形容词、名词、名词所有格、数词、介词短语、不定式、动名词、现在分词、过去分词、从句、表方位的副词。
定语从句用法如下：
1、who 指人，在定语从句中做主语。
What was the name of the man who lent you the money?借钱给你的那人叫什么名字？
2、whom 指人，在定语从句中做宾语。
The people whom I work with are all friendly.和我一起工作的人都很友好。
3、which 指物，在定语从句中做主语或宾语。做宾语时常可省略。
English is a language which is easy to learn.
4、that 指人时，相当于who 或whom；指物时，相当于which。在定语从句中做主语或宾语
The man that I talked with just now is a doctor.I lost the book that I bought last week.
5、whose 人、物皆可，做定语，后面要紧跟被修饰的名词，先行词和后面的名词之间往往是从属关系。
There are some people whose faces you can never forget.有些人，他们的脸你永远难以忘怀。