from which与from where的区别
关于from which的用法比较好理解，这里主要说说from where的用法。from where主要有以下两个用法：
一：用于引导非限制性定语从句，在意义上相当于 and from there（从那儿）。如： He hid himself in a tree, from where he could see the enemy in the distance. 他躲在一棵树上，从那儿他可以看到远处的敌人。
We went up to the roof, from where we had a good view of the procession. 我们爬上屋顶，从那儿可以很好地观看游行。
二：可视为where前省略了the place，即这样用的from where 相当于from the place where，意思是“从……的地方”“离……的地方”。如：
From where I stood I could see everything clearly. 从我站的地方我一切都看得清清楚楚。
The car stopped short only a few inches from where I stood. 汽车在离我站的地方仅几英寸处突然停住。
The school was only a few blocks from where she lived. 学校离她的住所只有几个街区的距离。
若遇到前面是地点名词的先行词，如何判断用where还是from where还是from which?请看下面一个句子：
I have bought that house, _____I can enjoy the beautiful scene of Yangpu Bridge .
我们认为这道题填 where 和 from where 语法上都可以（但不宜填 from which），但两者在意义上稍有区别：
I have bought that house, where I can enjoy the beautiful scene of Yangpu Bridge. 我买下了那栋房子，在房子那可以欣赏到杨浦大桥的美景。
I have bought that house, from where I can enjoy the beautiful scene of Yangpu Bridge. 我买下了那栋房子，从房子那可以欣赏到杨浦大桥的美景。
在许多情况下，用不用 from 不会导致语法错误，但会导致语义变化（通常情况下是，如果没有 from，意思会不够明确和清楚）。比较：
He hid himself under the bed, from where he could hear what they were talking. 他躲在床下面，他可以从床下听到他们谈话。（句中的 from where 可理解为 from under the bed，意思是“从床下面”）
He hid himself under the bed, where he could hear what they were talking. 他躲在床下面，在床那儿他听到他们谈话。（句中的 where 可指为“在床边”“在床上”“在床下”等，意思不够明确。
在定语从句中，from where 和 from which 如何使用
She stood at the window, _______ she could see the park faraway.
from where是从某处......指大概的地方,
而from which是从哪个......指具体的东西, which 不能代替地点，时间及原因。
from 有具体含义，用from where更加生动，形象，具体，且符合英语习惯。
用where时，语义模糊。
1. They climbed to the top of the tower, from where they could see what was happening in the distance.
2. China is the birthplace of kites, from where kiteflying spread to Japan.
3. Soon after getting off his horse, the captain appeared at the second storey windows, from where he could see nothing but trees.
下马不久，上尉就出现在二楼的窗口了。他从那里除了树木什么也没看到. 划线部分相当于 and from at the windows…不可变为from which…，可用where，但不如用from where更具体
4. She climbed up to the top of the hill, from where she could have a good view of the whole town.
她登上山顶，从那里她可以一览全城风光。
划线部分相当于…, and from on the top of the hill或from on the top of which…, 不可变为from which，也可直接用where引导，但语义较为含糊，不如用from where更加生动、形象、具体
5. We went up to the roof , from where we had a good view of the procession.
我们爬到屋顶，在那儿我们可以一览整个行进队伍.
划线部分可理解为and from on the top of the roof或from on the top of which，用from which是不对的，直接用where仍显不具体，不形象。
6、China is the birth place of kites, from where kiteflying spread to Japan, Korea, Thailand and India.
中国是风筝的故乡，在那里风筝传到日本、朝鲜、泰国和印度。
这里from正与下文的spread to构成一个整体，可理解为from near/around this place，如若把from where换为 where显然是讲不通的，改成from which, 能够讲得通，但不太符合英语习惯。
7、The car stopped suddenly only a few inches from where I stood.
那辆小汽车就在我站的地方仅几英寸处忽然停下了。（引导状语从句）
这里的划线部分中where引导的是宾语从句，与from一起作地点状语从句。
特殊类型定语从句
1.Is this factory _______ we visited last year?
2.Is this the factory-------we visited last year?
A. where B in which C the one D which
分析：做1题首先要明白一个概念。被定语从句修饰的名词前一般都有the， 因为它已被限定。所以此题还原成陈述句应该是this factory is______ we visited last year. 而不是this is factory ______ we visited last year.不能选A, B, D。因为句子没有先行词。所以答案是C。从句前省略了关系代词that/which。 2题先行词是the factory,在从句中做宾语,关系代词that/which/省略．
3. This is the last time _________ I shall give you a lesson.
A. when B that C which D in which
分析：答案是B。此处time是次数。因此用that引导。
4.I don’t like the way ________ you laugh at her.
A . that B on which C which D as
分析：此题先行词是the way，是方式的意思,还原到定语从句中做状语 you laugh at her in the way。 关系代词可选用that/in which/省略
way/time的特殊用法
Way
当先行词是way意思为”方式.方法”的时候,引导定语从句的关系词有下列3种形式：
Way在从句中做宾语
The way that which he explained to us is quite simple.
Way在从句中做状语
The way that in which he explained the sentence to us is quite simple.
5.He didn’t understand the way----- I worked out the problem.
A which B in which C where D what
分析：还原the way到从句中,I worked out the problem in the way, 做状语,因此选择B ．
Time
当先行词是time时,若time表示次数时,应用关系代词that引导定语从句,that可以省略;
若time表示”一段时间”讲时,应用关系副词when或介词at/during + which引导定语从句
6.I could hardly remember how many times----I’ve failed.
A that B which C in which D when
分析：此处time表示次数,因此选择A
7.This is the second time--------the president has visited the country.
A which B where C that D in which
分析：此处time表示次数,因此选择C
8.This was at a time------there were no televisions, no computers or radios.
A what B when C which D that
分析：此处time指的是一段时间,曾经有一段时间,既没有电视,电脑,也没有收音机.因此选择B.
本文来源：https://www.2haoxitong.net/k/doc/71d36e310622192e453610661ed9ad51f01d548b.html
文档为doc格式