Unit 2 Discover useful structures 课件-2022-2023学年高中英语人教版（2019）选择性必修第三册

Unit 2 Healthy Lifestyle Period 4 Discovering Useful Structures To-infinitive as the subject VCG211276707596 VCG211274413744 VCG211276707595 VCG211330955603 VCG211279253475 VCG211276707601 VCG211297317650 VCG211297317648 1 Learning Objects: 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 correctly. 2 (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，Monet’s aim was ____________(convey) the light and movement in the scene. (4) Her 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?” Review to look to teach to convey to put show 3 1. To change bad habits is never easy. 2. It took the surgeon three hours to finish my mother’s lung surgery. 3.To join the people’s Liberation Army, it is required for men to shave off their beards. 4. It was not polite to disturb your neighbors with loud music last night. Look at the following sentences and pay attention to the italicized infinitives, and tell their meanings and functions. ⁎The infinitive in each sentence functions as the subject of the sentence. Lead-in 4 Early to bed and ealy to rise makes a man healthy, wealthy and wise. Not to advance is to go back. To save time is to lengthen life. It is easy to open a shop, but hard to keep it always open. It’s hard to please all. Lead-in 5 1. 单个不定式作主语，通常位于句首，表示具体的某次动作，谓语动词用单数形式。 To get enough protein each day is beneficial to our health. To get good grades requires a lot of hard work. To learn a skill is very important for everyone in society.  动词不定式做主语 Presentation 6 2. 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 It is not right for