定语从句。
一．定语从句的基本用法。
汉语中的“……的”即为定语。如：“美丽的春天”中的“美丽的”。如果定语由一个句子来充当，此句即称之为定语从句。由定语所修饰的词叫做先行词，如“春天”。
定语从句分为限制性定语从句和非限制性定语从句。它们的引导词分为关系代词和关系副词。判断使用什么引导词要判成分，看指代。
二．关系代词that, which用法之别。
引导定语从句的关系代词which, that 在修饰先行词时，一般可换用，有时则不可。它们引导定语从句有。
最基本的三点区别：
that 只用于限制性的定语从句； which 可用于限制性和非限制性定语从句。
that 可指人也可指物；which 只可指物。
that 不能至于介词后，引导定语从句时把介词放于句后，which 可置于介词后，也可把介词放在定语从句后面。
下面就which, that 不宜换用的情况，作一归纳：
1．只可用that的定语从句。
在修饰时间、地点等先行词时，只可用that代替when, where等关系副词，而不能用which。
that was the time that (=when) he arrived (at).
same 所修饰的先行词后可用that 而不可用which。
yesterday i met the same scientist that (=as ) you met last year.
主句是以who或 which 开头的特殊疑问句或先行词是疑问代词 who 时，定语从句要用 that 而不用which (who ,whom) 引导。（避免重复）
which is the room that mr wang lives in ?
who that has seen him doesn’t admire him ?
2．多用that（极少用which）的定语从句。
先行词为不定代词all, everything, nothing, anything , something , little , much , few, only thing, best 等或名词前带有all , every, no , some, any, little , much , few 等时，关系代词一般用that。
in this school we saw much (little) that was different from ours .
the only thing that matters is to find our way home.
you must pay attention to everything that i will do .
先行词包括人和物时用that.
our schoolmaster talked about the teachers and schools that he had visited.
先行词被序数词、形容词最高级（包括first , last）或被only , very等修饰时关系代词一般只用that。
he is the only person that is reliable .
what’s the first (best , last, only) english magazine that you h**e ever read ?
关系代词在定语从句中作表语时，多用that引导。
our village is no longer the place (that ) it used to be .
3.只用which 不用that的定语从句。
在定语从句中作介词宾语且置于该介词后，只用which。（介词在前）
the room in which we live is very clean.
在先行词是物的非限制性定语从句中，只用which.
i enjoy the dress, which my mother bought for my birthday.
定语从句是比较级，先行词是物，只能用than which(指人用than whom) ,than之后不用that。
here is our school , than which there is nothing better in our county.
这是我校，在我县再也没有比这更好的学校了。
先行词是that，指物，后面不能再用that，而要用which。（避免重复）
what’s that which is moving on the table?
在桌子上移动的东西是什么？
三、whose的用法。
1． 既可修饰人，又可修饰物，既可引导限制性定语从句，又可修饰非限制性定语从句。
2. “whose +名词”，有时可用“the +n. +of + which /whom ”或 “of + which /whom + the + n.”替换。
the house whose windows are painted green belongs to me .
= the house , the windows of which are painted green, belongs to me .
=the house , of which the windows are painted green, belongs to me .
四、关系词的省略 （做宾语）
1．关系代词作及物动词的宾语时。
that’s one thing (that /which ) i h**en’t forgotten today.
the boy (who /whom / that) we saw yesterday was john’ s brother.
2．关系代词作介词短语的宾语，且介词放在句末时。
is this your computer room ( that /which ) you work in?
the stranger (who / whom / that ) the villages paid a visit came from france.
注：若介词提前，关系代词必须用which 代表事物，用that代表人，而且不可省略。
is this your computer room in which you work?
the stranger to whom the villages paid a visit came from france.
五、which 和as 引导非限制性定语从句时的区别。
1. 都可代表整个主句的意思，都可在从句中作主语或宾语。
she was absent, which /as is often the case.
he is lying , which/as anybody can see.
2．如果从句的谓语动词是系动词，从句的主语可用as，也可用which；如果从句的谓语动词是行为动词，就只能用which。
he said he knew nothing about the accident , as / which was a lie .
our team won, which made us very happy.
3．as引导的从句可放在主句的前边或后边，意为“正如”；which 引导的从句只能放在主句的后边，意为“这一点”。
as is known to all, taiwan has always been a part of china.
her speech was wonderful, as we had expected .
the weather turned out to be very good, which was more than we could expect.
4. 用在such…as, 和the same…as 引导的定语从句中。
the word “write” has the same pronunciation as the word “right”.
he isn’t such a man as would bow before difficulties.
六、介词提前。
1．介词提前包括以下几种情况。
介词（包括复杂介词）+ which/ whom
介词+ which/ whose +n. (此时，which和whose 都作定语)
限定词（ some, none, all, both, several, either, many 等）+of which/ whom
数词或最高级+of which/ whom
2. 判断介词。
一要看句意，二要看搭配关系，即看后边的位于动词和前边被定语从句所修饰的名词或代词之间应搭配什么介词。（练习转换从句）
there is a great deal of oxygen around us , without which we could not live.
( we could not live without oxygen )
she met my father , from whom she got the news of my sister’s marriage.
定语从句语法讲解
一。词引导的定语从句。1.关系代词用来指代先行词是人或物的名词或代词。句子成分用于限制从句或非限制性从句只用于限制性从句。代替人代替物代替人或物。主语 who which that 宾语 whom which that whose of whom whose of which 例1 this is ...
定语从句讲解
定语从句一 课文原句。i like music that i can dance to 我喜欢可以随之跳舞的 rose likes music that s quiet and gentle.玫瑰喜欢轻柔的 i prefer singers who write their own lyrics 我喜...
定语从句讲解
定语从句。一 定语从句概念。定语从句，顾名思义，就是一个句子作定语从属于主句。定语一般是由形容词充当，另外，定语从句是由关系代词或关系副词引导的，故又称作关系从句。定语从句一般放在它所修饰的名词或代词之后，这种名词或代词被称作先行词。请看示例 the woman who lives next doo...