记得学习定语从句which与where
定语从句（也称关系从句、形容词性从句），是指一类由关系词（英语：relative word）引导的从句,因为这类从句的句法功能多是做定语，所以曾被称为定语从句（英语：attributive clause），这类从句除了可以做定语之外，还可以充当状语等其他成分，所以现代语言学多使用“关系从句”这一术语。以下是整理的定语从句which与where，供大家参考借鉴，希望可以帮助到有需要的朋友。
定语从句which与where1
which引导定语从句的时候,在从句中作主语,宾语或是表语，分享了定语从句which与where用法。
一、关系副词与“介词+which”互换的情形
当“介词+ which”在定语从句中作时间、地点和原因状语时，可以用相应的关系副词when, where和why来替换。
1. when根据情况可以等于in which, at which, on which等。如：
The day when (=on which) she arrived was Thursday. 她到的那天是星期四。
July and August are the months when (=in which) the weather is hot. 七八月是天气很热的月份。——摘自《英语常用词多用途词典》（金盾出版社）
这种替换有时出现在非限制性定语从句中。如：
We’ll put off the picnic until next week, when (=by then) the weather may be better. 我们将把野餐推迟到下星期，那时天气可能会好一点。——摘自《张道真英语语法》（商务印书馆）
2. where根据情况可以等于in which, at which, on which等。如：
This is the hotel where ( =in which / at which) they were staying. 这就是他们当时住的旅店。——摘自《英语常用词多用途词典》（金盾出版社）
Do you remember the place where (=at which) we had lunch? 你记得我们吃午饭的地方吗? ——摘自《英语用法指南》（外研社）
这种替换有时出现在非限制性定语从句中。如：
The Tower of London, where (=in which so many people lost their lives, is now a tourist attraction. 在伦敦塔中曾有许多人丧命，它现在是旅游胜地。——摘自《朗文英语语法》（外研社）
3. 关系副词若要换成“介词+which”只能是for which。如：
The reason why (=for which) I came here was to be with my family. 我到这里来的原因是要跟我的家里人在一起。——摘自《英语用法指南》（外研社）
My success in business, the reason why (=for which) he dislikes me, has been due to hard work. 他为我在事业上的成功而不喜欢我，我的成功归功于我努力工作。——摘自《朗文英语语法》（外研社）
但是，反过来，for which并不一定能换成why。如：
The documents for which they were searching have been recovered. 他们找寻的文件已经找到了。（此句中的for which也不能换成why，理由同上句）——摘自《高中英语语法详解》（湖南大学出版社）
二、关系副词与“介词+which”不能互换的情形
1. 有些语境需要用特定的介词来明确其关系，此时若换成关系副词，则会导致意思不明确或句意不能通顺。如：
The ladder on which I was standing began to slip. 我脚下的梯子开始向下滑动。（句中的on which不能换成where，否则意思不明确）
This I did at nine o’clock, after which I sat reading the paper. 九点钟时我做这事，之后我坐着看报。（句中的after which不能换成when，否则意思不明确）
2. 当“介词+which”后面接有被which修饰的名词时，通常不能用关系副词代替。如：
The programme will continue until 1994 by which time $3million will have been spent.
这个项目将持续到1994年。到那时开支将达到300万美元。（句中的by which time不能换成when或where，因为which后跟有它所修饰的名词time）——摘自《限定词与数量词》（外文出版社）
We arrived at noon, by which time the demonstration was over. 我们是中午到的，这时游业已结束。（句中的by which time不能换成when或where，因为which后跟有它所修饰的名词time）——摘自《英语常用词多用途词典》（金盾出版社）
3. 当“介词+which”并不表示时间、地点或原因时，自然不能换成关系副词。
There are three principal routes by which one can drive to North Wales. 开车到北威尔士，有3条主要路线可走。（句中的by which不能换成when或where，因为这里的by which并不表示时间或地点，介词by在此表示“通过”）——摘自《英语常用词多用途词典》（金盾出版社）
This is a subject about which we might argue for a long while. 这是一个我们可能长时间争论的`问题。（句中的about which不能换成when或where，因为这里的about which并不表示时间或地点，介词about在此表示“关于”，所涉及的搭配是argue about）——摘自《张道真英语语法
4、在表语从句和状语从句中不能互换
1.在表语从句中
Is this hotel ______ you said we were to stay in your letter？.
A. that B. where C. the one D. in which
此题可改为：This hotel is where you said we were to stay in your letter．实际上是由where引导的表语从句，答案为B项。
2.在状语从句中
We had better put the bottle of dleeping pills__kids can not find it in case they mistake the pills for candies.此句中“where”并非引导定语从句，而是引导地点状语从句，故不能用"in which".
若用"in which",那句子就变成了定语从句，
in which kids can not find...
= in the sleeping pill kids can not find...
句子就无法理解通了。
3.当定语从句带有不定式时，只能用prep.+which
如，I want a pen with which to write.
I live in a house in which to spend my rest life.
不能用 I live in a house where to spend my rest life.
定语从句which与where2
1、Soon after getting off his horse, the captain appeared at the second storey windows, fromwhere 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。(引导定语从句)
划线部分相当于…, and from at the windows…不可变为from which…，直接用where不如用from where更具体。
2、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。（引导定语从句）
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。
3、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。（引导定语从句）
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。
4、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。
5、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突然停下了。（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。
例句1:look over there!some people are standing under the big tree,___ you can enjoy the whole view. A.which B.from which C where D from where
分析:where代表under the tree这个地方，如果用which就只能代表the big tree,这句话的意思不是Enjoy the whole view from the big tree.而是from under the big tree.介词后接介词短语的例子还是常见的.实际上这个句子完整的应该是You can enjoy the whole view from the place under the big tree. the place被省略了。 该句属于定语从句。
例句2:He stood by the window, ______ he could see what was happening outside.
A. where B. which C. from which D. from where
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