人称代词的用法

1) 定义：人称代词是用来指代人、动物或事物的代词。它必须在人称(第一人称、第二人称、及第三人称)、数（单数、复数）以及性（阴性、阳性、中性）三方面与被指代的名词一致。

如：I am a student. Tom is a boy, and heis a student.

Mary is very pretty, and shelikes singing.

The boys are students, and theyare in the room.

The dog is small. Itis Tom's.

2)人称代词的句法功能

A)人称代词有主格和宾语之分：主格用作主语，宾格用作宾语。

B) 人称代词的主格形式在在句中作主语和表语。

如: Ilike music(主语). Sheis a teacher.(主语)

She and Iare good friends(主语).

Neither she nor I am student.

——I saw the boys this morning.

——Are you sure it was they(表语)?

It might have been she.

C) 人称代词的宾格在句子作动词的宾语，或者介词的宾语。

如：I saw himat the party(宾语).

I haven't seen themrecently.(宾语)

I bought a book for them.(作介词宾语)

=I bought thema book.(间接宾语)