A 主格
用which，这里不需要that：
That block，Which cosplayt￡5 million to build，has been empty fof years．
那个街区，就是花费了500万英镑建起来的那个，已经空置了多年了。
The 8∶15 train，which is usually very punctual，was late today．
8点15分的列车一般是正点的，今天晚点了。
口语中总是可能这么说：
That block cosplayt￡5 million to build and has been empty for years．
那个街区花费了500万英镑建成，已经空置了多年了。
This 8∶15 train is usually punctual，but It was late today．
8点15分的列车一般一直正点的，但今天晚点了。
B 宾格
用which，这里不需要that，而且which决不可以省略：
She gave me this jumper，which she had knitted herself．
她送给我这件羊毛衫，这是她亲手织的。或：
She gave me this jumper；she had knitted it herself．These books，which you can get at any bookshop，will give you all the in- formation you need．
这几本书，你可以在任何书店买到的，会向你提供你所需要的所有资料。或：
These books will give you all the information you need．You can get them at any bookshop．
C 介词的宾语
介词坐落于which之前或者坐落于从句之后，但不那样正式：
Ashdown Forest，through which well be driving，isnt a forest any longer．
阿斯顿森林，大家马上驱车通过，已经不再是森林了。或：
Ashdown Forest，which well be driving through，isnt a forest any longer．
His house，for which he paid￡10，000，is now worth￡50，000．
他花了一万英镑买的房屋，目前值五万英镑。或：
His house，which he paid￡10，000 for，is now
D 与短语动词连用的which
像下面的短语动词look after，look forward to，put up with（参见第三十八章）都应被看做一个整体，即介词/副词不应与动词分开：
This machine，which I have looked after for twenty years，is still working perfectly1．
这台机器我已经照管了20年，目前仍然没一点儿问题。
Your inefficiency，which we have put up with far too long，is beginning to annoy our customers．
大家对你的不称职容忍得太久，而客户也开始对此感到不认可了。
E 所有格
用whose或of which。
whose一般用来指动物和事物，of which可以用来指物，但
除在非常正式的英语中以外，比较罕见。
His house，whose windows were all broken，was a depressing sight．
他的房屋窗户无一完好，一派让人心酸的景象。
The car，whose handbrake wasnt very reliable，began to slide backwards2．
那辆车的手闸不太靠谱，车开始向后滑动。
