英语指示代词和关系代词的区别是？谢谢

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