用why造定语从句

　　英语学习最基础的就是词汇量的积累，大量的词汇积累是我们学习英语最重要的。小编为大家精心准备了用why造定语从句，欢迎大家前来阅读。

　　用why造定语从句如下：

　　The reason why he came is not very convincing.

　　Please tell me the reason why you missed the plane.

　　I don’t know the reason why he looks unhappy today.

　　I don’t know the reason why he came so late. 我不知道他来得那么晚的原因。

　　That is the reason why I don’t want to go. 那就是我不想去的理由。

　　He didn’t tell me the reason why he was so upset.他没有告诉我他为什么那样心烦意乱。

　　延伸阅读：

　　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 prosperity which / that had 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 package which / that you are carrying is about to come unwrapped. 你拿的包快散了。(which / that 在句中作宾语）

　　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。

　　定语从句中why的用法

　　请分析下面两个简单句：

　　句①He wanted to know the reason.

　　句②I was late for the reason.

　　把句②变为句①的定语从句，句①中的the reasons做定语从句的先行词。因为the reason做介词for的宾语，先行词是the reason指物，在定语从句中介词for提前，用关系代词which替代the reason，the reason就不能在定语从句中出现了。由此得到句③He wanted to know the reason for which I was late.

　　注意：在定语从句中当先行词为the reason(s)，定语从句由for which引导时，可以用why代替for which。由此我们得到句⑤He wanted to know the reason why I was late.

　　请把下面两句话合并为一句，把第二句话变为第一句的定语从句。

　　The reason is not very convincing.

　　He came for the reason.

　　→The reason why he came is not very convincing.

　　The reason for which he came is not very convincing.

　　定语从句

　　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。

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