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定语从句一．定语从句的定义：所谓定语从句，就是用一个句子来做定语来修饰一个名词，其中被修饰的名词叫做先行词，连接先行词和从句之间（或者说引导定语从句）的词语叫做关系词，关系词分为关系代词和关系副词。
其中常见的关系代词有：that,which,who,whom,whose,as,but,than;常见的关系副词有：why,when,where.（注意：what，how，whether，if和特殊疑问词+ever不能引导定语从句）。
二．如何选择定语从句的连接词：首先明确先行词是什么，然后找到后面的从句，把从句单独拿出来分析，看一看先行词在句子中做什么成分，根据语法选择连接词。
Eg:He tried to escape from the prison that/which was builtin the Middle Age .分析：1.找先行词：prison 2.把prison放入从句中可以看到prison在从句中是做主语，即the prison was built in the Middle Age .而在定语从句中能充当主语的连接词一般情况下是that和which，于是就能选出连接词了。
三．连接词的用法：1.that：可以修饰人和物，在从句中作主语或宾语,表语，做宾语的时候一般情况下可以省略。
Eg: She is a girl who/that has long hair.(在从句中做主语) Is this the news (that)/which you wanted to tell me yesterday?(在从句中做宾语，可以省略that)He is no longer a kind-hearted man that he used to be(在从句中做表语)注意：1）that可以用于表示时间、地点、方式、理由的名词后取代when, where, why和"介词+ which"引导的定语从句，在口语中that常被省略，例如：His father died in the year (that / when / in which) he was born. 他父亲在他出生那年逝世了。
定语从句（一）--------关系代词的用法一．定语从句的概念在复合句中，修饰某一名词或代词的从句叫定语从句。
被修饰的名词或代词叫先行词，定语从句一般放在先行词的后面。
引导定语从句的词叫做关系词。
关系词有三个作用：1、引导定语从句;2、代替先行词；3、在定语从句中担当一个成分。
二、定语从句的关系词引导定语从句的关系词有关系代词和关系副词，常见的关系代词包括that，which，who，whom和whose，关系副词包括where，when，why等。
Mary likes music that is quiet and gentle.玛丽喜欢轻柔的音乐。
（that作主语）The coat （that）I put on the desk is blue.（that作宾语）The building which stands near the train station is a supermarket. （作主语）The film （which）we saw last night was wonderful. （作宾语）3. who指人在从句中做主语或宾语，作主语不可省略，作宾语可省略。
例如：The boys who are playing football are from Class One.翻译：指人，在定语从句中充当宾语，常用who代替，可省略。
例如：Mr. Ling is just the man whom I want to see.翻译：5..whose通常指人，也可指物，在定语从句中做定语(1) He has a friend whose father is a doctor.(2) I once lived in a house whose roof has fallen in.(3) The classroom whose door is broken will soon be repaired.(4) The classroom the door of which is broken will soon be repaired.(5) Do you like the book whose cover is yellow(6) Do you like the book the color of which is yellow2. 关系词只能用that的情况：a. 先行词被序数词或形容词最高级所修饰，或本身是序数词、基数词、形容词最高级时;例如：He was the first person that passed the exam. 他是第一个通过考试的人。
，定语从句（1）概念引入：She is the girl who sings best of all.她是所有人中唱得最好的。
This is the best film that I have ever seen.这部电影是我看过的最好的一部。
He had failed in the maths exam, which made his father very angry .他数学考试没有及格，这使他的父亲很生气。
Give me the b ook whose cover is green.把那本儿绿皮儿的书给我。
定语从句是我们初中学过的一项语法，上面这些句子与你初中学的有差别吗？是不是有点不同呢？从这个单元开始，我们将学习定语从句的升级版，但还是从头开始学哟。
语法点拨【高清课堂：定语从句一 P1】定语从句的定义 Do you know the girl who came here yesterday? 你认识昨天来的那个女孩吗？The book which he bought the day before yesterday is very good .他前天买的那本书很棒。
He is the man whom we should learn from . 他就是我们应该学习的人。
Her friend whose home is very far came to see her . 她的那位家很远的朋友来看她了。
其中粗体的部分就是定语从句，划横线的部分叫做先行词，也就是被定语从句修饰的词。
定语从句：修饰一个名词或代词的从句称为定语从句，一般紧跟在它所修饰的先行词后 面。
先行词：被定语从句修饰的名词或代词。
关系词：上面例子中的关系代词 who, whom, which, that 是用来引导定语从句的连接词。
这些连接词代替先行词在从句中担任一个成分，如主语、宾语或表语。
例如：Those students who study in this school are good at football.（who 代替先行词 students 在从句中充当主语）There is still mu ch homework which we must finish.（which 代替先行词 homework 在从句中充当宾语）关系代词引导的定语从句I. who 和 whom1. who 和 whom 代表人, 当先行词在从句中作主语时用 who 引导，作宾语时用 whom 引导。
一. 教学内容：语法——定语从句〔1〕什么是定语？定语是用来修饰名词或代词的，对其起修饰限制作用。
被修饰的词叫先行词。
英语中可以作定语的词包括形容词〔短语〕，介词短语，非谓语动词等。
→ a pretty girl→ a bottle full of water→the book on the table→the girl standing over there→the school built in 1970此外，句子也可以作定语，也就是定语从句。
→the girl who is standing over there.→the school that was built in 1970.引导词：关系代词和关系副词特点：①连接作用：引导从句，把它和主句连接起来。
②替代作用：在从句中替代它前面的先行词。
③成分作用：在从句中充当句子成分。
关系代词：that, which, who, whom, whose→A plane is a machine that can fly. (指物，作主语)→The noodles (that) I cooked were delicious.〔指物，作宾语〕→Shanghai is no longer the city that it used to be. (指物，作表语)→Let’s ask the man that is reading the book over there.〔指人，作主语〕→The girl (that) we saw yesterday is Jim’s sister. 〔指人，作宾语〕→They planted the trees which didn’t need much water. 〔指物，作主语〕→The fish (which) we bought were not fresh.〔指物，作宾语〕→The boy who broke the window is called Michael.〔指人，作主语〕→The person (whom/who) you talked to is my math teacher. 〔指人，作宾语〕→Miss Flower is the teacher whose house caught fire last week.〔指人，作主语〕→This is the house whose window broke last night. 〔指物，作主语〕英语中，定语从句分限制性定语从句和非限制性定语从句。
