① 英语语法定语从句
单纯的说定语从句的话
只要明确了什么是定语
而什么是句子便可以了
二者综合成为顾名思义的定语从句
值得一提的是
定语从句基本上充当的是名词或形容词性
自然在意义上也属于名词或形容词
祝学业有成！
② 英语定语从句语法
定语从句是在句子中充当定语成分的从句，修饰名词和代词，即主语和宾语。下面是我认为比较要的点（从网上找的）。
That 指人或物 which 指人或物（定语从句中）
[注意] 1、because与so；(al)though与but；if与so不可以同在一个句子中成对出现。
2、时间、条件、原因,让步状语从句放在句首时需要用逗号与主句隔开。
条件状语从句中没有将来时，用一般现在代将来。
定语从句：在复合句中作定语用修饰句子中某一名词或代词的从句叫定语从句。 ① 定语从句的位置：放在名词或代词的后面。如：The man who has an umbrella in his hand is my uncle.
② 语法术语的改变：被修饰的名词或代词称为先行词；引导定语从句的连接词称为关系词,其中that、which、who称为关系代词,where、when、how称为关系副词。
③ 关系代词或关系副词的作用：关系代词who、whom 和whose指人,分别在从句中作主语、宾语和定语。which指物，that多指物, 有时也指人,它们在从句中可以作主语或宾语。定语从句中关系代词作从句宾语时可以省略。This is the thief (that/who/whom) we have been looking for these days. / Please find a room which is big enough for all of us to live in.关系副词when或where引导定语从句时,它们在从句中分别作时间状语和地点状语。如：This is the room where they had a quarrel a week ago. / I can never forget the day when I first saw you.
④ 限制性定语从句和非限制性定语从句。限制性定语从句在句中不能省略,否则主句意思就不完整。非限制性定语从句和主句之间往往用逗号分开,这种从句是一种附加说明,如果从句子中省去,也不至于影响主句的意思。如：She spent the whole evening talking about her latest book, which none of us had heard of.
[注解] 1、关系代词只能用that的情况：当先行词是指事物的不定代词(all, anything等),或先行词部分含有最高级,或含有序数词时,不能用其他的关系代词,只能用that. 如：All that Lily told me seems untrue. / Can you give me anything that has no sugar inside? This is the first two-story bus that runs in our city.
2、先行词既有指人的名词又有指物的名词时，关系代词用that而不用which.
Do you know the things and persons (that) they are talking about?
3.、主语是there be 句型时关系代词用that。
There is a book on the desk that I am very interested in.
3、关系代词在从句中作主语时一般用who(指人)、that(指物),而不用that指人或用which指物。 如：Do you know the woman who is weeping in the corner(? / Do not tell me any words that have nothing to do with me.
4、关系代词作从句的宾语时,常用which或whom,较少使用that或who,而且,关系代词常常省略。如：Tom’s father was the first parent whom our teacher talked to.
5、当关系代词紧跟在介词后面时,必须用which或whom,而当介词移到句尾时,则又可以使用that或who. 如：This is the room in which Miss Li once lived. (= This is the room Miss Li once lived in.
6、as引导非限制定语从句位置较灵活，可以放在主语前中后，which 引导的定语从句只能放在主语之后。
As everybody knows, Shakespeare is a famous writer.
Shakespeare, as everybody knows, is a famous writer.
Shakespeare is a famous writer, as everybody knows.
The plan worked out very well, which is more than we could expect.
.
5. 只用which,不用that的情况:
引导非限制性定语从句时;
引导词前有介词时;
一个句子中若有两个定语从句,一个用that引导,另一个用which引导;
e.g. He bought a book that could give him much knowledge and which could help him to kill the time.
6. 当those作为先行词指人时,通常只能用who引导;
as 从句的先行词是the same, such, 或被他们所修饰;多用于表示肯定意义的从句中,不用于表否定意义的从句中.
e.g. Many of the sports are the same as they were when they started.
The result was not such as he expected.
It was raining hard, which(as) was unexpected.
8. 介词+关系代词要根据
谓语动词的固定搭配 e.g. This is the evidence with which the case is connected.
先行词 e.g. I'll never forget the day on which\when I joined the party.
c. 句子表达的意思 e.g. The boss in whose department Mr King worked got sacked.
d. 在非限制性定语从句中,名词\代词+of+which\whom表示整体与部分的关系
e.g. The workers, some of whom stayed for four years, came from different countries.
e. 介词的位置一般放在关系代词之前,有时也可放在从句中原来的位置上.
e.g. We did it in the same way in which he did\which he did in.
9. That 作为关联词可以当作关系副词用
e.g. This is the house in which Louis XIII lived.
This is the house that Louis XIII lived.
This is the house where Louis XIII lived.
This is house which Louis XIII lived in.
This is the house Louis XIII lived in.
