先行词
The number of people who lost homes in the earthquake reached as many as 250,000.
定语从 句
The boy was John's brother. We saw him yesterday.
先行词 关系词 定语从 句
The boy whom we saw yesterday was John's brother.
4. 定从的分类：
限定性定语从句 非限定性定语从句
第 二 部 分
关系代词 的作用和用法
关系代词 先行词
在句中作用
主、宾（可省略），只用于限 定性定从 主、宾（可省略） 主、口语中作宾语时可省略
that which who whom whose as
考 点
介词＋whd worker. I learned a lot from him. Mr. Liu is a good worker from whom I learned a lot. I left my wallet in the taxi. I came here in the taxi. I left my wallet in the taxi in which I came here.
2. 当先行词是序数词或被序数词所修饰时 The third thing that should be done is to get the tickets. When people talk about Hangzhou, the first that comes to mind is the West Lake.
人/物 物 人
人 宾（限定性定从中可省略） 人/物 定（不可省略） 人/物/事情 主、宾、表
考 点
that和which
在限定性定语从句中，which和 that都指物时，可通用。 The picture that/which was drawn by Tom was nice.
注意注意： 下列情况，只用that 不能用which
Basketball is George’s favorite sport. He spent much time on the sport. Basketball is George’s favorite sport on which he spent much time. My pencil is broken. I often write homework with the pencil. My pencil with which I often write homework is broken.
关系代词前介词的确定
1.根据从句中动词与先行词的逻辑关系，请体会： e.g. Is that the newspaper for which you often write articles? 2. 根据从句中动词或形容词的习惯搭配，如： e.g. Can you explain to me how to use these idioms about which I’m sure. 3. 根据先行词与介词的搭配习惯，请体会： e.g. 1949 was the year in which the P.R.C. was founded.
3.一个句子中带有两个定语从句，其中一个定语从 句的关系代词是 that另一个用who
e.g. The boy that you met last night is the group leader who studies very hard.
4.在there be 开头的句中用who
whom 的用法
只用that 不能用which，简单汇总
1. 当先行词是不定代词或被不定代词修饰时 2. 当先行词是序数词或被序数词所修饰时 3. 当先行词是形容词最高级或被形容词最高级修饰 4. 当先行词被 the very, the only修饰 5. 当先行词既有人又有物时 6. 当主句是以 which,who 开头的特殊疑问句时
4. 当先行词被 the very, the only（唯一）修饰时。
This is the very book that I want to find. 5. 先行词既有人又有物，用which和who都不合适时 The guests spoke highly of the children and their
e.g. Those who want to see the film put up your hands.
2. 先行词有较长定语时用who
e.g. I met a foreigner in the street yesterday who could asked me questions in Chinese.
7. Which was the hotel _____ was recommended to you? A. that B. which C. where D. it
考 点
who 的用法 whom 的用法
who 的用法
who代人，在从句担任主语，也可代替在从句中 做宾语的whom，前面不能有介词。 如有介词则必用whom（结构：介词+whom）。
Who is the girl that is talking to our teacher?
7. 两个重叠的定语从句，其中一个关系代词已用 who 或者 which，为了避免重复, 而用 that。 He built up a factory which produced things that had never been seen before.
4.非限制性定语从句中，要表示先行词 的一部分时，可用“数词/代词 + of + 关系代词”的结构，如：
e.g. There are 50 students in our class, two- thirds of whom have been to Beijing.
5. Whose从句可转换为“ of +关系代词”型， 如： e.g. They live in a house, whose door opens to the south. They lived in a house, of which the door opens to the south. They lived in a house, the door of which open to the south.
2. 先行词: 被定语从句所修饰的词。 3. 关系词: 引导定语从句的词。
关系代词: that, which, who, whom, whose, as 关系副词: when, where, why
.
The number of people reached as many as 250,000. They lost homes in the earthquake. 关系词
Let’s study it together.
第 一 部 分
定语从句 相关概念
复合句: 主句+从句
主句是一个完整的句子,它包含一句子的主 要主语和动词。 从句是一个从属的句子,它必须和一个主句 连用。 1. 定语从句的定 义： 在复合句中修饰某一名词或代词的从句。 The girl who is standing there is Mary.
• 先行词为人， 并且在定语从句 中做宾语,可以省略。 • Where is the man (whom) I saw this morning?
考 点
连接词whose 的用法
whose 的用法
1。是代词的所有格（‘的’），其先行词不仅可
以指人，还可以指物。
I saw a woman whose bag was stolen. Please show me the bag whose cover is red Do you know the woman whose husband is a doctor?
注意注意：在下列情况中，只能用 that，不用 which：
1. 当先行词是不定代词或被不定代词修饰时 （all, a lot, (a) little, few, much, none, anything, sth, everything, nothing ）。 All that can be done has been done. There's nothing that can be said about it. You can take any seat that is free.
This is a book whose cover is green.
2。 whose的先行词指物时, 可用of which代替, 但词序不同， 即whose+名词=the +n + of which =of which + the + n. He lives in the room whose window faces south. = He lives in the room, the window of which faces south. = He lives in the room, of which the window faces south.
performances that they saw at the Children’s Palace. The writer and his novel that you have just talked about is really well known.
6. 当主句是以 which,who 开头的特殊疑问句时 Which is the car that killed the boy?
关系词 that which who whom whose as when where why