquire　 to give　 To read　 6．He had to make ____ his mind quickly about which piece of art to submit for the exhibition. 7．She awoke early after a _________ (disturb) night. 8．Beethoven is a well-known _________(compose) of classical music，whose music is very touching.Listen! This is my favourite melody and it is one of his great ____________ (composition). 9．She disliked him so much that she ________ (skip) over any articles which mentioned him. 10．It is said that several ___________ (specialist) will come to assess the project. up disturbed　 composer compositions　 skipped　 specialists Ⅱ.完成句子(每小题3分，共18分) 1．作为一名交换生，探索新校园并满足你的好奇心是很有趣的。(It is/was＋形容词＋to do sth) As an exchange student，____________________________________ and satisfy your curiosity. 2．对于你来说，在新学校交朋友是个非常棒的主意。(it作形式主语) __________________________________ in the new school. 3．被一所重点大学录取是我一直追求的目标。 __________________________________ is the goal I have been pursuing. it is interesting to explore the new campus It's a great idea for you to make friends To be admitted to/into a key university 4．什么时候出发去机场取决于交通情况。 __________________________ depends on the traffic. 5．哭没有用，而且只有努力才能改变你现在糟糕的处境。 _________________，and it is hard work that can change your present terrible situation. 6．我很荣幸能代表同学们发表毕业演讲。 ________________________________ a graduation speech on behalf of my classmates. When to leave for the airport It is no use crying It is a great honour for me to deliver Ⅲ.语法与语篇(每小题1分，共8分) Dear Tom， 　　It's so nice 1.________(hear) that you want to come to Beijing 2._________ (study).It's necessary 3.__________(remind) you of a few things.The streets of Beijing are very crowded，so it is best for you 4.________(take) a bus or subway.It is very convenient. You can also ride a bike，but when you do not use it，it's necessary 5.________(lock) it.Also，don't easily trust people whom you don't know，in case you are cheated.Of course，you should believe that there are many kind people in the world.When you visit a friend's home，remember 6._________(bring) something your host likes.It seems impolite of you not 7.________(give) anything.If you are in trouble，remember to call me in time.I will help you，because it is easy for me 8.______(do) it. Yours， Li Hua to hear to study to remind to take to lock to bring to give to do Ⅰ.阅读理解(每小题2.5分，共20分) A (2024·秋江苏无锡高二期终测试) Whether you shop for food in a traditional grocery store or a big-box store，most of your options are junk foods.Terms on food packaging like “low fat”， “gluten-free”， “keto-friendly” and “a good source of fiber” don't answer the fundamental question：Is this food good for me? There is little reliable guidance available for people who don't have the time，patience or skill to analyze the nutrition labels (标签). 素能提升练 But what we really need is a bold (大胆的) move that would be to prevent people from food that's bad for them：a warning sign that a high-sugar soda or breakfast cereal product，for example，is an unhealthy choice. Chile，Mexico，Brazil and dozens of other countries have worked to change food labeling.Research has suggested that these labels can help people understand nutritional quality and change their purchasing habits.Finally，the goal of the labels is to improve nutrition and reduce the consumption of over-processed foods. After Chile adopted several rules in 2016，researchers found that the consumption of drinks high in sugar and sodium declined by nearly 25 percent.In Uruguay a survey published in 2020 assessing the early effects of nutritional warnings found that 58 percent of participants who noticed the warning changed their decisions about buying a product.Of those who changed their decisions，17 percent said they chose a similar product with fewer warnings，and 18 percent decided not to buy a similar product at all. In the United States，new labeling laws will be much more challenging to take effect.As you might expect，food producers will surely try to stop warning labels from being required.They are arguing that these plans would be costly and that those costs would be passed on to consumers.But research conducted soon after Chile's food labeling and advertising law passed showed no effects on total employment and negligible effects on wages (工资) and profit，even as consumer consumption of unhealthy foods declined. To be clear，this is just one of many steps toward providing all Americans with a healthy diet.But knowable front-of-package labeling is one of the best levers (杠杆) available to policymakers，and it is already working elsewhere.It can work here，too. 