Unit 9 I like music that I can dance to.定语从句课件(共28张PPT) 2023-2024学年人教版英语九年级全一册

(共28张PPT)
定语从句
Contents
01
什么是定语 ？
02
什么是定语从句？
03
关系代词的用法
04
that 的特殊用法
什么是定语
dictionary
a thick dictionary
a useful thick dictionary
three useful thick dictionaries
定语是用来修饰、限定、说明名词或代词的品质与特征的。 主要有形容词，此外还有名词、代词、数词、介词短语、动词不定式(短语)、分词、定语从句或相当于形容词的词、短语或句子都可以作定语。 汉语中常用'……的'表示，定语的位置一般有两种:用在所修饰词之前的叫前置定语，用在所修饰词之后的叫后置定语，定语和中心语之间是修饰和被修饰、限制和被限制的关系。
a thick dictionary
a useful thick dictionary
three useful thick dictionaries
定语
什么是定语从句？
定语从句
跟在名词或代词后进行修饰说明的简单句；
被修饰的名词或代词称为先行词。
I like the food that you bought me.
从句作定语后置
先行词
关系词
先行词
关系词
定语从句
Mary is a girl who has long hair.
关系代词
关系副词
that, who, whom, whose, which
Where, when,why
定语从句的结构
关系词的
作用：
指代先行词，又在从句中充当相应的句子成分。
关系代词的用法
1.引导定语从句的词被称为关系词，其在定从中充当成分。
引导定从的关系代词:that / which / who / whom/whose
2.如何选择关系代词？
先行词 关系代词
指人 that /who/whom
指物 that/which
先行词 作主语 作宾语
指人 that /who that /who/whom
(可省略)
指物 that/which that/which
(可省略)
3.关系代词在从句中充当什么成分？
关系代词:
1. who指人,作主语或宾语 (作宾语可省略）
The man who I talked with is our teacher.
A person who steals things is called a thief.
2 . whom指人,作宾语 (作宾语可省略,
如介词提前则不能省)
The man (whom/who) I nodded to is Mr. Li.
The man to whom I nodded is Professor Li.
3.Whose 用来指人或物，(只用作定语, 若指 物,它还可以同of which互换）
They rushed over to help the man whose car had broken down.　 那人车坏了，大家都跑过去帮忙。
Please pass me the book whose (of which) cover is green.　
请递给我那本绿皮的书。
Harry is the boy whose mother is our Maths teacher.
I saw some trees whose leaves were black.
4. which 指物，作主语或宾语 (作宾语可省略)
eg: 1) These are the trees which were planted last year.
2) This recorder （which） he is using is made in Japan.
5. that 指人/物，作主语或宾语
(作宾语可省略）
eg: 1) A plane is a machine that can fly.
2) He is the man (that) I told you about.
3) The girl (that) we saw yesterday is Jim’s sister.
that 的特殊用法
下列情况只能用that
1.当先行词被序数词或形容词最高级修饰时。
eg. Tom is the cleverest boy that I have ever known.
2. 当先行词是指物的不定代词时。如：all, anything, something, nothing, none, the one, everything, little, few, much, any 。
eg. Here is something ( that) I will tell you.
3．先行词被the only，the very， the last等修饰时。
下列情况只能用that
eg. This is the only novel that you want to borrow．
4．先行词是或被all，no，some，any，little，much等修饰时。
eg. I‘ve written down all the things that the teacher doesn't allow us to do．
5．先行词是人和物的名词时,只能用that。
eg. He told us many interesting things and persons that we had never heard．
下列情况只能用that
6.主句的主语是疑问词who /which时 ,为了避免重复。
eg. Who is the girl that is crying？
eg. Which is the bike that you lost
下列情况只能用which
1. 前面有介词时，只能用which。
eg.This is the room in which he lives.
2. 先行词为that时,避免重复，用which.
eg. What’s that which is under the desk
练一练
1.That is one of the most interesting books are sold in the bookshop .
that
2.The first thing we should do is to get some food .
that
3.The man lives next to us is a policeman.
who
Thank you