Unit 1 Discover useful structures 课件-2023-2024学年高中英语人教版（2019）选择性必修第二册

Discovering useful structures UNIT 1 ART 动词不定式作主语和表语 They must learn to recognise bad habits early and make appropriate changes. We make a choice to do something, and then we repeat it over and over again. The reward makes us much more likely to continue the habit cycle. To facilitate a positive change in our bad habits, we must first examine our bad habit cycles and then try to adapt them. For example, when we come to an escalator (cue), our normal routine is to ride it. To reach the goal of change, a person must show some discipline and repeatedly take many small steps. object 宾语 attribute 定语 complement 补足语 adverbial 状语 object 宾语 predicative 表语 adverbial 状语 Tip 1: 动词不定式可以在句中作______、______、______、______、______、________的成分。 主语 宾语 表语 定语 状语 补足语 Read these sentences and fill in the blanks using the correct words. Perhaps the best _____ to understand Western art is to look at the development of Western painting over the centuries. During the Middle Ages, the _______ of Western art was to teach people about Christianity. In this work, Monet’s ____ was to convey the light and movement in the scene ... ___________________________ was no longer show reality, but instead to ask the question, “What is art?” way purpose aim What they attempted to do 动词不定式 在句中作表语 1. 结构 动词不定式可以放在 be和 become, sound, taste 等__________后 面作表语，由“(to) +动词原形”构成。 2. 时态 动词不定式作表语时，如果不定式和逻辑主语之间是主动关系应使用__________如果是被动关系应该使用___________。 例1：His goal is _____________ (be) a volunteer at the local hospital in the coming holidays. 例2：His goal is ______________(admit) into Peking University this summer. : 动词不定式 系动词 to become to be admitted to do to be done Summarizing “不定式作表语” 的实质是：be是系动词，be 前的主语和be后的表语是同位概念，不定式作表语对主语的内容做具体说明作用，主语往往是表示“目的，目标，想法，愿望，任务，责任等”的名词，如：_______________________________ _____________________________________________________________________________还可以由what 或者all引导的名词性从句等。 intention, plan, purpose, aim ,duty，hope，idea，concern，job，pla