(
课件网) Period 2 Learning About Language The infinitive of the verb as the predicative Unit 1 Art 1.Enable the Students to master the usage of the infinitive of the verb as the predicative. 2.Enable the Students to use the relevant grammar flexibly and authentically in the real situation. Learning Aims 观察课文例句，总结to do sth. 的用法。 1. Perhaps the best way to understand Western art is to look at the development of Western painting over the centuries. 2.During the Middle Ages, the purpose of Western art was to teach people about Christianity. 3. In this work, Monet's aim was to convey the light and movement in the scene. 动词不定式在句子中作表语。 Lead in 基本构成 定义 To do sth 不定式 相当于名词、形容词、副词。充当主语、宾语、定语、表语、宾语补足语、状语。 动词不定式(短语)作表语的用法 1.主语是以aim, suggestion, duty, hope, idea, intention, plan, purpose, the way 等为中心的名词词组时,或者以what引导的名词性分句表示,一般用动词不定 式作表语说明主语的内容。 Our plan is to make better use of these materials. 我们的计划是更好地利用这些材料。 (2024·九省联考)Her job was to make sure the tanks were free of any items so that the trainers could train the dolphins to fetch specific items. 她的工作是确保水箱里没有任何物品，这样驯兽师就可以训练海豚获取特定的物品。 (2023·全国甲卷)And the only way for us to get into the habit of waiting is to practice. 我们要养成等待的习惯,唯一的方法就是练习。 2.表示目的。 The next step is to make sure that you know exactly what is required. 下一步你要真正弄清楚需要的是什么。 3.表示事态发展的结果、预期的结果及预言。 You must speak out，if we are to remain friends. 如果我们还想做朋友，你必须说出来。 We believe man is to live a better life in the future. 我们相信人类将来会过上更好的生活。 4.用于被动语态,相当于can/could, should, ought to, must,具有情态意义。 The regulations are to be observed.(must) 这些规定必须遵守。 You are to be rewarded.(should) 你会得到奖赏的。 5.表示“同意、安排、命令、决定、劝告、愿望、意愿、禁止”等。 They are to marry next week.他们将于下周结婚。(安排) You must be patient and persistent if you are to succeed. 如果你想成功，你必须有耐心和毅力。(愿望) You are to have a face-to-face talk with them.你要和他们面对面地谈谈。(劝告) Children are not to smoke. 儿童不允许吸烟。（禁止） 6.动词不定式(短语)作表语时,可用主动形式表示被动意义。 Who is to blame for the fire 这场火灾该怪谁？ The house is to let.这个房子出租。 动词不定式(短语)作表语省略to的情况 动词不定式(短语)作表语时，一般情况下不定式符号to不能省略,但在以下几种情况下可省略不定式符号to: 1. all作主句主语,其后的定语从句中含有实义动词do的某种形式时。 All we need to do is live each day with hope. 我们要做的就是带着希望度过每一天。 2.what引导的从句作主语,从句中含有实义动词do的某种形式时。 What I want to do is take a holiday right away.我想马上去度假。 3.(主句)主语被only,first,one,least或形容词最高级修饰,且其后作定语的从句或短语中含有实义动词do的某种形式时。 In the evening the only thing he did was ... ...
