Subjective:

I

You

He/She

It

We

They

Objective:

Me

You

Him/Her

It

Us

Them

Possessive:

My

Your

His/Her

Its

Our

Their

I like her.

She likes me too.

We saw her yesterday.

Where did you see her?

We saw her at the library.

They don't like us.

We don't like them either.

I saw him last night.

Where was he?

He was at the theatre.