Where 和. In Which 与. Wherein的对比
Where和wherein看起来和听起来相似，但实际上它们有不同的含义。事实上，where可以是In which的另一种说法。
但是你怎么知道什么时候使用它们呢?
在这里，我们将讨论where、in which和wherein的定义，解释三者之间的区别，并让您知道何时应该使用其中一种。我们还将提供如何使用这三者的示例。
定义 where 和 in which 以及 wherein
Where: Where可以是副词也可以是连词。它用作副词修饰形容词、动词或另一个副词。作为连词，where可以在句子中用来表示在某地或在某种情况下。连词是将其他单词、从句或短语连接在一起形成复合句或复杂句的单词。你也可以用它作为连词来连接两个句子或从句，例如:
She lives in a neighborhood where everyone puts up holiday decorations.
He only purchases avocados from Mexico, where they grow year-round.
In which: In which是介词In和关系代词which的组合。当它们一起使用时，可以组成关系代词来指代主语的地点或时间。In which也可以用作疑问句代词，代替where一词。
We went to the house on the top of the hill, in which we made many childhood memories.
In which hotel are they staying?
Wherein: Wherein 可以是副词或连词。作为副词，它本质上是指以何种方式或如何。作为连词，它的定义是 in which。
Wherein was I wrong for putting pineapples on my pizza?
Please refer to Exhibit C, wherein the terms of the contract are enumerated.
什么时候用 where ， in which 和 wherein?
Where
当你试图指出一个主题的方位或位置时，使用where。Where也可以用作疑问句副词，当你试图询问某人主语的位置时。
如果你把它用作疑问句副词，要确保句子的动词在主语之前。
We went back to the restaurant where we had our first date.
Where is the nearest gas station?
Where也可以用来指一种情况或环境的状态。
Where do you see this relationship going?
He took a plane to Morocco, where he met his cousin for the first time.
有时你会看到或听到有人用where代替when，但在写作中应该避免这种情况。例如，在前面的句子中，人们可能会说，“可能有时间在哪里…”，但因为我们谈论的是时间而不是地点，所以我们用when。
In which
关系代词，用于连接关系从句和独立子句，通常放在主语后面。提醒一下，关系从句有时也被称为形容词从句，因为它们描述的是一个主语。
Sherlock had come to a halt in his investigation, in which he was trying to figure out who had stolen the king’s crown.
有些作者可以互换使用where和in which，虽然这样做在语法上可能是正确的，但在提到一个地方时应该使用where，因为它是所谓的位置—一个指示位置的单词。然而，在为更正式的读者写作时，这可能是一个更好的选择。
只有在需要指定某个对象的位置时才可能使用 in which而不是where。例如:
This is the cabinet where I keep all of my trinkets.
从这句话中我们不清楚这些小饰品是在柜子上还是在里面。我们可以用in which代替where来澄清这一点。
This is the cabinet in which I keep all my trinkets.
上面这句话说明了饰品是放在柜子里面而不是柜子上面的。
Wherein
虽然这个词wherein可以用来代替where或in what way，但最好避免使用，因为它已经过时了，在日常英语中已经不再使用。它在莎士比亚时代很流行，在现代的法律文件中也有出现，但你很少听到有人在对话或写作中使用它。
Where 和 in which 以及 wherein 的例子
This is the house where I grew up.
Jack dreamed of returning to England, where he had once studied.
Where there’s smoke, there’s fire.
Paul put a lot of thought into his book, in which he had written about his walk across the Andes.
In which house do the McCallisters live?
After talking to my sister, I realized wherein I was wrong.
Atlanta was the city wherein John spent most of his formative years.
