高中英语语法——限制性定语从句和非限制性定语从句课件(共29张PPT)
代词
先行词也可以是 句子
The novel is very interesting, which made me very glad.
总结2：
限制性定从的先行词是名词或代词。
非限制性定从先行词可以是名词或代
词，也可以是前面整个句子。
区别3：引导词的区别
× I like the school, wthhiacth is named
hard to understand.
late again.
非限制性定语从句中的关系词
指代人 who, whom, t×hat 关
指代事物 which, that
系
所属关系 whose, of which
代 词
指地点 where 关
指时间 when
系 副
指原因 w×hy 词
Байду номын сангаас
形式上 意义上 作用上
翻译时 关系词
限制性定语从句
非限制性定语从句
修饰限制，译为
“的”，不能去掉 从句
补充说明， 译成并列句， 即使删去从 句，主句意
思不改变
I like the girl, who is making a pose.
He has a son who wants to be a singer.
不能去 掉
He wants to be a singer.
CCCaann yyyoooWuuufhfifniainndtddatrhttehehteeahnaertetertelcradeibtdiwuveoetnirtvwd(e先so?cr行ldas词u?s)?e?
• You're the one who set it up. • I'm the one whose feeling lost right now. • Now you want me to forget every little thing
2. The sun heats the earth，which
makes it possible to grow crops.
Translate the lyrics into English
• 有一个美丽的小女孩，她的名字叫做小薇。
• There is a pretty girl whose name is
I won't fo我rg不et 会the忘w记ay你(t亲ha吻t) y的ou方're式kissing The feeling's so strong were lasting for so long But I'm not但th我e m却a不n (是wh你om心)中yo想ur念he的ar人t is missing That's why you go away, I know
物
which that object（宾语）
人
物
whose attribute（定语）
关系词 关系 where 副词 when
why
指代 地点 时间 原因
充当成分 状语
非限制性定语从句 与
限制性定语从句
区别1：从句与主句的关系
I like the girl who is making a pose.
Xiaowei. • 遥远的东方有一条江，它的名字就叫长江。 • In the distant East, there is a river
whose name is Yangtze River.
• 你说我像云，捉摸不定。
• You said I was like a cloud， which is
不用逗号
用逗号
去掉后句意不完整 去掉后，句意完整
修饰限制
只可修饰先行词
译为“…的”
作宾语时可以省略
补充说明
可修饰先行词或主句
可译为并列句
不可省略且不能用 that , why 引导
1. Apples, that are good at people’s health, which
should be eaten every day.
Dongyuan High School.
× My mother is the woman, wthhaot is
good at cooking.
I had told my boss the reason, for which I was late again.
先行词指原因
总结3: 引导词的区别
非限制性定语从句 与
限制性定语从句
Complete the following lyrics
That's Why You Go Away
Baby, won't you tell me why there is sadness in your eyes I don't wanna say goodbye to you Love is one big illusion I should try to forget but there is something left in my head
☆ 被定语从句限定的词是_“_先_行__词__”，引导定语从 句的词叫做“_关__系__代_词__”或 “_关__系__副__词__”。
先行词
关系词
function (句子成分)
人
that who
subject（主语）
that who whom object（宾语）
which that subject（主语）
(that) you said. • I won't forget the way (that) you're kissing. • But I'm not the man (whom) your heart is
missing.
语法讲解
定语从句（the attributive clause）
在复合句中，修饰名__词___或__代_词___的是定语从句
interesting. • The novel is very interesting, which made me
very glad. • I like the school, which is named Dongyuan High
School. • My mother is the woman, who is good at cooking. • I had told my boss the reason, for which I was
能去掉 He has a son , who is an actor.
We all admire the man
who wears the white suit.
不能去 掉
I admire the man, who wears a
big smile.
能去掉
总结1：
限制性定从对主句起__修_饰__限__制__作用， 如去掉，意思__不____完整。
非限制性定从对主句作___补__充__说__明__， _____可__以__去_掉____，去掉后主句意思仍然 完整。
非限制性定语从句 与
限制性定语从句
区别2：先行词的区别
先行词是名词或 代词
This is the best novel that I have ever read.
The novel, which I read last night, is ve先ry行i词nt是e名re词s或ting.
