【简明语法】18.1 关系代词引导的定语从句

　　关系代词所代替的先行词是人或物的名词或代词，并在句中充当主语、宾语、定语等成分。关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保持一致。
1）who, whom, that
　 这些词代替的先行词是人的名词或代词，在从句中所起作用如下：
　 Is he the man who/that wants to see you?
他就是想见你的人吗？（who/that在从句中作主语）
　 He is the man whom/ that I saw yesterday.
他就是我昨天见的那个人。（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互换）, 例如：
　 They rushed over to help the man whose car had broken¹ down.　 那人车坏了，大家都跑过去帮忙。
　 Please pass me the book whose (of which) cover is green.　请递给我那本绿皮的书。

3）which, that
　　它们所代替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 prosperity² which / that had never been seen before appears in the countryside. 农村出现了前所未有的繁荣。（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）

1 broken   

adj.坏掉的，患病的，被制服的，断掉的；vbl.break的过去分词

参考例句：

• He is mending a broken cup.他在修补破杯子。
• Something was broken in my engine.我的发动机里有个东西损坏了。

2 prosperity   

n.繁荣，昌盛，成功

参考例句：

• I wish you the life of happiness and prosperity. 我祝你生活幸福、万事如意。
• A prosperity never seen before appeared in the countryside.农村出现了前所未有的繁荣。