on which与in which的区别

on which通常表示在某个位置或具体时间的某一天，而in which则侧重于表示一种所属关系或场合、情况。

on which 与in which 的区别

一、指代不同

1、in which：在其中。

2、on which：哪个。

二、侧重点不同

1、in which：侧重于表示一种所属关系。

2、on which：侧重于表示一种目的关系。

三、引证用法不同

1、in which：which用作疑问代词时，在特殊疑问句中用作宾语或主语。

2、on which：which用作关系代词，可引导限制性定语从句或非限制性定语从句。

四、用法不同

“on which”和“in which”都可以用来引导定语从句，修饰先行词，区别在于介词的使用，取决于先行词的搭配，例如“The hotel, on which we stayed last year, was very comfortable ”（我们去年住的酒店非常舒适）。

而“in which”通常表示在某个场合或情况下，例如“The house, in which he grew up, was very old and beautiful”（他成长起来的房子非常古老而美丽）。

介词加which的用法

1.in which 在……里面  

The school (that/which) he once studied in is very famous.    

= The school in which he once studied is very famous.   

2.for which 为了……目的  Tomorrow I will bring here a magazine (that/which) you asked for.   

= Tomorrow I will bring here a magazine for which you asked.   

3.on which 在……的上面或具体时间的某一天  

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.at which 在……里面或在……上面  

The dumpling House which he often has dumplings at is very popular.   

= The dumpling House is very popular, at which he often has dumplings.

which放在句首是什么意思

当"which"置于句首时，通常是为了引导一个非限定性定语从句，用于进一步描述或解释先行词（即在主句中出现的名词）。

非限定性定语从句用来提供关于先行词的额外信息，但并不对先行词进行限定。这通常与使用"that"引导的限定性定语从句形成对比。

以下是一个示例：

主句：I bought a new car.

非限定性定语从句：which is blue.

合并后的句子：I bought a new car, which is blue.

在这个例子中，"which"引导的非限定性定语从句："which is blue"提供了对"car"的额外描述，即它是蓝色的。整个句子的意思是，主语购买了一辆新车，而且这辆车是蓝色的。

需要注意的是，非限定性定语从句常常使用逗号与主句隔开，在句子中起到补充说明的作用。而限定性定语从句则没有逗号，对先行词进行限定，意义上更为必要。