定语从句考纲要求：掌握定语从句的基本知识；区分定语从句和名词性从句的性质和用法。
在具体的语境中考查非限制性定语从句的引导词以及“介词+关系代词”引导的定语从句；设置语境，考查抽象地点或时间概念的名词作先行词时关系副词的选择，甚至通过增加先行词的隐蔽性来增加试题的难度；考查定语从句的特殊句型，即：特定词汇+of whom/which 引导的定语从句。
复合句中修饰名词和代词的从句叫做定语从句，被修饰的名词或代词叫先行词。
引导定语从的连接词有关系代词who, whom, that, which, whose, as 和关系副词when, why, where等。
这些关系代词或关系副词有替代先行词，连接主句和从句，并在从句中充当成分三个作用。
定语从句有限制性定语从句和非限制性定语从句两类。
限制性从句是句子不可缺少的部分，主句和从句间不用逗号隔开。
非限定性定语从句是对主句先行词的补充说明，去掉不影响主句意思的完整性。
一般用逗号把主从句分开。
关系代词that不可以引导非限定性定语从句，其他可引导定语从句的连词均可引导非限定性定语从句。
先行词：被定语从句修饰的名词或代词叫做先行词，定语从句必须放在先行词之后。
有时先行词是关系代词前的整个句子。
1.当先行词是人：关系词要用who, whom, that, whose等，其中who/that 在从句中课充当主语或宾语，whom 在从句中只能充当宾语，whose在从句中充当定语,不可省略(of whom 可以代替whose指人，词序是名词+of whom。
)This is the man who/that can speak several foreign language.（who/that 在从句中作主语，不可省略）I like the girl (who/whom/that)you referred to yesterday.(who/whom/that 在从句中作宾语，可省略）The government tried to help the old woman whose son (of whom the son/the son of whom）died in the war. [注意：whose与所修饰名词之间无任何冠词，否则要用of whom]注意：➢若连接词在从句中作介词宾语并且介词在前面，代替人必须用whom，且不可省略There is nobody in the street to whom I can turn for help.(turn to sb for help 求助于某人)➢若介词在后面，则who, whom或that均可引导从句，且可以省略。
There is nobody in the street that /who/whom I can turn to for help.（填一填）The settlement is home to nearly 1000 people, many of ________ left their village homes for a better life in the city.➢在下列情况下多用who或whom,而不用that①先行词是all, anyone, one, ones, those, people等时All who can dance well will be invited.（who在从句中作主语）Those who (whom)he knows will be invited.(who/whom在从句中作宾语）②在被分割的定语从句中A new teacher will come who will teach us English.③在there be句型中There is a girl who wants to see you.④一个句子中有两个定语从句，其中一个用that引导，为了避免重复，另一个用who.Every student that is from China who likes English will have a chance to get a book.2.当先行词是物：连接词要用which，that，whose，which/that在从句中作主语或宾语；whose在从句中作定语，后直接跟名词，无冠词，若有则用of which。
（whose是一个表示所属关系的词,在定语从句中做定语,相当于my, his, her, its, their 等修饰人或物。
of which可以代替whose指物，词序一般是名词+of which或of which+名词。
）The building which/that stands in the center is our school library.（which/that在从句中作主语，不可省略）This is the book (which/that)you want.(which/that 在句中作宾语，可以省略）The building whose window (of which the window)faces south is our school library.(作定语）（填一填）Look out! Don't get close to the house ________ roof is under repair.注意：➢如果关系代词在句中作介词宾语并且介词在前面，必须用which，且不可省略。
The house in which I live is near yours.The house (that/which )I live in is near yours.➢非限定性定语从句中不用that引导（填一填）The newly-built cafe, the walls of _______ are painted light green, is really a peaceful place for us, especially after hard work.➢宜用that，不宜用which的情况①先行词是all, anything, everything, nothing, much, little, few, none ,the one等或被any ,no, the only, the very（恰好）,the last, just, every 等词修饰时，只能用that，但是先行词时something时，用that或which都可以。
Have you written down everything that Mr. Smith said?There is nothing that will stop us making progress.This is the very book that I want.This is the only problem that we can't work out.②先行词是形容词最高级或先行词的前面有序数词或形容词最高级修饰时（填一填）The first place _______ I visited in Beijing is the Great Wall, ________ is the greatest place _______ I have ever visited.③先行词为特殊疑问词who，which等时Who that can climb up to the top of the hill first will get the red flag.Which is the T-shirt that fit me well?④先行词既有人又有物时We are talking about the man and his interesting stories that moved us all.⑤当先行词为the way, the time, the period 等时，关系代词常用that，但通常被省略。
This is the last time(that) I shall help you.⑥当先行词在主句中作表语，而关系代词在从句中也作表语时Our village isn't the small quiet place that it used to be.➢宜用which，不宜用that的场合①引导非限制性定语从句which可代表先行词或者前句，译成“这一点，这件事”Tom came back, which made us happy.②一个句子中有两个定语时，为了避免重复，一个用that，另一个用whichLet me show you the novel that I borrowed from the library which was newly open to us.③在介词提前的定语从句中，只用which而不用thatThis is the house in which Lu Xun used to live.3.when, where, why 引导的定语从句关系副词在定语从句中充当状语，在定语从句中一般不可省略I know the reason why he is late.（why在从句中作原因状语）This is the house where I have lived for five years.（where 在从句中作地点状语）I will remember the day when I was admitted into this university.（when在从句中作时间状语）（填一填）The girl was arranged to have piano lessons at the training centre with her sister _______ she would stay for an hour.1)when的用法when代替"at/in/on/during +which"在定语从句中作时间状语，其先行词通常是time, day, morning, hour, night, week, year等I'll never forget the time when I won the prize.October 1st ,1949 was the day when/on which the People's Republic of China was founded. 2)where的用法where代替“in/at/on/under等+which”在定语从句中做地点状语。