（2019版）人教版必修第三册英语Unit 1 Festivals and Celebrations Section B Discovering Useful Structures ppt课件.pptx

1、Unit 1 Festivals and CelebrationsDiscovering Useful Structures01 Leading-in01 Leading-in朗读活动1中的三个句子，在小组里逐句讨论斜体的动词-ing形式在句中的意思和语法功能。 These lanterns are amazing. During the Mid-Autumn Festival in China, families gather to admire the shining moon and enjoy delicious mooncakes. Families celebrating the

2、Lunar New Year can enjoy exciting dragon dances and carnivals together.0202 While-class While-class These lanterns are amazing.动词-ing形式作表语，它通常位于系动词后面，用以说明主语“是什么”“或“怎么样”During the Mid-Autumn Festival in China, families gather to admire the shining moon and enjoy delicious mooncakes.动词-ing形式作定语，它通常用来修

3、饰、限定、说明名词或代词的品质与特征。用于名词前的称为前置定语，用于名词后的称为后置定语。Families celebrating the Lunar New Year can enjoy exciting dragon dances and carnivals together.动词-ing形式作后置定语，用于修饰前面的名词。小组合作：在本单元学过的内容中找出包含动词-ing形式用作定语和表语的句子。并做出分析。I think the Rio Carnival would be the most exciting.（表语）Itll be too tiring to walk or dance

4、 for a long time in those shoes.（表语）Another example is Halloween，which slowly became an exciting festival for children, in spite of its religious origins.（定语）The first week was a little confusing.（表语）阅读网络跟帖，并回答问题：What are they discussing in the forum？（Which festival is the best？）How are the messages

5、 arranged？（By time and date.）What festivals are mentioned in the discussion？（Rio Carnival，the Spring Festival, Thanksgiving Day，and Christmas.）03 After-class03 After-class看图片，快速浏览活动3的短文，理解文段大意，回答下列问题：Where are those people？What are they doing？Why are they so excited？小组讨论：Do you like La Tomatina？Why

6、or why not？04 Summary 04 Summary 动词动词-ing形式作定语和表语形式作定语和表语动词ing形式分为动名词和现在分词两类。动名词兼有动词和名词的特征和作用，在句中作主语、宾语、表语和定语；现在分词兼有动词、形容词和副词的特征，在句中作定语、表语、补足语和状语。1.动词-ing形式作定语动名词和现在分词都可以作定语，但有所区别。a.动名词作定语表示被修饰词的某种性能或用途，相当于名词+for +doing sth.b.现在分词作定语时，它和被修饰词之间有逻辑上的主动关系，表示所修饰词正在进行的动作相当于一个定语从句。语法语法形式形式关系关系过去分词作过去分词作定语

7、定语done表示被动、完成现在分词作现在分词作定语定语doing表示主动、动作正在进行being done表示被动、动作正在进行不定式作定不定式作定语语to do表示主动、动作将要发生to be done 表示被动、动作将要发生c.过去分词、现在分词以及不定式作定语时的区别2.动词ing形式作表语作表语的动词-ing形式包括现在分词和动名词。a.现在分词作表语，往往具有形容词的性质说明主语的性质、特征等。b.动名词作表语多说明主语的内容，表示笼统的、抽象的概念。主语和表语可以换位。c.与现在事实相反：一般过去时（be动词用were）d.与过去事实相反：过去完成时(had done)e.与将来事实相反：过去将来时(would/could/might do)