Let's work on completing the sentences with the correct form of the verb 'to be.'
I am a girl.
You are a student.
They are children.
It is a dog.
We are teachers.
She is an actress.
He is a doctor.
You are Peter.
Now, let's rewrite these sentences in negative and interrogative forms.
Negative Form:
I am not a girl.
You are not a student.
They are not children.
It is not a dog.
We are not teachers.
She is not an actress.
He is not a doctor.
You are not Peter.
Interrogative Form:
Am I a girl?
Are you a student?
Are they children?
Is it a dog?
Are we teachers?
Is she an actress?
Is he a doctor?
Are you Peter?
In English, to form the negative , we add 'not' after the form of 'to be.' For the interrogative , we switch the subject and the verb 'to be' to form a question.