Unit 1 Discover useful structures Infinitives (2) as the predicative 课件-2022-2023学年高中英语人教版（2019）选择性必修第三册

Unit 1 Art Grammar—Infinitives (2) as the predicative 不定式作表语的魅力 课堂导入 Read these sentences from the previous text and fill in the blanks using words from the text. Discuss with your partner the function of the italicized 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. way purpose Read these sentences from the previous text and fill in the blanks using words from the text. Discuss with your partner the function of the italicized infinitives. 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?” aim What they attempted to do to do to be done to have done 动词不定式形式有四种形式 to have been done 不定式一般式 不定式一般被动式 不定式完成式 不定式完成被动式 动词不定式形式的否定式是在前面加not构成。 语法讲解 本单元语法学习不定式to do作表语的用法 不定式相当于名词、形容词、副词。 动词不定式一般式形式to do可作主语，宾语，表语，定语，宾语补足语，状语，插入语等成分。 不定式to do作表语的位置 be (am/is/are/was/were) + 不定式 seem/appear/remain/get/prove/grow 等连系动词+ 不定式 The purpose of education is to develop a fine personality in children. 教育的目的是发展儿童良好的品格。 Children seem to become mature. 孩子们似乎变得成熟了。 不定式to do作表语的含义有哪些？ 1. 表解释说明。 My dream is to be a pilot. 我的理想是当一名飞行员。 2. 表示目的。 The next step is to understand exactly what conveys in the contemporary painting. 下一步要弄清楚这幅当代画所表达的确切内涵。 3. 用于第一人称疑问句，表示征求意见 What am I to do if I fail to find a good solution? 如果不能找到一个好的解决方案，我该怎么办呢？ 4. 表示事态发展的结果、预期的结果及预言。 If you are to live a long life，you must keep healthy. 如果你想长寿，你必须保持健康。 不定式to do作表语的含义有哪些？ 5. 表示“安排、命令、决定、劝告、意愿、禁止”等。 He is to head for Tibet next week. 下周他要动身到西藏去。（安排） You are to have a chat with them after school. 放学后你应该和他们聊天。（劝告） Boys are not to wear long hair. 男生不准留长发。（禁止） 6. 用于被动语态，相当于should，具有情态意义。 These paintings of great value are not to be sold. 这些很珍贵的油画不应该卖掉。 不定式to do作表语的含义有哪些？ 7. seem / appear / remain / ge