Unit 1 Discovering Useful Structures 教案-2022-2023学年高中英语人教版（2019）选择性必修第三册

                     Unit 1 learning about language 教案 Teaching aims:To learn the usage of infinitive as predicative.To make conversations using the pattern. Read these sentences and fill in the blanks using the correct words from the text on pages 2 and 3. Discuss with your partner the function of the italicised infinitives.1 Perhaps the best ______ to understand Western art is to look at the development of Western painting over the centuries. 2 During the Middle Ages, the _________ of Western art was to teach people about Christianity.3 In this work, Monet's _____ was to convey the light and movement in the scene…4 ________________________ was no longer show reality, but instead to ask the question, “What is art?”不定式作表语动词不定式 (Infinitives) 是重要的非谓语动词形式之一，由“(to) +动词原形”构成。动词不定式有动词特征，可与其逻辑主语、宾语、状语等一起构成不定式短语。动词不定式在句中的位置灵活、句法功能丰富，可充当谓语以外的几乎所有句子成分。除学过的不定式作宾语、宾补、定语、状语等用法外，不定式在句中还可以用作表语。作表语时，不定式多与系动词be连用。1. 当句子的主语是不定式时，系动词后可接不定式作表语，用于解释主语所描述的行为或说明该行为带来的结果。     e.g.  To go there at this hour was to risk one’s life.             To ask him such questions is to irritate him.    类似用法还包括一些格言警句。    e.g. To see is to believe.           To hear is to obey.2. 当不定式作表语时，能够担当句子主语的名词比较有限，它们大多用于表示某种情形或状况，包括advice, aim, ambition, custom, business, desire, difficulty, duty, experience, habit, happiness, hope, idea, intention, job, method, plan, principle, problem, purpose, reason, risk, role, task, thing, wish等。e.g.  My ambition is to become a scientist.        His habit is to get up early. 有时，根据表达的需要，在作表语的不定式前，还可添加疑问代词或疑问副词，包括what, who, how, when, where等。e.g. The problem was how to begin.       My main concern is how to get there on time.3. 当主语包含定语从句且其先行词为代词all或形容词最高级形式the least, the most时，其后可接“系动词+不定式”作动词的表语。e.g. All he wanted was to be left alone.       The least I can expect is to have this day all to myself.4. 当不定式作表语时，句子的主语还可以是what引导的主语从句。    e.g. What I want to do now is (to) have a rest.【注意】不定式在作表语时，主语中有do的某种形式时，作表语的不定式可以省略to。e.g. What you should do next is (to) help him with his English.       The only thing he can do now is (to) give up the plan. 动词-ing形式和不定式同样都可以充当表语，区别：不定式表达是具体或是将来发生的动作，而动词-ing形式则表示抽象的一般行为。e.g.  His job is delivering the letters to their destinations.        My job is to look after the sister when Mom is cooking.Match the sentence halves and underline the nouns or clauses used as the subject in each sentence.                        Choose five sentences from Activity 2, and make sentences according to yourself.Useful structuresMake conversations using the following questions and sentence patterns.1 What's your biggest dream/ambition in life?2 How are you going to make your dream come true?3 How are you going to achieve your goal?4 Do you have any plans?5 What might be difficult for you?6 How are you going to deal with…?My biggest dream/ambition in life is to…I think all I have to do is…My plan is to…I think one of the hardest things might be…I guess the best way to ... is … A: What’s your biggest ambition in life?B: My biggest ambition in life is to run an international marathon in Beijing.A: Wow, that sounds great! How are you going to make your dream come true?B: I should practise, practise, practise and never give up!A: How are you going to achieve your goal? Do you have any plans?B: Yes, my plan is to run my first marathon in two years’ time. I think all I have to do is start running shorter races, and then get used to longer and longer races.A: What might be difficult for you?B: I think one of the hardest things might be training my body and mind to endure such a long race.A: How are you going to deal with that?B: I guess the best way to deal with that is to train slowly but with great focus, get a lot of support from friends and family, always be positive, and keep my long-term goal in mind.Exercises用括号内单词的正确形式填空。1. Our plan is __________ (set) up another middle school for the children.2. His ambition is __________ (become) a successful painter.3. The duty of a doctor is __________ (treat) the sick, cure the injured, and save lives.4. Her wish is __________ (improve) the working condition.5. His purpose was ____________ (discover) how long these guests intended to stay. 6. My original intention was __________ (devote) three months to the project.7. My first real task was __________ (prepare) for the meeting.8. I know it's unrealistic, but my hope is __________ (win) a scholarship.HomeworkRead the text again and list all sentences of infinitive as predicative.