高中英语人教版 (2019)选择性必修 第三册Unit 2 Healthy Lifestyle课文配套ppt课件

这是一份高中英语人教版 (2019)选择性必修 第三册Unit 2 Healthy Lifestyle课文配套ppt课件
UNIT 2HEALTHY LIFESTYLETo learn infinitives used as subjectsTo use infinitives to complete the exercises to do和doing作主语的区别Look at the following sentences and pay attention to the italicised infinitives. Find more infinitives in the reading passage. In pairs, discuss their meanings and functions.1 To change bad habits is never easy.2 It took the surgeon (n.外科医生) three hours to finish my mother’s lung surgery (n. 外科手术).主语主语3 To join the People’s Liberation (n. 解放) Army , it is required for men to shave off (剃掉,刮掉)their beards.4 It was not polite to disturb(v. 打扰)your neighbours with loud music last night.主语主语目的状语More sentences in the reading passage:However, during this period, it can be easy for some of them to form bad habits.To prevent harmful habits like these from dominating a teenager’s life is essential.To change bad habits is never easy, even with many attempts.After all, it is not easy to break bad habits.主语主语主语主语 ① ② ③ ④ ⑤ ⑥ ⑦① ② ③④⑤⑥⑦动词不定式作主语常见的三种形式1. 不定式作主语通常位于句首，表示具体的某次动作，谓语动词用单数。 e.g. To see is to believe. 百闻不如一见。 To get up early is necessary. 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。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。2. 动词不定式与疑问词who, whom, whose, what, which, when, where, how等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。 Where to go has not been decided. 去哪儿还没有定下来。 【学以致用3】　完成句子①何时出发还没有告知。_______________ hasn't been told.②怎样找到那个走丢的孩子困惑着每一个人。_______________________ confused everyone.When to set offHow to find the lost child3. 当主语较长，谓语较短时，常用it作形式主语放在句首，而将真正的主语—不定式放到谓语的后面。e.g. It’s not easy to work out the problem. = To work out the problem is not easy.计算出这道题不容易。It is interesting to play with snow in winter. 冬季里玩雪是很有趣的。It is terrible to see the ship sinking into the sea. 目睹轮船沉入大海，真是太可怕了。it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.It takes/took/will take sb. some time/money to do sth.【温馨提示】【学以致用1】　翻译句子/完成句子①To be content with little is true happiness.__________。②学好英语是必要的。It's necessary ______________________．③ 照顾好老人是我们的义务。________________ to take good care of the old.知足常乐to learn English wellIt's our dutyIt is + adj. + for/of sb. to do sth.It is + n. + (for sb.) to do sth.常用于表示事物的特征，用于此句型的形容词有：easy, hard, difficult, possible, important, impossible, necessary, good, bad, exciting, interesting, surprising等。1) It is ＋ adj. ＋for sb. to do sth.sb. 是to do sth.的逻辑主语It is +adj.+ for/of sb. to do sth.e.g. It is necessary for young students to learn a foreign language. 对年轻的学生来说，学习一门外语是必要的。It is necessary for you to change your job. 你有必要换工作。It was impossible for them to complete the task in such a short time. 他们不可能在这么短的时间内完成这项任务。It’s important for us to keep the water clean. 保持水质清洁对我们来说是很重要的。常见的此类形容词有： kind, nice, wise, silly, polite, impolite, friendly, foolish, clever等。2) It is＋adj.＋of sb.＋to do sth. 形容词用来表示不定式的逻辑主语：人的性质、特征或品德e.g. It was silly of you to give up such a good chance！ 你放弃这么好的一个机会，真傻!It’s very kind of you to say so. 你这样说真是太好了。 It is friendly of the family to try to make me feel at home in their house. 这家人对我很友好，使我在他们家里感到宾至如归。It was rude of the boy to jump the queue!  那个男孩插队真是太无礼了!常见的名词有：pity, shame, pleasure, one’s duty, one’s job, fun, joy, good manners, bad manners等。It is + n. + (for sb.) to do sth.e.g. What a pity it is for you to have missed such a wonderful film. 真遗憾你错过了这样一个精彩的电影。   It must be great fun to fly to the moon in a spaceship. 乘宇宙飞船飞往月球一定很有趣。 It takes/took/will take sb. some time/money to do sth. 做某事花费某人多长时间(钱)e.g.It took me more than an hour to do my homework yesterday evening. 昨天晚上我做作业用了一个多小时。 It will take us a lot of money to buy that house. 买那套房子要花费我们很多钱。 【学以致用2】　完成句子①读这本书对我来说是一种乐趣。It's a pleasure ________________________．②承蒙您的邀请，真太好了。It's very nice _________________．③种这些花花费了我们两个小时的时间。It took us two hours ____________________．