一、修饰整个主句

1. The movie, which was released last year, won several awards.

（去年上映的这部电影赢得了好几个奖项。）

2. The news that the company will expand overseas surprised everyone.

（公司计划海外扩张的消息让所有人都感到惊讶。）

二、修饰主句部分内容

1. The book, which I borrowed from the library, is very interesting.

（我从图书馆借的那本书非常有趣。）

2. The city, which is known for its history, attracts many tourists.

（以历史闻名的这座城市吸引了许多游客。）

三、关系代词用法

主语：which

The problem, which we discussed earlier, needs to be solved immediately.

（我们早些讨论的问题需要立即解决。）

宾语：which

The song, which was performed at the concert, moved the audience.

（在音乐会上表演的那首歌感动了观众。）

定语：which

The students, which are from different countries, participated in the competition.

（来自不同国家的这些学生参加了比赛。）

四、特殊用法

当先行词为整个主句时，which可置于句首或句尾：

句首：

As is reported, the company has launched a new product.

（据报道，公司推出了一款新产品。）

句尾：

The movie, which everyone watched, was a box office hit.

（每个人都看了的那部电影大获成功。）

注意事项：

1. 非限制性定语从句与主句间用逗号隔开；

2. 从句中关系代词不可用that；

3. 当先行词为整个主句时，which可作主语、宾语或表语。

通过以上例句，可清晰理解“which”在非限制性定语从句中的灵活用法。