I, Me, My ...

We use them to replace names. They help us talk about people without saying their names over and over.
Base form Other form Possessive
(Who?) (Whom?) (Whose?)
I me my
you you your
he him his
she her her
it it its
we us our
you you your
they them their
For language geeks:
The base form is also called subject pronoun and answers the
question: Who?
The other form (Accusative/Dative Form) is also called object pronoun and answers the
question: Whom?
The possessive is also called possessive adjective and answers the
question: Whose (book)...?
Here are some sentences to show how they work:
I, me, my
(1st person singular )
I am a student.
Laura likes me very much.
Chris helps me every day.
My book is red.
you, you, your
(2nd person singular)
You are a student.
Laura likes you very much.
Chris helps you every day.
Your book is red.
he, him, his
(3rd person singular - masculine)
He is a student.
Laura likes him very much.
Chris helps him every day.
His book is red.
she, her, her
(3rd person singular - feminine)
She is a student.
Laura likes her very much.
Chris helps her every day.
Her book is red.
it, it, its (objects, animals...)
(3rd person singular neuter)
It is a pencil.
Laura likes it very much.
Chris gives it a try.
Its colour is red.
we, us, our
(1st person plural)
We are students.
Laura likes us very much.
Chris helps us every day.
Our book is red.
you, you, your
(2nd person plural)
You are students.
Laura likes you (all) very much.
Chris helps you (all) every day.
Your book is red. (You share one book)
Your books are red. (Each person has a red book)
they, them, their
(3rd person plural)
They are students.
Laura likes them very much.
Chris helps them every day.
Their book is red.