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　　（一）代词概述

　　代词用来代替名词，在句中充当主语、宾语和表语，有时还可以充当定语。代词在考试命题中主要是代词格的变化、代词单复数形式以及不定代词和it的用法等。

　　（二）基本知识梳理

　　1.人称代词：主格作主语，宾格用作及物动词和介词的宾语。

　　He often helps me.

　　Who is atthe door?It's me.

　　The bicyclebelongs to Tom and me.

　　出现并列主语或宾语时，其排列顺序为：单数时是第二、第三、第一人称（简称231）即you，heandI或you，herandme；复数时是第一、第二、第三人称（简称123）即we，youandthey或us，youandthem。

　　2.物主代词：形容词性物主代词作定语，后加名词；而名词性物主代词等于形容词性物主代词加名词。如：This is my book.=This book is mine.

　　名词性物主代词可做主语、宾语和表语。如：

　　Your pen is blue.Mine is blue,too.

　　May I use your pen?I've lost mine.

　　She is a class mate of his.

　　The bike is hers.

　　3.反身代词：用作宾语和起强调作用。

　　1）作宾语

　　Help yourself to some cakes.

　　I can look at my selfin the mirror.

　　They should think more of the publichealth than them selves.

　　2）作强调

　　We do homework by ourselves.

　　I myself go to the air port to meet my uncle.

　　4.指示代词

　　1）this，that，these，those

　　What'sthis(that)?It'sabook.

　　Whatarethese(those)?Theyarebooks.

　　this和these比较靠近，that和those稍远一点。

　　2）it的用法

　　（1）指物：It's a robot.

　　（2）指自然现象：It's raining now,but it will be fine soon.

　　（3）指时间：What time is it?It's8o'clock.

　　（4）指距离：It's twentyminutes'walk.

　　（5）作形式主语：It's importantforustofightpollution.

　　It took mehalfanhourtofinishthework.

　　It'skindofyoutosayso.

　　（6）作形式宾语：Wethinkitnecessarytorelaxfromtimetotime.