You're the one who set it up Now you're the one to make it stop I'm我th就e o是ne那w个ho现se在fe迷eli失ng了lo方st 向rig的ht人now Now you want现m在e t你o f要or我ge忘t ev却er你y l所itt说le 的thi一ng切(that) you said but there is something left in my head
• 在非限定性定语从句中，不能用关系副词why 和关系代词that。要用for which代替why.
• I like the girl, who is making a pose. • He has a son, who is an actor. • I admire the man , who wears a big smile. • The novel, which I read last night, is very
先行词也可以是 句子
The novel is very interesting, which made me very glad.
总结2：
限制性定从的先行词是名词或代词。
非限制性定从先行词可以是名词或代
词，也可以是前面整个句子。
区别3：引导词的区别
× I like the school, wthhiacth is named
hard to understand.
late again.
非限制性定语从句中的关系词
指代人 who, whom, t×hat 关
指代事物 which, that
系
所属关系 whose, of which
代 词
指地点 where 关
指时间 when
系 副
指原因 w×hy 词
Байду номын сангаас
形式上 意义上 作用上
翻译时 关系词
限制性定语从句
非限制性定语从句
修饰限制，译为
“的”，不能去掉 从句
补充说明， 译成并列句， 即使删去从 句，主句意
思不改变
I like the girl, who is making a pose.
He has a son who wants to be a singer.
不能去 掉
He wants to be a singer.
CCCaann yyyoooWuuufhfifniainndtddatrhttehehteeahnaertetertelcradeibtdiwuveoetnirtvwd(e先so?cr行ldas词u?s)?e?
• You're the one who set it up. • I'm the one whose feeling lost right now. • Now you want me to forget every little thing
2. The sun heats the earth，which
makes it possible to grow crops.
Translate the lyrics into English
• 有一个美丽的小女孩，她的名字叫做小薇。
• There is a pretty girl whose name is
I won't fo我rg不et 会the忘w记ay你(t亲ha吻t) y的ou方're式kissing The feeling's so strong were lasting for so long But I'm not但th我e m却a不n (是wh你om心)中yo想ur念he的ar人t is missing That's why you go away, I know
物
which that object（宾语）
人
物
whose attribute（定语）
关系词 关系 where 副词 when
why
指代 地点 时间 原因
充当成分 状语
非限制性定语从句 与
限制性定语从句
区别1：从句与主句的关系
I like the girl who is making a pose.
Xiaowei. • 遥远的东方有一条江，它的名字就叫长江。 • In the distant East, there is a river
whose name is Yangtze River.
• 你说我像云，捉摸不定。
• You said I was like a cloud， which is
不用逗号
用逗号
去掉后句意不完整 去掉后，句意完整
修饰限制
只可修饰先行词
译为“…的”
作宾语时可以省略
补充说明
可修饰先行词或主句
可译为并列句
不可省略且不能用 that , why 引导
1. Apples, that are good at people’s health, which
should be eaten every day.
Dongyuan High School.
× My mother is the woman, wthhaot is
good at cooking.
I had told my boss the reason, for which I was late again.
先行词指原因
总结3: 引导词的区别
非限制性定语从句 与
限制性定语从句
Complete the following lyrics
That's Why You Go Away
Baby, won't you tell me why there is sadness in your eyes I don't wanna say goodbye to you Love is one big illusion I should try to forget but there is something left in my head
☆ 被定语从句限定的词是_“_先_行__词__”，引导定语从 句的词叫做“_关__系__代_词__”或 “_关__系__副__词__”。
先行词
关系词
function (句子成分)
人
that who
subject（主语）
that who whom object（宾语）
which that subject（主语）
(that) you said. • I won't forget the way (that) you're kissing. • But I'm not the man (whom) your heart is
missing.
语法讲解
定语从句（the attributive clause）
在复合句中，修饰名__词___或__代_词___的是定语从句
interesting. • The novel is very interesting, which made me
very glad. • I like the school, which is named Dongyuan High
School. • My mother is the woman, who is good at cooking. • I had told my boss the reason, for which I was
能去掉 He has a son , who is an actor.
We all admire the man
who wears the white suit.
不能去 掉
I admire the man, who wears a
big smile.
能去掉
总结1：
限制性定从对主句起__修_饰__限__制__作用， 如去掉，意思__不____完整。
非限制性定从对主句作___补__充__说__明__， _____可__以__去_掉____，去掉后主句意思仍然 完整。
非限制性定语从句 与
限制性定语从句
区别2：先行词的区别
先行词是名词或 代词
This is the best novel that I have ever read.
