why 和for which 在定语从句中一样么

其实就是一般的限定性定语从句
至于前面的介词取决于主句中的动词
比如this is the pen by which i wrote compisition
不能呆板于介词＋which是何用法

关系副词=介词+which,是由从句部分的不及物动词应该加什么宾语决定该用什么介词的.例如简单句：She lived there. She lived in that house.这两句中的live都是不及物动词,因此想要在这个词后面...

有一些原子序数没有已知的对应元素.
（可能是用某些实验得出了一个元素的atomic number 结果找不到已知相应的元素 那么有可能就是发现了一种新元素 或者实验错误）
讲的繁琐一点就是
there have been atomic numbers[←我觉得应该要有s],and there's no known element for such atomic numbers.
atomic number和element之间介词用for
在这个which的定语从句里面 就把介词放到which之前
有问题就追问吧

1.先行词是“reason”
关系副词why在从句中做原因状语,可以用that替换,也可以省略.
In fact,that is the reason (why) I’m here to see you.
事实上这是我来见你的原因.
Please tell me the reason why you were absent.
请告诉我你为什么缺席.
This is the reason (that) he came.
这就是他来这儿的理由.
why=for which
2.此题应填as.
这里是such...as这个短语的应用.
3.选C.
这句话的主干部分是：The day came.完整的是：The day [(that)we all looked forward to] came [at last].意思是：[我们期待的]那一天[终于]到来了.
中括号里的内容都是修饰成分.
look forward to 介词to不能省略,而且这句话时态是过去式
4.选D.
这道题跟上面那道题是一样的道理.主干是：the thoery proved to be true.完整的是：The thoery [(that)he had stuck to] proved to be true.意思是:他坚持的那个理论被证明是对的.
语言点是stick to和prove.to不能省略,而prove则是主动表被动.
5.选C.
考定语从句.(以前我经常错）
把这句疑问句换为陈述句（比较容易分析）,则是：This is the museum __ we visited last year.意思是：这是我们去年参观的那个博物馆.
where=in/ at/ on/ ...which (介词同先行词搭配),但是在这里不提问地点,所以A,B不可以.
如果这句话是：This museum is___ we visisted last year.则要用the one来代the museum.
但是在题目中,只能用which/that来引导定语从句,所以选C.

定语从句 介词提前+which=why 相当于 关系副词why he was late again

这些都是定语从句里面,由which引导的定语从句,介词提前.
in which 可以翻译成在.里面
for which 可以翻译成为了.目的
on whch 可以翻译成在.的上面
at which 可以翻译成在.里面或在.上面
这些介词的使用除了意思上的区别,具体是要以which引导的从句而定的
例如 (1) The school (that/which) he once studied in is very famous."
　　= The school in which he once studied is very famous.　
(2) Tomorrow I will bring here a magazine (that/which) you asked for. 　　
= Tomorrow I will bring here a magazine for which you asked. 　　
(3) I have a dresser in my bedroom, which there are many cosmetics on.
= I have a dresser in my bedroom on which there are many cosmetics.
（4 ) The dumpling House which he often has dumplings at is very popular.
= The dumpling House is very popular, at which he often has dumplings.
当然这只是介词作为基本意思的用法,还有一些固定搭配,得具体情况具体分析.
例如 The plane may be several hours late,in which case there's no point in our waiting.
（固定搭配：in the case)
The speaker paused to examine his notes,at which point a loud crash was heard.
( 固定搭配：at the point)
Ten years of hard work changed her greatly,for which reason he could hardly recognize her at first sight. (固定搭配：for the reason)

which 前面用in 、for、on还是at,取决于which指代主语中的那个词.
例如：
The court is one of the few institutions in which people have to do some elitethinking.
(在像最高法院这类为数不多的机构里,人们必须做一些精英化的思考.)
这里in which=in the court, in the court 你能理解吧,根据句意和语法肯定不能用for the court 或on the court 和at the court

why是关系副词 ,而for which 是介词＋which结构 关系副词含义相当于＂介词＋which结构＂,因此常常和＂介词＋which＂结构互换 其中 关系副词有：when,where ,why 介词＋which结构有： when =in/on which ,where=in/at which ,why =for which 对了 是在定语从句中的...

是的

区别不在本身
得看你用语句子的时候后面的动词后跟着带的是什么动词,这个动词又是跟的什么介词
比如at which he can stay

一般在介词后的从句引导词只能是which,但一般介词+which可以用其他wh-代替,比如in which表示地点,所以可以用where代替
第二句中的reason有两种搭配形式：
the reason why——这就是.的原因,是针对前面的疑问或情况进行阐述,表明最直接,最主要的原因.
the reason that——原因是,表示一部分或全部原因,可以是直接的也可以是间接的次要原因.
why和that都引导了reason的定语从句,但是一般我们从句意上分析,如果表示的是“做什么事的原因”之类,就用why；如果是“事情本身引起的原因”之类,就用that.
因此,第二句中的for which可以用why代替

这个是根据句中前面的具体词来决定是in which,at which,for which或at which的,因为前面的名词、动词等都有相应的搭配词,也有时候地点,用at,是原因等用for,像你举得这个例子是in which是因为前面的the same way ,in the same way 是固定搭配,表示用同样的方式

选A.
which在限制性定语从句中就是指先行词,如题中的which就指先行词the day,在从句中作动词forget的宾语.
"介词+which"不能只从意思上区别,介词的选择主要有3方面
1,考虑先行词与介词的固定搭配.
This is the farm on which he is working .
on the farm 是固定搭配.
2,考虑句意的需要.
This is a factory into which he wants to go .
go into the factory .
He is one of my friends with whom i am living .
live with sb .
3, 考虑 定语从句谓语动词的固定短语所需什么介词.（这种情况尤为多些）
This is a book in which i am interested .
be interested in sth .