定语从句1知识点总结一、定语从句的定义定语从句（adjective clause）是一种修饰名词或代词的从句，用来限定这个名词或代词的含义。
定语从句通常由关系词引导，并且关系词在从句中充当某一成分的作用。
二、关系词的种类1.关系代词引导定语从句的关系代词有：who, whom, whose, which, that等。
- 用来修饰人的关系代词有：who, whom, whose- 用来修饰物的关系代词有：which, that2.关系副词引导定语从句的关系副词有：when, where, why, how等。
- when用来指代时间，where用来指代地点，why用来指代原因，how用来指代方式。
三、定语从句的位置1.定语从句可以放在先行词之后，例如：The man who is talking to my mother is a doctor.2.定语从句也可以放在先行词之前，例如：That is the man who is talking to my mother.3.定语从句还可以放在先行词之中，例如：The man who my mother is talking to is a doctor.四、定语从句的特点1.从句中所含的主谓结构要完整The book that I want to read is on the desk.2.从句中的主语和先行词相同The girl who is singing is my sister.3.从句中的关系词在从句中的作用The car which you bought is very expensive.五、在定语从句中关系词的省略在定语从句中，当关系词作为宾语或者介词宾语时，可以省略。
The book (that) I want to read is on the desk.The person (whom) I am talking about is my friend.六、定语从句的引导词用法1. who和whomWho用来指人，作主语或者宾语。
定语从句定语从句入门一.定语:修饰一个名词或代词的词和词语。
a useful mapa 5-year-old boya developed countrya book to be publishedsomething importantThe man whom we saw just now is our headmaster.二.用来修饰主句中某一名词或代词,或修饰整个句子或主句中一部分,而起定语作用的句子叫作定语从句(Attributive subordinate clause),又称关系从句(Relative Clause)。
.The boy（who you are talking about）is over there定语从句的基本概念1、位置：定语从句一般置于所修饰名词或代词（即先行词) 的后面2、结构: 关系词+ S +V3、关系词：定语从句和主句之间有关系词来连接4. 翻译方法:“….的”练习: 请找出下列句子中的定语从句。
1.The book that I borrowed from the library is well written.2.Is she the girl who would like to join the army ?3.Did you see the young man who was chosen as the leading actor?4.The worker who repaired our house lives next door to Li Hua’s.5.The person whom/who you want to see comes.6. The girl that studies music plays the violin very well.7.The day which I was looking forward to arrived at last.8. Is there anything that belongs to you?9.This is the girl who practices playing the piano every day.10.The watch which her mother gave to her works very well.11.This is the shop which keeps open till eleven at night.你能发现几个关系代词?关系代词与先行词是什么关系?关系代词在定语从句中充当什么成分?三.关系代词的作用关系代词有三个作用：一、引导定语从句二、代替先行词，三，在定语从句中充当一定的句子成份。
改错
1.Altogether I had five roommates, two of which arrived later.
2.I will say something about a foreign place that I want to stay for a
leisure time.
3.First, the place where we’ve decided to visit---the Forest Park is not
far away from the city.
4.People’s healt h is harmed once they take in these gases, what may
cause a series of diseases like lung cancer.
5.The day before yesterday, I went to the largest bookstore where is
near our school to buy a reference book.
6.Yang Ling, which is an expert from a health center, said students
should try to use their mobile phones less, especially at school.
7.The products are provided for the school canteen, which we enjoy a
healthy diet.
8.In their spare time, they are interested in planting vegetables in their
garden, that is on the rooftop of their house.
9.Around me in the picture are the things they were very important in
my life at that time: car magazines and musical instruments.
10.The dishes what I cooked were Mom's favorite.
填空
11.But Sarah, _______ has taken part in shows along with top models,
wants to prove that she has brains as well as beauty.
12.A company_______profits from home markets are declining may
seek opportunities abroad.
13.The book has helped me greatly in my daily communication,
especially at work______ a good impression is a must.
14.I am looking forward to the day______my daughter can read this
book and know my feelings for her.
15.I borrowed the book Sherlock Holmes from the library last
week,______ my classmates recommended to me.
16.We’ll reach the sales targets in a month_______we set at the
beginning of the year.
17.Please send us all the information______you have about the
candidate for the position.
18.Until now, we have raised 50,000 pounds for the poor
children,_______ is quite unexpected.
19.Students should involve themselves in community
activities________they can gain experience for growth.
20.The exact year _______Angela and her family spent together in China
was 2008.
21.Among the many dangers________sailors have to face, probably the
greatest of all is fog.。