for me to read the bookof you to invite meto plant these flowers1.No_________is permitted here (smoke) lt is not very good for you_______so much (smoke).2.__________more is necessary (read). lt is quite necessary____________it again(read).3.____________a language in one month is impossible.(learn)一般来说，五、不定式和动名词作主语的区别①动名词doing作主语表示一种抽象的和泛指的动作， 不定式to do作主语则表示一次性的、具体的动作。 to smokesmoking Reading to readTo learn1.________(climb) mountains is interesting. ________(drive) a car during the rush hour must be tiring.2.________(teach) English is my job. ___________(teach) you English this term is my job.doing作主语时，通常用以表示一件已知的事或经验;to do通常用来表示一件未完成的事或目的。doing 作主语时强调的是做那件事的持续状态;to do作主语时主要表示现在或者将来要做的事情。②③ Climbing Driving To teach Teaching3. 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 for/of 引起的短语,构成__________。2. 不定式作主语时,可以用it作_______________.It is+adj.+for sb to do …… 5. It is+adj.+ of sb to do………(adj: kind, good, nice, wise, unwise, clever, silly, stupid, foolish, careless, rude, polite, naughty)（修饰人品形容词）（修饰物的形容词）1.单个不定式作主语，谓语动词_________单数形式主语不定式的复合结构语法总结(adj.: easy ,difficult, comfortable, pleasant, light , dangerous， tiresome, interesting , heavy, fit)随堂训练·巩固提升CⅠ.用所给单词的适当形式填空1．To make friends with them _____ (be) nice.2．When __________ (hold) the meeting has not been discussed yet.3．__________ (cross) the Atlantic by plane takes only a few hours.4．It made me happy __________ (find) Mary there.5．It is difficult for us __________ (finish) writing the composition in a quarter of an hour.6．It's kind of you __________ (help) me with my English.isto holdCrossingto findto finishto helpⅡ.完成句子1．出席这个会议对你来说很重要。It's very important __________________________．2．到那儿用了我们5个小时。It took us five hours __________．3．你把老师说的所有东西都写下来，真是太蠢了。It is stupid of __________________everything the teacher said.4．当你不用车的时候，锁车是有必要的。It's necessary ____________________ when you do not use it.5．如何提高产品质量对他来说可是个难题。_________________________ was a difficult problem to him.for you to attend the meetingto get thereyou to write downfor you to lock the carHow to improve the quality of productsJoin the words to make full sentences, and then join the sentences to make a paragraph. 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. 2. will take / nutrition specialist / a balanced diet menu / make / an hour / for youIt will take the nutrition 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.4. illegal / dangerous / take drugs5. harmful / skip breakfast / oftenIt is illegal and dangerous to take drugs.It is harmful to skip breakfast often.n. 毒品，药品v. 跳过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 some common sense. For example, it is harmful to skip breakfast too often. It is important to avoid passive cigarette smoking. And, of course, it is dangerous to take illegal drugs too.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 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.be in control ofbegin with, be in control of, make a choice, decide on, make up one’s mind2. 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.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 one’s mind4. 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.making choicesmade up my mindbegin with, be in control of, make a choice, decide on, make up one’s mind1. [2019·全国I卷] It is difficult _____________ (figure) out a global population of polar bears.2. [2020·江苏卷] The implication of these results is that to gain the greatest health benefits from exercise, it may be wise _____________ (skip) eating first.3. [2019·天津卷改编] Then we will know how important it is _____________ us to have meaning in our life.to figureto skipfor4. [2019·天津3月卷] Coming out of this experience, I realize it is OK _____________ (be) different from others.5. [2018·全国Ⅱ卷] Exercise energizes you, so ________ is more difficult to relax and have a peaceful sleep when you are very excited.to beit