1、He laughed at the girl .The girl's hair was yellow.
2、He laughed at the girl whose hair was yellow.
3、The film which(that) we saw last night was quite moving. （二）定语从句简介： 定语从句，一个简单句跟在一名词或代词后（先行词）进行修饰限定，就叫做定语从句。在主句中充当定语成分。被修饰的词叫先行词。定语从句不同于单词作定语的情况，它通常只能放在被修饰的词（即先行词）之后。 定语 从句由关系词（关系代词、关系副词）引导，关系代词、关系副词位于定语从句句首。 定义 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 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。 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 prosperitywhich / thathad never been seen before appears in the countryside. 农村出现了前所未 有的繁荣。（which / that在句中作主语） The packagewhich / thatyou are carrying is about to come unwrapped. 你拿的包快散了。(which / that 在句中作宾语） ②关系副词引导的定语从句 关系副词可代替的先行词是时间、地点或理由的名词，在从句中作状语。 1）when, where, why 关系副词when, where, why的含义相当于"介词+ which"结构，因此常常和"介词+ which"结构交替使用，例 如： There are occasions when (on which) one must yield. 任何人都有不得不屈服的时候。 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？ 2）that代替关系副词 that可以用于表示时间、地点、方式、理由的名词后取代when, where, why和"介词+ which"引导的定语从 句，在非正式文体中that常被省略（正式文体中不可省略），例如： His father died the year (that / when / in which) he was born. 他父亲在他出生那年逝世了。 He is unlikely to find the place (that / where / in which) he lived forty years ago. 他不大可能找到他四十 年前居住过的地方。 ③判断关系代词与关系副词 方法一： 用关系代词，还是关系副词完全取决于从句中的谓语动词。及物动词后面无宾语，就必须要 求用关系代词。例如： （错） This is the mountain village where I visited last year. （错） I will never forget the days when I spent in the countryside. （对） This is the mountain village (which) I visited last year. （对） I'll never forget the days (which) I spent in the countryside. 习惯上总把表地点或时间的名词与关系副词 where, when联系在一起。此两题错在关系词的误用上。 方法二： 准确判断先行词在定语从句中的成分(主、谓、宾、定、状)，也能正确选择出关系代词/关系 副词.先行词在从句中作主、定、宾语时，应选择关系代词；先行词在从句中作状语时，应选 择关系副词。 例如：（对）Is this the museum which you visited a few days ago? （对）Is this the museum where the exhibition was held?
4、The films was quite moving.We saw it last night. 合并：
5、The young lady act very well.We talked about her just now.
6、The young lady who we talked about just now acts very well.
7、如何合并定语从句句子 导语：如何合并定语从句句子？首先定语从句是一个简单句跟在一名词或代词后（先行词）进行修饰限定，就叫做定语从句。下面是小编给大家整理的相关内容，希望能给你带来帮助! （一）如何合并定语从句句子 将两个句子中相同的名词其中一个去掉,将整句挪到那个完整句子的后面,再在中间添上先行词（关系代词、关系副词）即可 举例：