The novel, which I read last night, is ve先ry行i词nt是e名re词s或ting.
You're the one who set it up Now you're the one to make it stop I'm我th就e o是ne那w个ho现se在fe迷eli失ng了lo方st 向rig的ht人now Now you want现m在e t你o f要or我ge忘t ev却er你y l所itt说le 的thi一ng切(that) you said but there is something left in my head
• 在非限定性定语从句中，不能用关系副词why 和关系代词that。要用for which代替why.
• I like the girl, who is making a pose. • He has a son, who is an actor. • I admire the man , who wears a big smile. • The novel, which I read last night, is very
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高中英语语法：限制性定语从句和非限制性定语从句(32张PPT)(共32张PPT)
You're the one who set it up Now you're the one to make it stop 我就是那个现在迷失了方向的人 I'm the one whose feeling lost right now Now you want现在你要我忘却你所说的一切 me to forget every little thing (that) you said but there is something left in my head
区别2：先行词的区别
非限制性定语从句 与 限制性定语从句
This is the best novel that I have ever read.
先行词是名词或 代词
The novel, which I read last night, is very interesting.
先行词是名词或 代词
不能去 掉
I admire the man, who wears a
big smile.
能去掉
总结1：
修饰限制 不
限制性定从对主句起_________作用， 补充说明 如去掉，意思______完整。 可以去掉
非限制性定从对主句作___________， ______________，去掉后主句意思 仍然完整。
先行词也可以是 句子
The novel is very interesting, which made me very glad.
总结2： 限制性定从的先行词是名词或代 词。
非限制性定从先行词可以是名词 或代词，也可以是前面整个句子。
区别3：引导词的区别
I like the school, that is named Dongyuan High School. which
高中限制性和非限制性定语从句经典课件
他有两个妹妹在汉阴工作。 （two）He has two sisters, who are working in Han Yin. (He has only two sisters.)
他有两个妹妹, 她们在汉阴工作。
Discovering the differences
以下两个句子之间只有一个逗号之差，意义大相径庭。
Senior English Cultural relics
Book 2 Unit 1
Grammar
The Restrictive and
Non-Restrictive
Attributive Clause
限制性定语从句和非限制性定语从句
that which who whom whose
when where why prep+which
（1）My brother will wear no shoes which will make him different from others. (言外之意:和别人穿一样的)
我弟弟不会穿一些使他显得与众不同的鞋子。
（2） My brother will wear no shoes, which will make him different from others. (言外之意:不穿鞋子)
我弟弟不穿鞋子, 这会使他显得与众不同。
非限制性定语从句
He has two sisters, (who are working in Han Yin).
构成：
先行词
+,(逗号)+
关系词
指代作用
指人 指物 在定语从句中的作用
who √
whom √
主语
宾语
宾语
他有两个妹妹, 她们在汉阴工作。
Discovering the differences
以下两个句子之间只有一个逗号之差，意义大相径庭。
Senior English Cultural relics
Book 2 Unit 1
Grammar
The Restrictive and
Non-Restrictive
Attributive Clause
限制性定语从句和非限制性定语从句
that which who whom whose
when where why prep+which
（1）My brother will wear no shoes which will make him different from others. (言外之意:和别人穿一样的)
我弟弟不会穿一些使他显得与众不同的鞋子。
（2） My brother will wear no shoes, which will make him different from others. (言外之意:不穿鞋子)
我弟弟不穿鞋子, 这会使他显得与众不同。
非限制性定语从句
He has two sisters, (who are working in Han Yin).
