全国大众英语测验语法——干系代词指导的定语从句
干系代词所替代的先行词是人或物的名词或代词，并在句中充当主语、宾语、定语等身分。干系代词在定语从句中作主语时，从句谓语动词的人称和数要和先行词连结同等。
1）who, whom, that这些词替代的先行词是人的名词或代词，在从句中所起感化如下：
Is he the man who/that wants to see you?他便是想见你的人吗？（who/that在从句中作主语）
He is the man whom/ that I saw yesterday.他便是我昨天见的那团体。（whom/that在从句中作宾语）
2) Whose用来指人或物，(只用作定语,若指物，它还可以同of which交换）,例如：
They rushed over to help the man whose car had broken down.那人车坏了，巨匠都跑过往帮助。
Please pass me the book whose (of which) cover is green.请递给我那本绿皮的书。
3）which, that
它们所替代的先行词是事物的名词或代词，在从句中可作主语、宾语等，例如：
A prosperity which / that had never been seen before appears in the countryside.乡村出现了史无前例的昌盛。（which / that在句中作宾语）
The package (which / that) you are carrying is about to come unwrapped.你拿的包快散了。(which / that在句中作宾语）

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