(
课件网) UNIT1 ART 人教版(2019)选择性必修第三册 Discover useful structure Infinitives as the predicative（不定式做表语） Learning Objectives By the end of the class,you will learn the usage of infinitive as predicative. make conversations using the pattern. 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 ” way purpose aim What they attempted to do Read these sentences and fill in the blanks using the correct words from the text on pages 2 and 3. activity 1 what’s the function of the infinitive Look at the sentences above and fill in the table. 主 系 表 …the best way to understand Western art is to look… was …, Monet’s aim …, the purpose of Western art to teach… to convey… …(to) show… What they attempted to do was was 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。 Tip1. 不定式作表语时，句子主语大多是这些名词，advice, aim, ambition, desire, difficulty, duty, experience, hope, idea, intention, job, method, plan, principle,purpose, reason, wish等。 My ambition is to become a successful doctor and make a difference in people's lives. Their plan is to start a non-profit organization. activity 2 Discover and summary Tip2.作表语时，不定式多与系动词be连用。不定式前，还可添加疑问代词或疑问副词。 My only wish is to do what is best for you. 我唯一的愿望是作对你最有利的事。 Everyone is to struggle for one’s living. 每个人都要为自己的生存奋斗。 My main concern is how to get there on time. The traffic regulations are to be observed. 必须遵守交通规则。 Cars are not to park in front of the zoo. 动物园前面不准停放汽车。 Tip3.动词不定式作表语可用于被动语态，相当于 _____，具有情态意义。 can / could, should, must All he wanted was to be left alone. 他只想一个人待着。 The least I can expect is to have this day all to myself. 至少这一天我可以独享。 Tip4.主语包含定语从句且其先行词为代词_____或者主语被_____或形容词_____修饰时，其后可接“系动词+不定式”作句子的表语。 all only, first, one, least 最高级 Who is _____ the fire 谁应为这场大火承担责任？ The spare house is _____. 此房出租。 to blame for to let Tip5.某些动词不定式(短语)作表语时，需用主动形式表示被动。 *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. Tip6.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。 Ⅰ.单句语法填空 The most meaningful thing he wants to do is _____ (help) the poor. His plan is _____ (make) some changes in the teaching method. What ... ...
