d. 当关系代词后面带有插入语时
Here is the English grammar book which, as I have told you, will help improve your English.
I’ve bought you some books which I think may interest you.

C.只用who不用that
a.先行词是one, ones或anyone时
One who does not work hard will never succeed.
Anyone who breaks the law should be punished.
She is the only one of the students who has been to the USA.
b.先行词为those 或被those修饰，指人时
Those who learn not only from books but also through practice will succeed.
c.在以there be…的句子中，先行词为人时
There is a comrade outside who wants to see you.
d. 当定语从句中又有定语从句，且先行项都为人时
The student that won the first prize is the monitor who works hard.
e.当指人的先行项被一些指物的名词修饰时
There 's only one student in the school who I want to see.
Do you know the woman in blue with a baby on her back who is working in the fields?
f. 在非限制性定语从句中指人
I met a friend of mine in the street, who had just come from America.
g.定语从句中有插入语时, 并不影响关系代词和副词的选择。
Jackson is a man who I believe is honest.
He won another award, which I think is the result of his hard work.

D.在定语从句中，whose作定语，　其先行项既可以是人，又可以是物
Lei Feng was a great communist fighter whose death was weightier than Mount Tai.
Where’s the window whose glass is broken?
E. 在定语从句，关系副词when, where, why与关系代词which, that的关系
July 1st, 1921 is the day that/which we Chinese should always remember.
This is the place that/which they visited last year.
Please give me a reason that/which could account for your absence.
I still remember the day when(=on which) I joined the army.
This is the room where(=in which) Luxun once lived.
Another reason why(=for which) he works hard is that he has pass the exam.
F.  as, which的比较
a.在非限制性定语从句中，均可替代整个主句或句中某个部分，在从句中作主语，宾语，表语．如从句在主句之后，两者皆可用
They failed in the exam, as/which is natural.
She seems a scientist, as/which in fact she is.
Grammar is not a set of dead rules, which/as I have said before.

b.如从句在主句之前，用as
As we all know, his parents were killed in this war.
As is known to all, the earth travels around the sun.
c.如关系代词代表主句全句意思，有＂正如．．．＂＂就象．．．＂之意时，用as
We won the match, as we had expected.
He agreed to the plan, as was to be expected.
d. 当先行项被the same, such, so修饰时，用as
This is the same book as you bought yesterday.同类书 (比较：This is the same book that you bought yesterday.同一本书)
Don’t believe in such men as praise you to your face.
I never give my students so difficult a question as no one can work out.
e. 当从句内容对主句内容起消极作用，则用which
The young man cheated his friend out of much money, which was disgra                      定语从句小结

. as 也可以用来引导非限制性定语从句， 用来指待一件事，这时它的位置可以放在句首、句中和句尾。
e.g. He is an American, as/which we know from his accent.
   As we know from his accent, he is an American.
   He, as we know from his accent, is an American.
   As has been said above, grammar is not a set of dead rules.
Grammar, as has been said above, is not a set of rules.
Grammar is not a set of dead rules, as/which has been said above.
   
正如: As everyone knows, as you may still remember, as you said, as I can see, as has been mentioned above, as you may have heard, and etc.


定语从句的练习：
I passed him a glass of whiskey, ______ he drank at once.
He spoke to me in a way _______ I don’t at all like.
It is a famous university ________ he graduated 3 years ago.
Are you the lady ______ asked for help?
The service __________ students complain a lot should be improved.
He works in a college ______ students are all women.
The picture ______ he paid $100 was once owned by a king.
Can you think of a situation ________ this word can be used?
We can see very clearly the method ______ the computers work.
_______ he introduced just now, Dr. Baker is an expert in Biology.
I’m grateful to him for that advice, ______ I owed all my success.
This is the famous star ______ photos are on this magazine.
The science of medicine, ________ progress has been very rapid lately, is perhaps the most important of all the science.
定语从句的用法
(一) 定语从句的作用
作用 在句子中作定语,修饰句子中的某一名词或代词,从句须放在先行词之后。
关联词 关联词用于引导一个定语从句,代替先行词在从句中充当一定的成分。
(二) 关系代词的作用

