英语指示代词和关系代词的区别是？谢谢

关系代词who, whom, whose, which, that是用用引导定语从句的：
1. who/whom/that
三者都可指代人: who作主语, whom 作宾语, that既可以作主语, 又可作宾语。 如:
He is a good teacher who/that is loved by all.
Here is the man (whom) you are looking for.
注意: ①在口语中, who 可以代替whom作宾语。②关系代词在定语从句中作宾语时, 一般可省略。
2. whose 可修饰人,也可修饰物; 修饰物时, 可与of which换用,whose在定语从句中作定语。如:
I saw some trees whose leaves were black with diseases.
= I saw some trees the leaves of which were black with diseases.
3. that/which/that/which指代物, 在定语从句中可作主语或宾语。如:
Emei is a wonderful place which/that is worth visiting.
The film (which/that) we saw last night is wonderful.

疑问代词用于特殊疑问句中，疑问代词一般放在句子的最前面，在句中可用作主语、宾语、表语、定语。

Whose sweaters are these? (定语)
What class are you in, Tom? (定语)
Whom are you looking for? 你在找谁? (宾格)
What is that? 那是什么?(表语)
Who was here just now? 刚才谁来过这儿? (主格)
(一般说来who在句子中作主格，whom在句子中作宾格)
Which one do you like, this one or that one? 你喜欢哪一个,这个还是那个?(定语)

指示代词（demonstrative pronoun）是表示指示概念的代词，即用来指示或标识人或事物的代词。指示代词与定冠词和人称代词一样，都具有指定的含义，用来起指示作用，或用来代替前面已提到过的名词。
指示代词分单数（this / that）和复数（these / those）两种形式，既可作限定词又可做代词，例如：单数　复数
限定词：This girl is Mary.Those men are my teachers.代词：This is Mary.　Those are my teachers.
指示代词在句子中可充当主语、宾语、表语、定语。
　　1、作主语
　　This is the way to do it.　这事儿就该这样做。　
　　2、作宾语
　　I like this better than that.　我喜欢这个甚至那个。
　　3、作介词宾语
　　I don't say no to that. 我并未拒绝那个。
　　There is no fear of that.　那并不可怕。
　　4、 作表语
　　My point is this.　我的观点就是如此。
　　5、作定语
　　This room is mine. 这间房间是我的。
关系代词
　　1） 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，例如：The girl to whom I spoke 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。）
　　2） 关系代词有主格，宾格和属格之分，并有指人与指物之分。在限定性定语从句中，that 可指人也可指物，见表：
　　限定性 非限定性 限定性
　　指 人 指 物 指人或指物
　　主 格 who which that
　　宾 格 whom that that
　　属 格 whose of which/whose of which/whose
　　例如：
　　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. 他回来取他丢下的书。
　　（which指物，在限定性定语从句中作宾语，可以省略）
　　3） 关系代词which的先行词可以是一个句子，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。
　　说明： 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。

指示代词：指明特定人事物的代词；离说话者较近：单数，this;复数，these
离说话者较远：单数，that；复数,those
1指示代词无所有格，可做句子的主语或宾语，This is a bird, and that is a pig
I like these rather than those.
2电话中，以that代替you ,this代替I
Hello?Who is that?
This is Tom's speaking

关系代词。用于定语从句中，修饰名词，有who,whose,whom,which,that,whom
God helps those who help themselves. who help themselves作为定语从句修饰those

关系词的选择依据在从句中所做的成分，先行词在从句中做主、定、宾语时，选择关系代词 (who, whom, that, which, whose)； 先行词在从句中做状语时，应选择关系副词 ( where 地点状语，when 时间状语，why 原因状语)

他们和关系代词主要的区别是where,when,why=介词+which
eg:This is the house in which (where) I lived last year.
This is the reason for which (why) he was late for school.
That's the on which day (when) I met him in the street.
以上也是我在百度上搜到的。

我再将他给的例句还原一下从句部分就是
I lived in the house last year 但是你不能说 I lived the house. 用这种方法你就可以分辨出需不需要加介词了，若是分割后不能成为一个完整的句子时就要加介词，若是不加介词的话就用关系副词直接状语修饰。像是 Where I lived 就可以。