1,who,whom,that
这些词代替指人,“whom”作宾语指人,“that”既可作主语又可作宾语（作宾语可以省略）,可以指人也可以指物.在从句中所起作用如下： （1）Is he the man who/that wants to see you?他是那个想见你的男人吗?（who/that在从句中作主语） （2）He is the man whom/ that I saw yesterday.他就是我昨天见的那个人.（whom/that在从句中作宾语） （3）The man whom you spoke to just now is our English teacher.你刚刚说话的那个男人是我们的英语老师.
2,Which 用来指人或物
(用作主语、宾语,作宾语时可以省略）,例如： （1）Prosperitywhich / that had neppearsin te.农村出现了前所未有的繁荣.（which / that在从句中作主语） （2）The package (which / that) you are carryingis about to come unwrapped.你拿那个包裹快要散开了.（which / that在从句中作宾语）
whose
(只用作定语) “whose”表示谁（可以为人也可以为物）的（东西） 例：A child whose parents are dead is called an arphan.双亲都死了的孩子叫做孤儿.（“whose”表示那个孩子的双亲） He lives in a room whose window faces south.他住的那个房子的窗户是朝南的.（“whose”表示那个房子的窗户） 关系代词：在句中作主语、宾语或定语. 1.that既可代表事物也可代表人,“which”代表事物；它们在从句中作主语或宾语,“that”在从句中作宾语时常可省略关系词,“which”在从省略.[eg：This is the book （which）you want.] 2.不及物动词+介词”的介词的宾语代词“wh”放在它原来的位置. 3.代表物时多这时的that常被省略； c）被形容词最高级修饰时；既有人又有物时； e）整个句中前面已有“which”,“wh”行 关系副词：在句中作状语 关系副词=介词+关系代词 why=for which where=in/ at/ on which（介词同先行词搭配） when=during/ on/ in/…… which（介词同先行词搭配） 1.“where”是关系代词,当然也不用“that”引导. By the time when you arrived in London,we had stayed there for two weeks.到你到达伦敦的时候,我们在那里已经待了两个星期. I still remember where I met the her for the first time.我仍然记得我第一次见到她. Each time when he goes to business trip,he brings a lot of living necessities,such as towels,soap,toothbrush etc.他每次出差都带来了生活必需品,如毛巾,肥皂,牙刷等其他东西. 3.当从句的逻辑主语是some,any,no,somebody,anybody,nobody,something,anything,everything或nothing时,常用“there is”开头. There is somebody here who wants to talk to you.这里有人要和你说话. 分作进一步说明,通常是引导词和先行词之间用逗号隔开,将从句拿掉后其他部分仍可成立.
