city.
He has two sisters, who are working in the city.
（只有两个妹妹）
He will wear no clothes which will distinguish him from his fellow men.
He will wear no clothes, which will distinguish him from his fellow men.
2. 限制性定语从句
大多数定语从句都对所修饰词的意思加以限制，表示“…..的人（事物）”
The man who told me this refused to tell me his name.
I saw something in the paper which might interest you.
He is the man whose car was stolen.
This is the photo that I took.
The man who stole your car has been arrested.
Anyone who saw the accident please get touch with the police.
Everyone that knows him likes him.
The girl who came his morning is my cousin.
The man with whom I travelled couldn’t speak English.
Here is the boy who damaged the vase.
This is the village where he was born.
There are times when such things are necessary.
The man who did the robbery has been caught.
The chair which I sat in was a broken one.
当名词中心词带有表示类别的不定冠词时，其后的关系分句通常为限制性定语从句
She was a woman who must be treated decently.
She spoke to me in a tone which I don’t at all like.
当名词中心词带有前照应定冠词时，必定用限制性定语从句
He is the man who told me the news.
This is the car I bought last year.
当名词中心词带有all, any, some, every, no等不定限定词时，通常用限制性定语从句。
Any man who smokes cigarettes is risking his health.
Some friends that I made in college were more interested in grades than in learning.
He has read almost every book on linguistics that he could get hold of in the library.
No visitors who come to Beijing would fail to see the Great Wall.
3. 非限制性定语从句
非限制性定语从句对所修饰的名词没有限制意义的作用，而只补充一点情况，与主句关系不紧密，把其拿掉，主句照样成立，有逗号分隔，译成汉语时另起一个句子，仿佛是并列句
The chairman, who spoke first, sat on my right.
His speech, which bored everyone, went on and on.
My cousin, who is an engineer, went to Europe last week.
The driver, who was very young, had only just got his licence.
This book, which only appeared a year ago, has already gone through several editions.
The Chairman’s daughter, whose name is