七、举例说明：  who 在从句中作主语）

I met someone who said he knew you．

我碰到了说自己认识你的一个人。 （

Yesterday I met the girl who studies in Beijing.

昨天我遇到在北京读书的那个女孩。

Succeed will come to him who is honest and diligent.

成功将归于诚实而勤奋的人。

He is the man who I saw in the park yesterday.

他就是我昨天在公园里见到的那个人。（who 在从句中作宾语）

He is the man whom I saw in the park yesterday.

他就是我昨天在公园里见到的那个人。（whom在从句中作宾语）

作宾语用的引导词可以省略，因此上面的句子可以改写如下：

He is the man I saw in the park yesterday.

Please pass me the book whose cover is green. 

请递给我那本绿皮的书。

They rushed over to help the man whose car had broken down. 

那人车坏了，他们跑过去帮忙。

They needed a plant which didn't need as much water as rice.

他们需要一种不像水稻那么需要水的作物。（作主语）

The farm (which) we visited yesterday is located in the suburb of Beijing.

我们昨天参观的农场位于北京郊区。（作宾语，可省略。）

Have you everything (that) you need?

你要的东西都有了吗？（作宾语，可省略。）

Is there anything (that) I can do for you?

有什么事要我做吗？（作宾语，可省略。）

This is the best film (that) I have ever seen.

这是我看过的电影中最好的一部。（作宾语，可省略。）

更多 定语从句讲解

　　http://www.tingclass.net/list-113-1.html