高中英语Unit 2 Healthy Lifestyle教学设计

这是一份高中英语Unit 2 Healthy Lifestyle教学设计，共5页。
                   Unit 2 Discover useful structuresTeaching targets :To learn how to identify and analyse the functions of infinitive formsTo use infinitives to make full sentencesLook 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.主语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).主语目的状语  To join the People’s Liberation (n. 解放) Army , it is required for men to shave off (剃掉,刮掉)their beards.主语4 It was not polite to disturb(v. 打扰)your neighbours with loud music last night.主语More infinitives 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.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。 3.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。注意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.It is +adj.+ for/of 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。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。2) It is＋adj.＋of sb.＋to do sth. 形容词用来表示不定式的逻辑主语(sb.)的性质、特征或品德常见的此类形容词有： kind, nice, wise, silly, polite, impolite, friendly, foolish, clever等。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!It is + n. + (for sb.) to do sth.常见的名词有：pity, shame, pleasure, one’s duty, one’s job, fun, joy, good manners, bad manners等。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。  e.g 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 an hour for a nutrition specialist to make a balanced diet for you.3. useful / turn to / fitness consultant / for adviceIt is useful to turn to the fitness consultant for advice.4. illegal / dangerous / take drugsIt is dangerous to take illegal drugs.5. harmful / skip breakfast / oftenIt is harmful to skip breakfast (too) often.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.begin with,   be in control of,   make a choice, decide on,              make up one’s mind1. 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.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.HomeworkMake up two conversations about healthy lifestyle. Try to use infinitive forms functioning as the subject of a sentence in your conversations.