2.指物的关系代词which和that的用法：
　　(1)作主语
　　This is the instruction manual which/that tells you how to operate the computer.
　　这是那本教你如何操作计算机的说明手册。
　　(2)作宾语包括作介词宾馆。此种情况下的关系代词可以省略：
　　The chair (which /that) you broke yesterday is now being repaired.
　　你昨天弄坏的那把椅子现在正在修理。
　　The film (which/that) I saw last night was about a soldier who fought in WWII.
　　我昨天晚上看的那部电影是关于一个在二战中打过仗的士兵的。
　　(本句有两个定语从句。)
　　This is the bike for which I paid $ 100.
　　这就是我花了100美元买的那辆自行车。
　　The car(which/that)he went in was a black Cadillac.
　　他坐在里面走了的那辆汽车是一辆黑色的卡迪拉克。
　　The accounts of the company, (which/that) I’ve been paying great attention to, are in balance.
　　我一直非常注意的公司账目，是保持平衡的。
　　3.whose 和of which 指代人或事物，作定语。of which 可用whose 代替;
　　The car whose lights (of which the lights/the lights of which) were all broken was my father’s.
　　那辆所有的灯都破了的汽车是我父亲的。
　　例：His house of which the windows (the windows of which /whose windows) were all broken was a depressing sight.
　　他那所有窗户都坏了的房子真是目不忍睹。
　　That is the book whose cover (ofwhich the cover/the cover of which ) was broken.
　　这就是那本封皮破了的书。