语篇解读　本文是一篇说明文。文章指出消费者当下购买的食物多为垃圾食品，包装标签难以帮助他们判断食物好坏，智利等多国改变食品标签且取得成效，美国实施新标签法遇阻，但有研究表明其负面影响小，应该推行这种措施。 1．What does Paragraph 1 focus on? A．The doubt about nutrition. B．The problem with labels. C．The doubt about package. D．The problem with food. 段落大意题。根据第一段内容可知，本段指出食品标签不能有效帮助消费者判断食物是否有益这一问题，强调的是食品标签存在的问题。故选B项。 √ 2．What do the examples of Chile and Uruguay show? A．Warning labels can effectively change people's buying behavior. B．People in the two countries have better nutrition awareness. C．Food producers there work well with the government. D．The consumption of over-processed foods has been stopped. 推理判断题。根据第四段内容可推知，这些具体的数据和例子表明，食品上的警告标签能够切实有效地影响人们在购物时的选择，从而改变他们的购买行为。故选A项。 √ 3．What does the underlined word “negligible” mean in Paragraph 5? A．Obvious. B．Lasting. C．Insignificant. D．Huge. 词义猜测题。根据画线词的上文“They are arguing that these plans would be costly and that those costs would be passed on to consumers.But research conducted soon after Chile's food labeling and advertising law passed showed no effects on total employment”可知，虽然食品生产商反对警告标签，认为成本高且成本会转嫁给消费者，但实际上影响不大，对工资和利润影响应该是“微不足道的，不值一提的”，画线词意思与insignificant“微不足道的，不显著的”接近。故选C项。 √ 4．What's the author's attitude towards adopting warning labels in the United States? A．Unclear. B．Opposing. C．Doubtful. D．Supportive. 观点态度题。作者在文中列举了其他国家实施食品警告标签取得的积极效果，并在最后一段“But knowable front-of-package labeling is one of the best levers (杠杆) available to policymakers，and it is already working elsewhere. It can work here，too.”中指出这一举措在美国应该也是可行的。由此可知，作者对在美国采用警告标签持支持态度。故选D项。 √ B (2025·深圳市高级中学高二第一学期期中测试) Taking at least twenty minutes out of your day to walk or sit in a place that makes you feel in contact with nature will significantly lower your stress hormone levels.That's the finding of a study that has established for the first time the most effective amount of an urban nature experience.Health care professionals can use this discovery to prescribe (开药) “nature-pills” in the knowledge that they have a real measurable effect. “We know that spending time in nature reduces stress，but until now it was unclear how much is enough，how often to do it，or even what kind of nature experience will benefit us，” says Dr.Hunter，a lead author of this research.“Our study shows that for the greatest payoff，in terms of efficiently lowering levels of the stress hormone，you should spend 20 to 30 minutes sitting or walking in a place that provides you with a sense of nature. To assist health care professionals looking for evidence-based guidelines on what exactly to distribute，Hunter and her colleagues designed an experiment that would give a realistic estimate of an effective amount. Over an 8-week period，participants were asked to take a nature pill with a duration of 10 minutes or more，at least 3 times a week.Levels of stress hormone were measured from saliva (唾液)samples taken before and after a nature pill，once every two weeks.The data revealed that just a twenty-minute nature experience was enough to significantly reduce stress levels. “Health care professionals can use our results as an evidence-based rule of thumb on what to put in a nature-pill prescription，”said Hunter.“It provides the first estimates of how nature experiences impact stress levels in the context of normal daily life.It breaks new ground by addressing some of the complexities of measuring an effective nature amount.” 语篇解读　本文是一篇说明文。文章介绍了研究发现在自然中待一段时间会降低压力水平。 5．What's the great significance of the study? A．It finds out a new way to release stress. B．