定语从句作为英语语法，在学习过程中属于中较难理解与掌握的部分，也正是由于其复杂程度较高、逻辑性较强、理解难度很大，屡屡让童鞋们在考试中丢分数、失信心、丧斗志！
如果你对这一部分的内容不太熟悉的话，一定要好好看看这篇文章！
定语从句的10个难点
7.介词+关系代词
★该结构的关系代词只有两种即介词+which（指物）介词+whom（指人）
★该结构介词的选用原则：
(1)根据定语从句中谓语动词的习惯搭配
This is the book on which I spent$8.
This is the book for which I paid$8.
(2)根据先行词的搭配习惯
I remember the days during which I lived there.
I remember the day on which I graduated from university.
(3)根据整个句子所表达的意思来决定
The colorless gas without which we can’t live is called oxygen.
(4)英语中为了强调某一名词，不定式前面也可以加上关系代词。
Here is the money with which to buy the piano.
She is the right person on whom to depend
注意：
①如果介词后移，关系代词可以省略
The person(whom/who/that)you will write to is Todd.
②有些含有介词的动词短语介词不能提前如look for/after;take care of;send for;hear from/of/about deal with等
This is the baby that you will look after.
8.定语从句的主谓一致
(1)当先行词是one of+复数名词，定语从句的位于动词要用复数形式
The Great Wall is one of the world-famous buildings that draw lots of visitor every year.
(2)当先行词是the only+one of+复数名词，从句谓语用单数形式
The Great Wall is the only one of the buildings on the earth that is seen from the moon.
(3)先行词如果是整个句子，定语从句的谓语动词用单数
Great changes have taken place in China,as is known to all.
He has passed the driving test,which surprises all of us.
9.定语从句的转化
定语从句可以转换为–ing或-ed形式
The girl(who is)dancing now just returned from Taiwan.
I love the stories(which were)written by Hemingway.
The man(who stands)standing there is my friend.
10.定语从句的解题方法
(1)判断从句是否为定语从句（先行词，关系词，定语从句）
(2)准确判断先行词在定语从句中的成分(主、宾、表、定、状)从而正确选定使用关系代词或关系副词
注意：
①关系代词whose的用法。Whose在定语从句中做定语。
当先行词是人：whose=the+名词+of whom
当先行词是物：whose=the+名词+of which
Do you know the boy whose parents/the parents of whom are on holiday?
I’d like a room whose window/the window of which faces the sea.
②That引导定语从句，名词性从句和强调句型的区别:
定语从句中的that:关系代词，在后面的定语从句中做句子成分。
名词性从句中的that：从属连词，只起连接主从句的作用，在从句中不做句子成分。
强调句中的that,运用于it is/was…that..结构；判断标准：去掉强调句型结构，成分仍然完整。
比较：
This is the book that I am looking for.
(that引导定语从句)
It is at Bashu middle school that I have studied for three years.
(that和前面的it is构成强调句型)
The fact that he stole the money surprised all of us.
(that引导名词性从句--同位语从句)
That he will come to the conference has excited all of us.
(that引导名词性从句--主语从句)
We all expect that they win,for members of their team are stronger.
(that引导名词性从句--宾语从句)
The reason for your failure is that you lack confidence in yourself.
(that引导名词性从句--表语从句
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