her 形容詞性物主代詞,hers名詞性物主代詞，she在開頭用,her是東西的主人,hers是連主人帶東西。she is a girl。她是女孩 this is her book。這是她的書 this is hers。這是她的，hers后，不能加?xùn)|西。

人稱代詞的用法

1) 定義：人稱代詞是用來指代人、動物或事物的代詞。它必須在人稱(第一人稱、第二人稱、及第三人稱)、數(shù)（單數(shù)、復(fù)數(shù)）以及性（陰性、陽性、中性）三方面與被指代的名詞一致。

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

Mary is very pretty, and she likes singing.

The boys are students, and they are in the room.

The boy is small. It is Tom's.

2) 人稱代詞的句法功能

A) 人稱代詞有主格和賓語之分：主格用作主語，賓格用作賓語。

B) 人稱代詞的主格形式在在句中作主語和表語。

如: I like music(主語). She is a teacher.(主語)

She and I are good friends(主語).

Neither she nor I am student.

——I saw the boys this morning.

——Are you sure it was they(表語)?

It might have been she.

C) 人稱代詞的賓格在句子作動詞的賓語，或者介詞的賓語。

如：I saw him at the party(賓語).

I haven't seen them recently.(賓語)

I bought a book for them.(作介詞賓語)=I bought them a book.(間接賓語)