​什么是关系代词

什么是关系代词

在初中的英语课本中，随着我们学习的脚步，我们进入了关系代词的天地，但是你对它的了解有多少呐，你掌握了多少呐，下面就让为大家介绍一下吧：

关系代词：

用来引导定语从句。它代表先行词，同时在从句中作一定的句子成分。

关系代词有主格，宾格和属格之分，并有指人与指物之分，它在先行词和定语之间起纽带作用。

主要的关系代词有who,whom,whose,which和that。

①who指人，在定语从句中作主语或宾语；

whom指人，在定语从句中作宾语；

whose在定语 从句中作定语，其先行词既可以是人也可以是物。

例如：The teacher who/whom you want to see has come.

②which指物，在定语从句中作主语或宾语。

例如：Here is the coat which will be made to you.

③that多指物，有时也指人，在定语从句中作主语或宾语。

例如：I have eaten bread that/which he gave to me.

关系代词的基本用法：

（1）引导定语从句

关系代词代表先行词，同时在从句中作一定的句子成分，例如：

The girl whom I spoke to is my cousin. 跟我讲话的姑娘是我表妹。

（该句中whom既代表先行词the girl，又在从句中作介词to的宾语。）

This is the pencil whose point is broken.这就是那个折了尖的铅笔。

(whose 指物，在限定性定语从句中作定语)

He came back for the book which he had forgotten.他重新回来都忘记了他的那本书。

（which指物，在限定性定语从句中作宾语，可以省略）

（2）which为其先行词。例如：

He said he saw me there, which was a lie.他说在那儿看到了我，纯属谎言。

（3）其他用法

关系代词that在从句中作宾语或表语时可省略， 例如：

I've forgotten much of the Latin I once knew.我过去懂拉丁语，现在大都忘了。

He's changed. He's not the man he was.他变化很大，已不是过去的他了。

注释：关系代词在从句中作宾语时可省略，that在从句中作表语时也可省略。

非限定性定语从句中，不能用that作关系代词。

关系代词的语法注意:

1.常用that 不用which的情况:

①先行词为all, anything, everything, nothing, something等时。

I will do all (that) I can to help you.

②先行词被序数词、形容词最高级或the only, the very等所修饰时。

He was the only person that joined the army in his village that year.

③先行词既有人,又有物时

They talked about the people and the things (that)they remembered in the school.

④当主句是以who 或which开头的疑问句时, 定语从句用that 引导, 以避免重复。

Who is the boy that was here just now?

2. 若被修饰的名词充当从句介词宾语时

介词可提前于引导词之前,此时的引导词只能用whom 或which.

The pencil with which he was writing broke.

3. 当先行词为way时

其后的定语从句用in which或 that引导,也可不用引导词。

I don’t like the way (in which/that) he talks to me.

used to/be used to的分别：

①used to + do："过去常常"表示过去习惯性的动作或状态，但如今已不存在。

Mother used not to be so forgetful.

②be used to + doing： 对……已感到习惯，或"习惯于"，to是介词，后需加名词或动名词。

Scarf is used to taking a walk.(现在习惯于散步)

③used to 的用法 （否定式简写为usedn't） 过去经常，以前常常

This used to be a shabby house. （此房年久失修）

used to,would这两个词语都可以表示过去常做某事，有时可以换用。

used to do 强调过去习惯性的行为或状态，但是现在没有这种行为或状态了。因此，这个短语的内涵是今昔对比。

关系代词的用法:

一、不用that的情况

在引导非限定性定语从句时 (错)The tree, that is four hundred years old, is very famous here.

介词后不能用We depend on the land from which we get our food.

二、只能用that作为定语从句的关系代词的情况

a.在there be 句型中，只用that，不用which。

b.在不定代词，如：anything, nothing, the one, all, much, few, any, little等作先行词时，只用that，不用which。

c.先行词有the only, the very.（恰恰，正好）.any. few. little. no. all 修饰时，只用that。

d.先行词为序数词、数词、形容词最高级时，只用that。

e.先行词既有人，又有物时。

Finally, the thief handed everything that he had stolen to the police.那贼最终把偷的全部东西交给了警察。

三、不能用关系代词Which 的几种情况

1.当先行词为all, little, much, few, everything, none 等不定代词时关系代词用that而不用which.

There are few books that you can read in this book store.

2.当先行词既有人又有物时，关系代词用that, 不用which.

He asked about the factories and workers that he had visited.

3.当先行词有形容词最高级修饰时，关系代词用that, 而不用which.

Guilin is one of the most beautiful cities that I have ever visited.

4.当先行词有序数词修饰时，关系代词用that, 不用which.

The first sight that was caught at the Great Wall has made a lasting impression on him.

5.当先行词被the only, the very, the same, the right等修饰时，关系代词用that,不用which.

It is the only book that he bought himself.

6.当先行词被all, every, any, much, little, few, no等修饰时，关系代词用that,不用which.

There is no clothes that fit you here.

7.当主句是以which开头的特殊问句时，定语从句关系代词一般用that而不用which.

Which of the books that had pictures was worth reading?

8.在强调句型" It is ... that ..." 中,只用that,不用which.

It is in this room that he was born twenty years ago.

9.在" such (the same) ... as ..." 句型中,关系代词要用as, 而不用which.

We need such materials as (not which) can bear high temperature.

10.表示" 正如... 那样 "，" 正象..." 之意时，用as, 不用which.

Mary was late again, as had been expected.

11.As 引导的定语从句可以放在主句前面，也可以放在主句后面或主句中间，而由 which引导的定语从句只能放在主句后面。

As we all know, oceans cover more than 70% of the earth.

以上就是关于关系代词的一个简单介绍，希望这里内容对大家在以后英语练习中，会有一定的启发，帮助大家能够更好的学好英语，祝大家学习愉快。