（一）关系代词引导的定语从句 1．关系代词who 表示“人”。
（1）在句中作主语。
The girl who is standing over there is her sister. 站在那边的女孩是她妹妹。
The foreigners who visited our city will leave for Beijing tomorrow. 参观了我们城市的外国人明天动身去北京。
（2）作宾语，这时还可以用whom替代。
The boy who you met just now is from Australia. 你刚才遇到的男孩来自澳大利亚。
The person with whom you talked just now is Mr. Brown. 刚才和你交谈的人是布朗先生。
2．关系代词which表示“物”。
（1）在句中作主语。
The TV sets which are produced in Shanghai are the best. 上海生产的电视机是最好的。
He wears long hair, which makes him like a girl. 他留了长发，这使他和女孩相象。
（2）在句中作宾语。
The kite which Emma is flying is the highest in the air. 埃玛放的风筝在空中飞得最高。
This is the place which I want to visit very much. 这就是我想去参观的地方。
（3）在句中作表语。
She is patient to the children, which she always is. 她地孩子们很有耐心，并且总是如此。
3．关系代词that可以指人，也可以指物。
（1）指人的情况 Who is the boy that is playing with them 和他们一起玩的男孩是谁（作主语） The computer that you are using is made in America. 你现在用的计算机是美国生产的。（作宾语） （2）指物的情况 A computer is a machine that can do many problems. 计算机是一种能解决很多问题是机器。作主语 The food that my mother makes is delicious. 妈妈做的饭和好吃。（作宾语） 4．关系代词whose可以表示人或事物，在句中充当名词的定语。
Do you know the girl whose hair is very long 你认识那个长头发的女孩吗 The house whose windows are newly painted is mine. 窗户刚刚油漆过的房子是我的。