这个用法是不对的,原因有2（最主要是第二个原因）.

1）but后面的句子可以看作是另一个独立的句子,只是用逗号断句了.
而which语句作从句应该是整个句子的一部分,在句子中作修饰成分.
这样写比较好：
Type 1 is a much faster and efficient solution, for which the hardware requirements are more costly.
这里之所以把 than Type 2 去掉了,是因为第二个原因.
2）which在这里所指不明,可以是Type 1也可以是Type 2.

所以,最后的建议还是拆分句子,分成两条语句来写.有时短句表达更为清晰.
Type 1 is a much faster and efficient solution than Type 2. However, the hardware requirements for it are more costly.
这里的it就是指上个句子的主语Type 1,语义具有延续性,不容易搞混的,不像which从句用于修饰时往往有就近原则的困扰.

for后面跟的是原因.for which 表示 earth attracts matter的原因是引力.
选b或d 是说 地球用“力”来吸引物质,显然不对,地球吸引物质是因为“力” 而不是用“力”,“力”是一个虚拟的概念吗,是物质被吸引的原因.

因为这是原因定语从句,要用for which

where 可以引导所有类型的从句,只有在它引导定语从句时 才可能
和in which 替换,其他时候都不行.这取决于先行词与介词的搭配：
This is the village where / in which I was born.
This is the village where / from which he joined the army.
This is the shool gate where / at which we met the other day.
I was born in the village.
He joined the army from the village.
We met at the school gate the other day.
at which是不是=when：是否选择when还是使用at which是有效性错误的问题,时态才是关键,
但是日常做题目的时候可以这样理解这个考点：时间状语后面比如year,age,通常用when修饰,但是 介词+which的修饰更优,往往更清晰.
for which是不是=why：很抱歉 我没查到他们的区别 而我自己又认为他们没什么区别 他们可以互换
why是关系副词 ,而for which 是介词＋which结构
关系副词含义相当于＂介词＋which结构＂,因此常常和＂介词＋which＂结构互换
其中
关系副词有：when,where ,why
介词＋which结构有：
when =in/on which ,where=in/at which ,why =for which
对了 是在定语从句中的...

for which it had been designed 是修饰the coal mines的定语从句.试着把介词for放到定语从句的末尾理解一下?
即:...it could not be employed outside the coal mines it had been designed for
还可以把原句拆分为两句来理解;
.it could not be employed outside the coal mines.it had been designed for the coal mines.

in which=where
for which=why

...anything for which he has unlimited enthusiasm = 对谋事感无限兴趣的人一定能成功
all servlets for which you’ve specified a mapping in the DD = for which 表示目的,指那些servlets；
还有 为哪个 的意思 和 due to which 的意思呢：and X was his specialty for which he was famous worldwide

首先,你所列举的这些一般都出现在which引导的定语从句中.
for which一般表示原因
in which一般表示地点或方位等
of which,with which,to which这些要看后面从句中不及物动词的具体意思而定
不是不及物动词的后面没加介词,而是把这些介词提前了,提到了which的前面
因为英语的习惯是先表明要表达的意思,有时候句子很长,所以把介词提前,避免头重脚轻,也可以先提示读者后面的意思

第一个,从句里面attract for 是固定搭配 吸引的意思
第二个是从句在句子中作状语成分,加介词in

A.for which =why 为什么的意思 Awhich引导非限制性定语从句,指代整个主句的内容 他们邀请我去参加晚会,这正好 B他开始为下一学期的那天最终来了,that引导定语从句,修饰the day

前提是在定语从句中,关键要讨论先行词是时间还是地点.但是有些引导词是不能替换的：例如：by which,from which----因为这些介词本身就有意义了,就不能像when、where这样只替代先行词的意义了.
能替代的,可以互换的往往是前几个常见的：例如--at which = when、where

根据句中的谓语动词辨别就可以了
只是介词前置而已
也就是说前面的介词取决于主句中的动词
很简单
如
in which
The building in which he studied was very old.
实际上是study in the building将in前置
这句子可以分成两句
He studied in the building.
The building was very old.
限制性定语从句就是把这两个句子合成一句
同理 for which
The picture for which he paid $1,000 was once owned by a duke.
pay for 将 for前置

定语从句,先行词“day”在从句中作宾语
I'll never forget “the day”用which
which指代物,一个物品 最为常用.
in/on which=where 视具体地点而定、可以翻译成在……里面、
在……的上面for which=why 表示原因、可以翻译成为了……目的
of which 指代在……（可能是一个集团等）之中.
在非限制性定从中,which最为常用,可以指代一整句句子而非一个东西或单元.

你确定正确答案不是A.where?
你答案看错了吧?
如果答案真的是B,那你的原句a place后就少了个介词in
which,in which,on which,for which,by which——你说的这些全部都是在定语从句中出现的吧?这些介词并不是和which形成固定搭配,而是和which前的先行词搭配的
就说这句（如果你句子抄错了的话）A shopping center is a place in ____many different shops and stores are collected under one roof.
这里的which实际上就是指place这个词,在从句中为了避免重复而用了which引导下面的从句,也就是place的修饰语部分.
如果你没有抄错句子的话,这句话应该选A.where=in which（也即in the place）
再拿这个题问一下你的老师.你的老师可能忙中有错.我们静等他的解释.

We didn't visit the Great Wall for the weather of which was bad

一般来说可以互换,
但是,
why不能引导非限制性定语从句,所以这时候要用for which.
例句：I had told him the reason, for which I didn`t attend the class.
不能用why.