③ 英语语法 定语从句
1 第一题没有where这个选项呀！如果有，当然可以选的。
2 没有in which呀。在做此类题的时候内，可以把从句部分还原，容如：1题中，the papers are kept in the drawer,有介词in,所以用in which或where(the papers are kept somewhere,副词前不加介词的）；而2题中，this idiom can be used in the situation,所以只用which不对。
④ 英语定语从句，语法
定语从句中，连接先行词和定语的叫关系代词或关系副词。有一些情况下，关系代词可以省略：
1、当关系代词所代替的先行词在定语从句中做宾语，关系词可以省略。Whoistheman(that/who/whom)youweretalkingto? 刚才和你讲话的人是谁？
2、当关系代词that在定语从句中用作表语时，可以省略。
Chinaisnotthecountry(that)itwas. 中国已不是过去的中国了。
3、关系副词when用于day,year,time少数词后时可以省略（也可换成that）Thatwastheyear(that)Ifirstwentabroad. 就是那一年我第一次出国。
4、关系副词where用于place, somewhere, anywhere, everywhere, nowhere少数词后时可以省略(也可换成that)。
Thisistheplace(where)theymetyesterday. 这就是他们昨天碰头的地方。
5、当关系代词that在定语从句中用作宾语补足时，可以省略。
I’mnotthemadman(that)youthoughtme. 我并不是你所认为的那个疯子。
6、关系副词why通常只用于the reason后引导定语从句，且通常可换成that或for which，这些连接词都可以省略。
That’s the reason (why, for which, that) he came. 这就是他来的原因。
Give me one reason (why) we should help you. 给我举出一个我们应当帮助你的理由。
如有疑问，请追问，满意，请采纳，谢谢。
⑤ 英语定语从句
摘自《简明英语语法》
在英文中，有两种定语从句：限定性定语从句与非限定性定语从句。这两种定语从句在其功能和形式方面都有明显的区别：
限定性定语从句限定性定语从句与主句的关系很紧奏，对其先行词起限定、修饰的作用。如果将其去掉，会影响句子意思的完整性；有时甚至于引起费解、误解。例如：
Rainforests are being cleared for valuable timber and other resources to speed up the economic growth of the nationsin which they are located .
为了加速他们各自所在国家的经济发展，热带雨林作为有价值的原木和其他资源正为人们所砍伐。
Ocean currents affect the climates of the lands near which they flow.
洋流影响其流经的附近地区的气候。
They explained the reason to us why they had hated us before.
他们向我们解释为什么他们不喜欢我们的原因。
非限定性定语从句非限定性定语从句在形式上就与主句很松散，它与主句之间有一个逗点"，"隔开；它对其先行词没有限定、修饰的作用，只起补充、说明的作用。有时也用它来对全句进行补充、说明。即使将其去掉，也不会影响句子意思。由于上述原因，非限定性定语从句在表达意思方面也有别于限定性定语从句。另外，非限定性定语从句在中文译文里，我们往往将其作为一个分句处理，而不把它作定语翻译。 例如：Earlier , the Babylonians had attempted to map the world , but they presented it in the form of a flattened disc rather than a sphere , which was the form adopted by Ptolemy .
（此句中，非限定性定语从句是对先行词a sphere进行补充、说明。）
更早之前，巴比伦人曾试图绘制世界地图，但是他们把它绘制成平盘状而不是托勒密所采用的球体状。
The combination of satellites, which transmit information , computers , which store information , and television , which displays information , will change every home into an ecation and entertainment center .
（此句中，三个非限定性定语从句分别对三个先行词：satellites ，computers和television进行补充、说明。如果去掉这三个非限定性定语从句，那么句子可简化为：
The combination of satellites , computers and television will change every home into an ecation and entertainment center .）卫星能传输信息，计算机能储存信息，电视能显示信息，把这些手段结合起来可以使每个家庭都成为教育娱乐的中心。
The sun heats the earth , which makes it possible for plants to grow .（此句中，非限定性定语从句是对全句进行补充、说明,将全句表达的意思看成"一件事情）。太阳给予大地热，这就使植物的生长成为可能。
The old man has a son , who is in the army .（此句中，非限定性定语从句是对先行词son进行补充、说明。但本句所传达的信息是："这位老人只有一个儿子" 。如果将此句改写成限定性定语从句：
The old man has a son who is in the army . 那位老人有一个在部队工作的儿子。那么，限定性定语从句就要对先行词son进行限定、修饰。这样一来，句子所传达的信息就变成了："这位老人有一个儿子在部队工作，还有其他的儿子在干别的工作"。）那位老人有一个儿子，他在部队工作。他在部队工作。
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限定性定语从句与非限定性定语从句的区别
a) 非限定性定语从句和主句的关系不十分密切，朗读时先行词部分一般用降调并稍做
停顿，书写的时候多半用逗号分开。
b) 非限定性定语从句能够修饰整个句子，限定性定语从句则不能。
c) 非限定性定语从句与限定性定语从句的含义不一样，限定性定语从句是确指，而非
限定性定语从句是泛指。
d) 先行词为专有名词或者具有特指对象的名词时，一般要用到非限制性定语从句。
e) 在非限定性定语从句中，现行词指人的时候，关系代词只能是who,whom，不能用
that；先行词指物的时候，关系代词只能用which, 不能用that。
⑥ 英语语法中的定语从句
限制性和非限制性的判断很简单，看定语从句和修饰的词即先行词前有没有逗号版。有逗号就是非限制性定权从，没有逗号就是限制性定从。在定语从句，介词后面只能接关系代词。使用介词+关系代词结构时，关系代词只能是whom或which。介词的选择有两种情况，一是根据先行词的搭配习惯。例如：i will never forget the year in which i joined the army. 根据先行词year我们表示在哪一年用介词in. 我们如果把year改为date，在哪一天我们要用介词on.这个句子我们要这样说：i will never forget the date on which i joined the army. 二是根据定语从句中谓语动词的搭配习惯：如this is the book which i am looking for=this is the book for which i am looking . 寻找是look for。
⑦ 英语语法 定语从句
这明显是语法错误，书中例句是有问题的，因为从句完整，所以应该用关系副词when