定语从句的引导词
（1）who/whom。
例如：The person who broke the window must pay for it.
I don’t like people who talk much but do little.
Success will belong to those who never say “impossible”.
（2）whose。
例如：I know the boy whose father is a professor.
（3）which。
例如：A dictionary is a book which gives the meaning of words.
[玫瑰]只能用which，不能用that 的情况：
①非限制性定语从句。
例如：I will take this one, which was exactly what we wanted.
②先行词是物，从句由“介词 which”引导。
例如：The thing about which he is talking is of great importance.
③which引导的从句修饰前面的整个主句=and this。
如：He succeeded in the competition, which made his parents very happy.
（4）that。
[玫瑰]只能用that,不用which 的情况：
①先行词是all，everything，anything，nothing等不定代词时。
例如：All that he said is true.
There is nothing in the world that can frighten him.
②先行词被very，some，any，much，few，little，only，no等词修饰。
例如：This is the only book that the old man is interested in.
③先行词既包括人又包括物。
例如：He talked about the people and the things that he remembered.
④先行词是形容词最高级或被形容词最高级修饰的词。
例如：It seems to be the best way of communication that people like.
She is considered as the most beautiful teacher that gave her love to the students in danger.
⑤先行词是序数词或被序数词修饰的词。
例如：when he got to the island, the first thing that he did was to look for some food.
I had found the last newspaper in the office that carried the important news.
（5）when 。
例如：I’ll never forget the time when we worked on the farm.
（6）where。
例如：The factory where his father works is in the east of the city.
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