2) They are students
He is my grandfather
She is my teacher
It is a fluffly
I am seven years old.
3) long form:
i am Pam
She is not a doctor
He is a firefighter
We are from Paris
It is a ball
You are not Mary
They are brothers
I am not tall
Short form:
I'm Pam
She's not a doctor
He's a firefighter
We're from Paris
It'a a ball
You're not Mary
They're brothers
I'm not tall