关系代词有：who, whom, whose, that, which等。
关系副词有：when, where, why等。
1、修饰人：who, whom, that
Is he the man who/that wants to see you? 他就是想见你的人吗？（作主语）
He is the man whom/ that I saw yesterday. 他就是我昨天见的那个人。（作宾语）
A prosperity which / that had never been seen before appears in the countryside. 农村出现了前所未有的繁荣。（作宾语）
The package which / that you are carrying is about to come unwrapped. 你拿的包快散了。（作宾语）
The package you are carrying is about to come unwrapped. 你拿的包快散了。（可以省略which / that）
3、“……的”：whose / of which
They rushed over to help the man whose car had broken 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。
When, where, why，相当于”介词+ which”结构：
Do you remember the day when / on which you joined our club? 还记得你加入我们俱乐部的那一天吗？
Beijing is the place where / in which I was born. 北京是我的出生地。
Is this the reason why / for which he refused our offer? 这就是他拒绝我们帮助他的理由吗？
as和which可代整个主句，相当于and this或and that。
As we know, smoking is harmful to one’s health. 如我们所知，吸烟有害健康。
The sun heats the earth, which is very important to us. 太阳使地球暖起来，这对我们人类很重要。
Everyone who gains wisdom is the one who is filled with the Holy Spirit.
Is he the gospel friend whom you invited?
An increase which has never seen before appears in the number of saints participating the church life during the Khmer New Year.
The prophecy draft that you have written is similar to mine.
We could not contact that brother whose motorcycle was lost.
We need to repair the motorcycle of which the brake is broken.
Mary still remembers the day when she was saved.
We need to proclaim that Seam Reap is just the first station where we propagate.
The epidemic should not be the reason why we are loose in shepherding.
Christ is wisdom to us from God, which should be our daily experience.