主格形式：
第一人称：I, we
第二人称：you
第三人称：he, she, it, they
宾格形式：
第一人称：me, us
第二人称：you
第三人称：him, her, it, them
句中成分：
一.主语
正常语序：I’m sorry I’m late.
倒装：Is he married? －No, he is single.
二.宾语
动词宾语：You don’t need to thank me.
介词宾语：Without you, I can’t live.
三.表语
If I were him, I would take the job.
特殊用法：
一.she
1.雌性动物：
I have a cat and she loves sleeping.
2.船只车辆：
Nice car. How much did she cost?
3.国家：
English has done what she promised to do.
二.they
1.人：
They are swimming in the river.
2.物：
They are my books.
三.it
1.人或物：What’s this? －It is a sheep?
Who is it? －It’s me.
2.时间、季节：What time is it? －It’s nine. What season is it? －It is summer.
3.气候：Is it cold in this room? －No, it isn’t.
4.距离：It is five kilometers from my home to the school.
5.to do： It is difficult to climb a mountain.
6.doing：It is dangerous playing with fire.
7.从句：It is a pity that you didn’t see such a good film.
8.强调句：It was here that I first met him.
