2020—2021学年人教版高一英语《grammar 定语从句之as》课件

1、定语从句基本概念定语从句：一个句子跟在一名词或代词(先行词)后进行修饰限定，就叫做定语从句。先行词：被修饰的名词或代词。关系词：关系代词：who,whom, whose, that, which，as。关系副词：when, where, why。关系词的作用：连接指代成分定语从句基本概念先行词在从句中作主语、定语、宾语、表语时，选择关系代词（who, whom, that, which, whose，as）。先行词在从句中作状语时，应选择关系副词（where 地点状语，when 时间状语，why 原因状语）。主语：who( 人) which( 物) that( 人/ 物)宾语：who/whom

2、( 人) which( 物) that( 人/ 物)定语：whose( 人，物)状语： where，when，why定语从句限制性定语从句和非限制性定语从句的区别1.作用：限-修饰，不可去掉 非限-补充说明，去掉不影响句意Wen Hua wont wear clothes that/which makes him different from other teachers.Wen Hua wont wear clothes, which makes him different from other teachers.2.形式：限-无逗号 非限-有逗号The book which you bor

3、rowed last week is really boring.This is an important present,which I received yesterday.非限制性定语从句4.关系词: that, why不可用于引导非限制性定语从句，而要用which代替that，for which代替why.改错：I have told them the reason ,why I didnt attend party. He didnt pass the exam, that disappointing his teacher. 非限制性定语从句3.先行词：限-单个名词或代词 非限-名

4、词、代词、句子This is the best novel that I have ever read.The novel is very interesting, which makes me very glad5.省略: 限-作宾语可省略 非限-不可省略This is a good film (which/that) I saw a few days ago. The summer holiday ,which we have been looking forward to, is drawing near. 6.翻译：限-翻译成先行词的定语，“的” 非限-通常翻译成主句的并列句Lucy

5、has an other brother who works in a hospital.Lucy has an other brother ,who works in a hospital.非限制性定语从句考点1：as用作关系代词，既可指人，也可指物。在定语从句中可作主语，宾语或表语，作宾语是不能省略。它常用在“such as”“the same as(that)” 等结构中，Such teachers as know Tom think him smart.I will buy the same dictionary as you have.易混点1: suchas 和suchthat的区

6、别1.He is such a clever boy _ everyone likes.2.He is such a clever boy _ everyone likes him.suchas 引导定语从句，从句中as 要做成分suchthat 引导状语从句，从句中that 不做成分As引导的定语从句易混点2: the sameas 和the samethat的区别(引导的都是定语从句)the same.that.结构中，that所指的事物通常就是前面已经提到的某个特定的事物the same.as.结构中, as所指的事物是与前面所提到的事物同类的另一个事物。I have bought th

7、e same book as you have.This is the same book that I bought last week.定语从句考点2 as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，意为“正如”。as引导非限制性定语从句，位置灵活可放在主句前面，中间，后面。as引导非限制性定语从句常用以下搭配as is well-known / as we all know/as is known to all 众所周知； as is said above/as mentioned above 正如上面所说；as might be imagined 正像所想象的那样

8、； as is reported 如报道所说；as has been pointed 如所指出的那样； as is expected 正如所料as you can see 正如你所看见的非限制性定语从句考点3 as/which引导非限制性定语从句时的区别1.先行词：as 的先行词一般为整个主句；而which 可指代整个主句，也可指代主句的一部分。She is always working hard, as we see.The book ,which I bought yesterday ,is very interesting. 2.从句位置： as引导的从句可置于句首，句中或句尾。而which引导的定语从句只能置于主句之后。As everyone can see she is very honest.She is honest, which everyone can see. 非限制性定语从句3.意义：as 引导非限制性定语从句