⇒⇒ Simple present >>> interrogative and negative forms
a. Mary is my best friend.
Mary isn't my best friend.
Is Mary my best friend?
b. John and Cindy are classmates.
John and Cindy aren't classmates.
Are John and Cindy classmates?
c. Peter is my brother.
Peter isn't my brother.
Is Peter my brother?
d. You are a good student.
You aren't a good student.
Are you a good student?
e. They are in the classroom.
They aren't in the classroom.
Are they in the classroom?
f. It is an orange.
It isn't an orange.
Is it an orange?
g. Felicia and Mary are sisters.
Felicia and Mary aren't sisters.
Are Felicia and Mary sisters?
h. I am her teacher.
I am not her teacher.
Am I her teacher?
i. It is a book bag.
It isn't a book bag.
Is it a book bag?
j. You are a doctor.
You aren't a doctor.
Are you a doctor?
⇒⇒ Verb to be - simple present (ser - estar)
Affirmative
I am ..
You are ...
He is ...
She is ...
It is ...
We are ...
You are ...
They are ...
⇒⇒ Para fazer a interrogativa >>> coloca o verbo no início da frase e acrescenta o ponto de interrogação no final.
Are you a student?
Is she a dancer?
⇒⇒ Para fazer a negativa >>> acrescenta ''not'' após o verbo ''to be''
I am not an engineer.
They are not teachers.
He is not an actor.
She is not here.
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