It can help doctors prescribe various pills. C．It makes it clear that exercise can help release stress. D．It finds out the accurate amount of nature experience. 细节理解题。根据第一段中的“That's the finding of a study that has established for the first time the most effective amount of an urban nature experience.”可知，这项研究的意义在于它精确地确定了接触自然的时间量，故D项正确。 √ 6．How did Hunter get the finding? A．By working with some doctors. B．By asking participants questions. C．By carrying out an experiment. D．By comparing the previous data. 细节理解题。根据第三段中的“Hunter and her colleagues designed an experiment that would give a realistic estimate of an effective amount”可知，Hunter是通过实验得出这一结果的，故C项正确。 √ 7．What did Hunter think of the result of the study? A．It has drawbacks. B．It's meaningful. C．It's worth researching further. D．It needs more discussions. 推理判断题。根据最后一段中的“It breaks new ground by addressing some of the complexities of measuring an effective nature amount.”可知，这项研究的结果解决了测量有效接触自然时间量的复杂性，开辟了新的领域，由此可知，Hunter认为这项研究的结果是有意义的，故B项正确。 √ 8．What's the main idea of the text? A．Nature has close relationship with stress. B．We should stay in nature to keep healthy. C．We cannot get close to nature frequently. D．Staying in nature for proper time will lower stress level. 主旨大意题。根据第一段中“Taking at least twenty minutes out of your day to walk or sit in a place that makes you feel in contact with nature will significantly lower your stress hormone levels.”可知，每天至少抽出20分钟的时间去散步或坐在一个能让你感觉到与自然接触的地方，这会大大降低你的压力荷尔蒙水平，由此可知，本文介绍的是研究发现在自然中待一段时间会降低压力水平，故D项正确。 √ Ⅱ.语法填空(每小题1.5分，共15分) (2025·广东省高二期末模拟卷) Tai chi is often described as “meditation in motion”， but it might well 1._________ (call) “medication in motion”. There is growing evidence that this mind-body practice，which 2.__________ (originate) in China as a martial art in the late Ming and early Qing dynasties，has value in treating or preventing many health problems.And you can get started even if you aren't in top shape or the best of health. be called originated In this low-impact，slow-motion exercise，you go without pausing through a series of motions 3.___________ are named for animal actions—for example，“white crane spreads its wings”—or martial arts moves，such as “box both ears”. As you move，you breathe deeply and naturally，4.__________ (focus) your attention—as in some kinds of meditation—on your bodily sensations.Tai chi differs from other types of exercise 5._____ several respects.During the 6._________ (circle) movements，the muscles are relaxed rather than tensed，the joints are not fully extended or bent，and connective tissues are not stretched.Tai chi can be 7.________ (easy) adapted for anyone，from the most fit to people 8._________ (confine) to wheelchairs or recovering from surgery. that/which focusing in circular easily confined A growing body of carefully conducted research is building 9. ___ compelling case for tai chi as an adjunct to standard medical treatment for the prevention and rehabilitation of many conditions commonly associated with age.An adjunct therapy is one that's used together with primary medical treatments，either 10. ____________ (address) a disease itself or its primary symptoms，or，more generally，to improve a patient's functioning and quality of life. 语篇解读　本文是一篇说明文。文章主要介绍了太极拳的历史以及运动特点。 a to address 1．答案：be called 2．答案：originated 考查动词的时态。空处为定语从句的谓语动词，根据后文in the late Ming and early Qing dynasties可知，时态应用一般过去时。故填originated。 考查动词的语态。主语it与谓语动词call构成被动关系，且might后跟动词原形。故填be called。 3．答案：that/which 4．答案：focusing 此处focus与you为逻辑上的主动关系，故用动词-ing形式作状语。故填focusing。 考查定语从句。空处引导限制性定语从句，先行词为motions，关系词代替先行词在从句中作主语，用关系代词that/which。故填that/which。 5．答案：in 6．答案：circular 考查形容词。修饰名词movements用形容词circular，作定语。故填circular。 考查介词。in several respects表示“在几个方面”。故填in。 7．答案：easily 8．答案：confined 考查非谓语动词。此处confine与people构成逻辑上的被动关系，故用动词-ed形式作定语。故填confined。 考查副词。修饰动词adapted应用副词easily作状语，故填easily。 9．答案：a 10．答案：to address 考查非谓语动词。空处作目的状语，用动词不定式形式。故填to address。 考查冠词。此处case为泛指，且compelling是发音以辅音音素开头的单词，用不定冠词a。故填a。 返回 谢 谢 观 看 UNIT 2　HEALTHY LIFESTYLE 返回 $