构成：
先行词
+,(逗号)+
关系词
指代作用
指人 指物 在定语从句中的作用
who √
whom √
主语
宾语
宾语
限制性定语从句和非限制性定语从句区别课件共23张PPT
1) information to identify the person(s) / object(s) ? (defining clause)
2) extra information about a person or a thing, which can be left out? (nondefining clause)
限制性定语从句和非限制性定语从句:
限制性定语从句: 所谓限制性定语从句就是先行词在意义 上不可缺少定语, 如果去掉, 主句就失 去意义或意义不完整。这种从句和先行 词的关系十分密切, 写时不用逗号和主 句分开。
Do you remember the girl who taught us English？ 你还记得教我们英语的那个女孩吗？ (如果把从句部分去掉, 整个句子的含 义就变了。)
2. She heard a terrible noise, which
brought her heart into her mouth. 她听到一个可怕的声音，这让她把心 都提到嗓子眼了。
四、非限制性定语从句由“介词+关系代词” 引导时，其中的关系代词不能用as。 1. He bought the car for more than $20,000,
attend the meeting. 我告诉了他们我不去开会的理由。 (限制性定语从句“the reason why ...” 是 常见搭配。)
三、非限制性定语从句置于句首时，不 能用which引导。关系代词as引导非限制 性定语从句位置比较灵活，可以放主句 前，也可以放主句后。
1. As I expected, he didn't believe me. 正如我所预料的，他不相信我。
All the magazines here which have beautiful pictures in them were written by him. 里面有漂亮图画的那些杂志是他写的。 （杂志有带图画和不带图画两类）
2) extra information about a person or a thing, which can be left out? (nondefining clause)
限制性定语从句和非限制性定语从句:
限制性定语从句: 所谓限制性定语从句就是先行词在意义 上不可缺少定语, 如果去掉, 主句就失 去意义或意义不完整。这种从句和先行 词的关系十分密切, 写时不用逗号和主 句分开。
Do you remember the girl who taught us English？ 你还记得教我们英语的那个女孩吗？ (如果把从句部分去掉, 整个句子的含 义就变了。)
2. She heard a terrible noise, which
brought her heart into her mouth. 她听到一个可怕的声音，这让她把心 都提到嗓子眼了。
四、非限制性定语从句由“介词+关系代词” 引导时，其中的关系代词不能用as。 1. He bought the car for more than $20,000,
attend the meeting. 我告诉了他们我不去开会的理由。 (限制性定语从句“the reason why ...” 是 常见搭配。)
三、非限制性定语从句置于句首时，不 能用which引导。关系代词as引导非限制 性定语从句位置比较灵活，可以放主句 前，也可以放主句后。
1. As I expected, he didn't believe me. 正如我所预料的，他不相信我。
All the magazines here which have beautiful pictures in them were written by him. 里面有漂亮图画的那些杂志是他写的。 （杂志有带图画和不带图画两类）
限定性定语从句与非限定性定语从句的区别-全ppt课件.ppt
______ they lend you an umbrella in fair weather and ask for it back when it begins to rain. A. when B. that C. where D. there
A .含有be 动词 He failed the exam, as is natural.
B.实意动词的被动形式
As is reported, the fire caused a great loss.
C. 感官动词和意识类动词 如：see, hear, notice, know, learn,realize 等
and flo_ww_h_e_yr_s；ha作d地be点en状p语la时n用ted_w.__h_e_r_e_； 9. This is作th时e 间isl状an语d时_w_,h_用_er__we__h_Ie_ln_i_v。ed for two
years.
10. 2001-2005 are the years _w_h_e_n_ I studied in the university.
6. Is it the reason _w__h_y_ you were late? 7. October 1st is the date _w_h_e_n_ China
celebrat关es系its副N词a在tio定na语l 从Da句y.中代替先行 8. We wal词ke做d状in语a。ga先rd行e词n _作w_原_h_e因_re_状m语a时ny用trees
A. for which B. with which
C. of which
D. to which
7. (2011江苏卷) Between the two parts of the concert is an interval, _______ the audience can buy ice-cream.
A .含有be 动词 He failed the exam, as is natural.
B.实意动词的被动形式
As is reported, the fire caused a great loss.
C. 感官动词和意识类动词 如：see, hear, notice, know, learn,realize 等
and flo_ww_h_e_yr_s；ha作d地be点en状p语la时n用ted_w.__h_e_r_e_； 9. This is作th时e 间isl状an语d时_w_,h_用_er__we__h_Ie_ln_i_v。ed for two
years.
10. 2001-2005 are the years _w_h_e_n_ I studied in the university.
6. Is it the reason _w__h_y_ you were late? 7. October 1st is the date _w_h_e_n_ China
celebrat关es系its副N词a在tio定na语l 从Da句y.中代替先行 8. We wal词ke做d状in语a。ga先rd行e词n _作w_原_h_e因_re_状m语a时ny用trees
A. for which B. with which
C. of which
D. to which
7. (2011江苏卷) Between the two parts of the concert is an interval, _______ the audience can buy ice-cream.
限制性定语从句和非限制性定语从句.pptx
worked 20 years ago.
