Unit 4 Discovering Useful Structures 课件-2022-2023学年高中英语人教版（2019）必修第三册

Unit 4 SPACE EXPLORATION Discovering Useful Structures 1 输入文本内容输入文本内容 输入文本内容 To be, or not to be, that is a question. 2 非谓语动词 动词不定式 to do 过去分词 (done) 现在分词/动名词(doing ) 3 Functions of infinitives To live abroad is not easy. She planned to visit her parents next week. To see is to believe. The first person to come is Mr. Brown. He went to France to learn French. His father encouraged him to find a new job. 主语 宾语 表语 定语 宾补 状语 Step 1 Lead-in 不定式是____________的一种, 在句中不能独立作___________。可以作___________________________________________________。 非谓语 谓语 主语、宾语、表语、宾语补足语、定语、状语 主动语态 被动语态 意义 一般式 to do to be done 表示动作与谓语动作同时发生或发生在谓语动作之后 进行式 to be doing 表示谓语动作发生时, 不定式的动作正在进行 完成式 to have done to have been done 表示动作发生在谓语动作之前 完成进行式 to have been doing 表示动作发生在谓语动作之前且一直持续到谓语动作发生时仍在进行 基本结构: “ to + 动词原形”, to是不定式标志, 无意义, 有时不定式符号to可省略。 否定形式: not to + 动词原形 动词不定式的结构 =We must find a person who can do the homework. We must find a person to do the homework. 动词不定式作定语, 一般放在被修饰的名词、代词的后面, 多表示将来的动作, 可转化为定语从句。 动词不定式作定语 1. We must find a person to do the work. 2. There are lots of interesting things to see. 3. They got the order to leave the city. 动词不定式作定语通常放在名词、代词或不定代词的后面作后置定语。 动词不定式作定语一般与所修饰的名词构成主谓关系、动宾关系、或同位关系。 主谓关系 动宾关系 同位关系 一、不定式作定语的位置和关系 II Infinitive as attribute 11 1. She is the first to admit that much of his success is due to his good looks. 2. Tom is the only student to go to Shanghai in his class. 3. They take a lot of trouble to find the right person to do the job. 当名词被序数词,形容词最高级或 the only, the next, the last, the right修饰，且该名词是作定语的非谓语动词的执行者时，用不定式主动形式作定语。 二、不定式作定语（名词被特定词修饰） 三、不定式作定语与特定名词连用 1. He had no chance to take a bite of biscuit. 2. He made an attempt to be admitted to the big company. 3. A good teacher must have the ability to make himself understood. 4. They want to keep a promise to balance the federal budget by 2011. 5. We appreciate your eagerness to receive your device. 有些抽象名词常跟不定式作定语，如：dream, ambition, desire, determination, wish, decision, chance, promise, p