Unit 5 Learning about language Discovering useful structures课件 -2022-2023学年高中英语人教版（2019）选择性必修第三册

Discovering Useful Structure 复习定语从句 1 Lead in Recall the attributive cluses that you have learned. Learning aims: To understand the concept of attributive cluses 2）To identify and review relative pronouns or adverbs Study and think independently 5') 1 ) Look at the following content. 2 ) To find out the concept of attributive cluses 3)To find out the key and difficult points. To find out the points you don’t understand. 定语从句以及相关术语 （ 1）定语从句：修饰某一名词或代词的从句叫定语从句。定语从句一般跟在它所修饰的名词之后。 （2）先行词：被定语从句所修饰的名词或代词叫先行词。 （3）关系词：引导定语从句的词叫关系词。 关系词有关系代词和关系副词。关系代词有that，which，who，whom，whose，as 等；关系副词有when，where，why 等。 （4）关系词在定语从句中有三大作用： 1）连接作用：连接主句与从句。 2）成分作用：在定语从句中充当一个成分。 3）替代作用：替代某一名词﹑代词或某一句话。 主语 宾语 定语 指人 who/that whom/who/that whose 指物 which/that which/that whose The boys who are playing football are from Class One. 正在踢足球的男孩们是一班的。 The man（whom/who/that） you met just now is my old friend. 你刚才遇见的那个人是我的老朋友。 The number of people that/who come to visit the city each year reaches one million. 每年来游览这座城市的人数达到一百万。 I once lived in the house whose windows were much larger than usual. 我曾经住在那个窗户比一般窗户大很多的房子里。 关系代词的基本用法 ① as 引导限制性定语从句 as 既可指人也可指物。在定语从句中可作主语或宾语。 它常用在such...as...，the same...as... 等结构中，as 不能省略。 Such reasons as we give can persuade him to give up this foolish plan.我们给出的这些理由可以说服他放弃这个愚蠢的计划。 ②as 引导非限制性定语从句 as引导非限制性定语从句，代替整个主句的内容。从句可放在主句前、主句后或主句中间。 as 引导非限制性定语从句常用的固定表达： as we all know 众所周知 as is well known 众所周知 as you see 如你所见 as we expect 正如我们预料的那样 as often happens 正如经常发生 as I can remember 正如我所记得的 as has been said before 如前所 as is/was expected 正如预料的那样 as can be seen 正如所见 as is often the case 情况常常是这样 As is often the case，girls like dolls while boys like guns. 女孩喜欢玩具娃娃而男孩喜欢枪，这是常见的情况。 as 与 which 引导的非限制性定语从句的区别 关系代词as 与which 引导的非限制性