A、that B、when C、which
解析：题中的the school是定语
从句的先行词。in +which=
where , 因此选D.
B 试比较： This school is ____
my father worked 20 years
D、where ago.
D 4、I，______ you good friend, will
try my best to help you out. A、who is B、what is C、what am D、who am
第19页/共30页
C 5、This is the only thing _____ I can
do now. A、what B、which C、that D、all
从句we visited last year 中visit是个及物动词，后
C、what
接宾语，因此选A.
D、the one
第13页/共30页
6、The text is one of the most interesting
B stories_______learnt in the past
three days. A、that have B、that have been
A、which 解析： 定语从句中的先
B、what 行词为all, none等词时，
C、that
关系代词必须用that,而
D、whether 不是which. 故选C。
第9页/共30页
D 2、Is this factory ____ we visited last
week.
解析： this factory容易被学生错
定语从句(2)限制性和非限制性定语从句+课件-2025届高三英语一轮复习
限制性和非限制性定语从句区别
(3)翻译不同
含有限制性定语从句的句子一般先译从句,后译先行词,即把从句放在先行词前,译为“……的+先行 词”。含有非限制性定语从句的句子一般先译主句,后译从句,译成两个分句。
He is the man who lives next to me.他就是住在我隔壁的那个人。 He is a warm-hearted man , who lives next to me.他是个热心肠的人,住在我的隔壁。
用正确的关系词填空：
小试牛刀
1.It is a truly delightful place,________looks the same as how it looked 100 years ago
with its winding streets and pretty cottages.
2.This woman has set a good example to her son, ________is a really lucky guy.
定语从句2
限制性和非限制性定语从句
第1章 限制性定语从句 非限制性定语从句
定语从句分类
1 限制性定 语从句
2 非限制性 定语从句
限制性定语从句
比较这两个句子： She despised people.(她看不起人) She despised people who flattered her.(她看不起吹捧她的人)
通过以上句子，你能总结出这两 类定语从句的用法区别吗？
限制性和非限制性定语从句区别
(1)形式不同
限制性定语从句与主句之间无逗号隔开;非限制性定语从句与主句之间通常有逗号隔开。 This is the best novel that I have ever read.这是我读过的最好的小说。 I read a novel last night, which is very interesting.我昨天晚上读了一本小说,它非常有趣。
高中英语语法-限定性和非限定性定语从句(共32张PPT)
定语从句的分类
课程大纲
从句和定语从句 定语从句的由来 定语从句的基本概念 定语从句的分类
• 限定性定语从句 • 非限定性定语从句 • 分割性定语从句
定语和定语从句
• a phone • a cell phone • a phone which is produced by Apple Computer Inc.
• I admire the man.
• I admire the man , who played Kangxi Emperor in the famous TV series, Kangxi Empire. • 我喜欢那个男人，他在著名的电视剧《康熙帝国 》中扮演康熙皇帝。 • 补充说明； 翻译成另一个分句；
巩固练习
• 判断下列句子是限定or非限定： • 1. The Mississipi River which flows smoothly is the major commercial river in the USA.
• The Mississipi River , which flows smoothly , the major commercial river in the USA.
巩固练习
翻译1： • （2008上海高考）我对学生所谈的电子产品一无 所知，我发现自己落伍了。(ignorant) • I found myself out of date, for I ma ignorant of the electronic products which the students are talking about.
• Mr. Black responded to my letter instantly , which I appreciated very much.
课程大纲
从句和定语从句 定语从句的由来 定语从句的基本概念 定语从句的分类
• 限定性定语从句 • 非限定性定语从句 • 分割性定语从句
定语和定语从句
• a phone • a cell phone • a phone which is produced by Apple Computer Inc.
• I admire the man.
• I admire the man , who played Kangxi Emperor in the famous TV series, Kangxi Empire. • 我喜欢那个男人，他在著名的电视剧《康熙帝国 》中扮演康熙皇帝。 • 补充说明； 翻译成另一个分句；
巩固练习
• 判断下列句子是限定or非限定： • 1. The Mississipi River which flows smoothly is the major commercial river in the USA.
• The Mississipi River , which flows smoothly , the major commercial river in the USA.
巩固练习
翻译1： • （2008上海高考）我对学生所谈的电子产品一无 所知，我发现自己落伍了。(ignorant) • I found myself out of date, for I ma ignorant of the electronic products which the students are talking about.
