1、定语从句用法（上）定语从句在句中相当于一个形容词。起定语的作用，修饰说明名词、代词或主句的全部或部分内容。定语从句一般放在被修饰的词语之后，由关系代词或关系副词引导。（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
2、 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 k
3、ite 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
4、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
5、house whose windows are newly painted is mine. 窗户刚刚油漆过的房子是我的。定语从句用法（下）1. 只能使用that 的几种情况在下面的情况下，只能使用that 引导定语从句。1. 当先行词是不定代词或被它们修饰时。Is there anything that I can do for you?有什么要我做的吗？All that can be done must be done.凡是能做的事情都必须做。He answered few questions that the teacher asked.他几乎没有回答老师的那些问题。2. 当先行词被形容
6、词最高级或序数词修饰时。This is one of the most interesting books that were sold in this bookstore.这是这家书店售出的最有趣的书之一。The first thing that should be done is to get some food.该做的第一件事是弄点吃的。3. 当先行词有the very, the only, the same等词语修饰时。Thats the only thing that we can do now.目前我们只能这样了。Those are the very words that he u
7、sed.那就是他的原话。4. 当先行词是一个既指人又指物的词组时。They were talking about the persons and things that they saw in the factory.他们在谈论在工厂里看到的人和事。5. 当关系代词在定语从句中作表语时。China is not the country that it was.中国已经不再是过去的中国了。6. 当要避免和疑问词which重复时。Which is the car that was made in Shanghai?哪辆车是上海制造的？2. 关系副词引导的定语从句1关系副词when在句中作状语，表示时间。It happened on the day when I came back from Guangzhou.这件事发生在我从广州回来的那一天。2关系副词where在句中作状语，表示地点。This is the room where Lu Xun once lived.这是鲁迅曾经住过的房子。这里的关系副词where可以用in which替换。3关系副词why在句中作状语，表示原因。Do you know the reason why we left here?你知道我们离开这儿的原因吗？