1.作主语 1. The student who is talking with the monitor is Lucy.（指人作主语）
2. A dictionary is a book which gives the meaning of words.（指物作主语）
2.作表语 3.She is no longer the girl that she used to be.（指人作表语）
3.作宾语 4The student whom (who)you want to see has come already.（指人作宾语）
5.The letter which I received yesterday was from a friend of mine.（指物作宾语）
4.作定语 6.The girl whose mother is a teacher studies very hard.（指人作定语）
(三) 须用that引导的定语从句
1.nothing,everything,anything,much, all,little等不定代词作先行词时，常用that引导从句.something两者均可。 Is there anything that I can do for you?
2.指物的先行词前被序数词修饰时。 The first thing that we should do is to help him.
3.指物的先行词前被形容词最高级修饰时。 This is the best foreign film that I have ever seen.
4.指物的先行词前被the very, the only, the same修饰时。 That’s the very tool that we are looking for.
5.先行词既指人又指物时。 They talked about the things and friends that they could remember.
6.主句是由Who/Which引导的特殊疑问句时。 Who is the man that is standing over there?
Which is the tool that you are looking for?
(四).不可由that引导的定语从句
1.在非限制性定语从句中。 Mr Smith ,who lives in Chicago, is a doctor .
2.关系代词在从句中作前置介词的宾语时。 This is the room in which Mr Liu once lived .
3.由that作先行词时。 The bread which is made by my mother is better than that which is sold in food shops.
4.someone.somebody,nobody,anyone,anybody,everyone,everybody等指物的不定代词作先行词时。 Anyone who breaks the law will be punished.
（五）.非限制性定语从句的特点：1.不能用that引导定语从句。2.关系代词不能省略。
（六）关系副词的用法：关系副词代替先行词在定语从句中与相应的介词一起充当状语。
1． When指代表示时间的先行词在定语从句中与相应的介词一起充当时间状语。例如：
October 1，1949 was the day when（=on which） the People’s Republic of China was founded.
2． Where指代先行词在定语从句中与相应的介词一起充当地点状语。例如：
We will visit the house where(=in which)Lu Xun was born.
3. why代替先行词在定语从句中与相应的介词一起充当原因状语.例如:
Who can tell me the reason why(=for which) Tom was absent today?
配套定语从句专练：
1.The man_____talked to you just now is an engineer of the computer company.
A.who B.which C.where D.when
2.I still remember the days_____we studied together in the school.
A.that B.which C.where D.when
3.After living in Paris for fifty years he returned to the small village____he grew up.
A.which B.where C.that D.when
4.Can you tell me the name of the factory____you visited last week?
A.what B.where C./ D.when
5.Is this the house _____Shakespare was born?
A.at which B.which C. at where D. in which
6.In the dark street,there wasn’t a single person____she could turn for help.
A. that B. who C. from whom D. to whom
7.All_____is needed is a supply of oil.
A .the thing B. that C. what D. which
8.Corn was not the only food_____was taken to Europe.
A. which B. who C. / D. that
9.Look at the man and his horse____are walking up the street.
A. which B. who C. what D. that
10.She is no longer the student ____she used to be.
A. who B. whom C. which D. that
11.I don’t like_____you speak to her.
A. the way B. the way in that C. the way which D. the way of which
12.He paid the boy 10 yuan for washing ten windows,most of____hadn’t been cleaned
A .there B. those C. that D. which
13.Mr Green has two daughters,both of____are doctors.
A. them B. whom C. who D. that
14.Whose is this book the cover_____is blue?
A. whose B. its C. which D. of which
15.I like to live in the house _____windows face south
A. which B. of which C. whose D. where
16.His parents would’t let him marry anyone____family was poor.
A/ of whom B. whom C. of whose D. whose
17.In Sydeny, the Chinese team got 28gold medal,______were won by women.
A.18 of which B.18 of that C.which of 18 D.18 in which
18.Abraham Lincoln, ____ was born in Kenturkey ,studied law in his spare time and later became President of the USA.
A.what B.who C.whom D.which
19.Those _______ have any questions please put up your hands.
A.which B.that C.whom D.who
20．Anyone______ breaks the law will be punished.
A. whoever B.whom C. who D.no matter who


Keys:1-5:ADBCD 6-10:DBDDD 11-15:ADBDC 16-20:DABDC

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