• Mr. Black responded to my letter instantly , which I appreciated very much.
限制性和非限制性定语从句区别PPT课件
非限制性定语从句用于对名词 或代词进行补充说明，提供额 外信息。
通常用逗号隔开，放在句子中 间或末尾。
可省略，不影响句子的完整性 或意义。
两者在功能上的差异
限制性定语从句的主要功能是限定名词或代词的范围，帮助读者更好地理解句子所 描述的对象。
非限制性定语从句的主要功能是补充说明，为读者提供更多的背景信息或细节描述。
例如：The woman who is talking to my mother is a teacher.（与我妈交谈的女人是一 位老师。）
什么是非限制性定语从句
非限制性定语从句对所修饰的名 词提供附加说明，如果去掉定语
从句，主句的意思仍然完整。
非限制性定语从句与主句之间通 常用逗号隔开，口语中也不例外。
对比分析实例中的差异
在限制性定语从句中，从句与主句的关系更加紧密，从句是 对名词的必要修饰，去掉后会影响主句意义。
在非限制性定语从句中，从句与主句的关系相对松散，从句 是对名词的补充说明，去掉后不会影响主句意义。
05
常见错误与注意事项
常见的使用错误
混淆了限制性和非限制性定语从句的区别
01
在写作中，学生常常将非限制性定语从句误用为限制性定语从
例如：The book that I borrowed from the library is very interesting. （我从图书馆借的那本书很有趣。）
非限制性定语从句实例
非限制性定语从句用于对名词进行补充说明，通常用逗号与主句隔开，去掉后不 影响主句意思。
例如：My sister, who is a doctor, is very busy.（我妹妹是一个医生，她非常忙。）
可省略，不影响句子的完整性。
英语限制性定语从句和非限制性定语从句共28张
有时同一个限制性从句变为非限制性从句 会改变全句的意思。 1. I have a sister who works in a hospital . 我有一位在医院工作的姐姐。 （不只一位姐姐） 2. I have a sister, who works in a hospital .
我有一位姐姐，她在医院工作。 （只有一位姐姐）
The Restrictive and Non- Restrictive Attributive Clause
惠东高级中学：黄玉娥
Can you tell the difference between Restrictive and Non-Restrictive Clause?
A. In written form
Attributive Clause 把下面的句子改为定语从句 1. Here are the farmers. They discovered the underground city last month. Here are the farmers who discovered the underground city last month.
B. In how close the clause is connected with the main sentence
e.g. Beijing is a city that I've always wanted to visit.
Beijing, which is the capital of China , has a long history. Mr. Black is the man who rescued me from the river . Mr. Black, who is a doctor , rescued me from the river.
限制性定语从句和非限制性定语从句讲解课件共25张
与其他从句的区别
与非限制性定语从句的区别
限制性定语从句对所修饰的名词或代词进行或代词的附加说明，可以 省略不影响句子意义。
与同位语从句的区别
限制性定语从句是对名词或代词的修饰限定，而同位语从句 则是对名词或代词的补充说明，两者在功能和意义上都有所 不同。
定义
限制性定语从句用于修饰名词或代词 ，对所修饰的名词或代词在意义上进 行限定，使其更具体、更明确。
特点
与主句关系紧密，不可省略，如果省 略会影响句子的完整性或意义。
用法与例句
用法
在句子中，限制性定语从句紧跟在先行词后面，通过关系代词或关系副词引导， 对先行词进行修饰限定。
例句
The book that I borrowed from the library is very interesting. (关系代词 that引导)
限制性定语从句和非限 制性定语从句讲解课件
目录
Contents
• 引言 • 限制性定语从句 • 非限制性定语从句 • 限制性定语从句与非限制性定语从
句的区别 • 练习与巩固 • 总结与回顾
01 引言
课程介绍
课程背景
介绍定语从句在英语语法中的重 要地位，以及学习定语从句对于 提高英语表达和理解能力的意义 。
03 非限制性定语从句
定义与特点
定义
非限制性定语从句是对先行词的附加说明，与主句关系不紧密，去掉后不影响主 句意思。
特点
使用逗号与主句隔开，对先行词进行补充说明，但不强调先行词与从句的关系。
用法与例句
用法
在句子中充当定语，修饰名词或代词。
例句
The book, which was written by a famous author, was highly recommended.（这本书是由著名作 家所写，备受推荐。）