非限制性定语从句例句

定语从句有限制性和非限制性两种。限制性定语从句是先行词不可缺少的部分，去掉它主句意思往往不明确；非限制性定语从句是先行词的附加说明，去掉了也不会影响主句的意思，它与主句之间通常用逗号分开，将非限定性定语从句放在句子中间，其前后都需要用逗号隔开。

非限制性定语从句例句：

These apple trees, which I planted three years ago, have not borneany fruit.

这些苹果树是我三年前栽得，还没有结过果实。

She is an artist, which I am not.

她是一位艺术家，而我不是。

Water, which is a clear liquid, has many uses.

水是一种清澈的液体，有许多用途。

The two policemen were completely trusted, which in fact they were.

那两个警察完全受到信任，事实上，也真是如此。

She was very patient towards the children, which her husband seldom was.

她对孩子们很耐心，她丈夫却很少这样。

She is always careless, which we should not be.

她总是马虎大意，我们可不应该这样。

He said that he had never seen her before, which was not true.

他说以前从没见过她，这不是真的。

In the presence of so many people he was little tense, which was understandable.

在那么多人面前他有点紧张，这是可以理解的。

He may have acute appendicitis, in which case he will have to be operated on.

他可能得了急性盲肠炎，如果是这样，他就得动手术。

When deeply absorbed in work, which he often was, he would forget all about eating and sleeping.

他经常聚精会神地工作，这时他会废寝忘食。

限制性与非限制性的区别：

形式不同限定性定语从句主句和从句之间不用逗号隔开，口语中使用时也不停顿；而非限定性定语从句与主句之间通常有逗号隔开，口语中使用时有停顿。

功能不同限定性定语从句用于对先行词的意义进行修饰、限制和识别，如果去掉，就会造成句意不完整或概念不清；而非限定性定语从句用于对先行词起补充说明：

People who take physical exercise live longer.

进行体育锻炼的人活得长些。（若把从句去掉句子就失去意义）

His daughter, who is in Boston now, is coming home next week.

他女儿现在在波士顿，下星期回来。（若把从句去句子意义仍然完整）

翻译不同在翻译定语从句时，一般把限定性定语从句翻译在它所修饰的先行词之前，而把非限定性定语从句与主句分开：

He is the man whose car was stolen.他就是汽车被窃的那个人。

I've invited Jim,who lives in the next flat.我邀请了吉姆，他就住在隔壁。

含义不同比较下面的两个句子：

I have a sister who is a doctor.我有一个医生的姐姐。(（姐姐不止一个）

I have a sister,who is a doctor.我有一个姐姐,她是当医生的。（只有一个姐姐）