which 一般是用在从句当中 或者疑问句中
疑问句很好理解
Which do you like best?
你最喜欢哪一个?
which 一般是引导非限制性定语从句
We have eliminated all statistical tables, which are of interest only to the specialist.
我们删去了全部统计表格,因只有专家才对这些表格感兴趣.
If you can hit him on his eye he will strike out wildly,which would exhaust his strength.
如果你能击中他的眼睛,他就会凶猛地进行反扑,这样就会耗尽他的体力.
见参考资料
where用作关系副词,引导定语从句: (=in which）
where 的用法
【用法1】 where用作疑问副词, 在(往、从)哪里, 在什么地方:
Where are you? 你在哪儿?
Where did you get the computer (form)? 你从哪儿弄到这台电脑的?
Where did you study medicine? 你从哪儿学的医?
【用法2】where用作连接副词, 引导下列从句：
Where bees are, there is honey. 〔状语从句〕哪儿有蜜蜂哪儿就有蜜.
I’m going to do what I like and go where I like. 〔状语从句〕我要做我想做的事,去我想去的地方.
I wonder where she lives. 〔宾语从句〕我想知道她住在哪里.
It’s really no business of yours where I spend my summer. 〔主语从句〕
我真不知道她去哪儿了.
I really have no idea where she has gone.〔同位语从句〕我真不知道她去哪儿了.
The problem is where we should put the vase. 〔表语从句〕问题是我们把花瓶放在哪里呢.
【用法3】where用作关系副词,引导定语从句: (=in which）
England is one of the few countries where (=in which) people drive on the left. 英国是少数沿左侧开车的国家之一.
We then moved to Paris, where we lived for six years. 我们后来搬到巴黎,在那里住了六年.
【用法4】where用于引申意义:
Where will all this trouble lead? ( =What result will it have? ) 这件麻烦的事会惹出什么结果?
The crisis has reached a point where the receiver will have to be called in.危机已经到达非把破产管理人叫来不可的地步.
Where others are weak, he is strong. 别人的弱点正是他的优势.
Where the money is, there’s the power. 有钱就有势.
Can you succeed where others failed? 别人干砸的事情, 你能干成吗?
【用法5】where引导名词性从句,相当于the place （point）where：
A bird had settled on a tree close to where I was standing. 鸟儿栖息在离我站的地方很近的一棵树上.
That’s where the battle took place. 那儿就是那场战役发生的地方.
The car is where you parked it. 车子还在你停放的地方.
That’s where we differ. 这就是我们的分歧所在.
That’s just where we basically disagree with him. 这就是我们同他的根本分歧点.
This is where we help each other. 我们就在这方面互相帮助.
