The Verb To Be in the Simple Present
The verb to be has three forms in the present simple: am, is, and are. It is used to describe people, things, feelings, nationalities, jobs, and more.
I → am | He / She / It → is | You / We / They → are
Positive Sentences
I am a student.
She is from Brazil.
They are very friendly.
It is cold today.
We are in the classroom.
Negative Sentences
Add not after the verb. Common contractions: isn't, aren't. Note: am not has no standard contraction.
I am not tired.
He isn't (is not) a doctor.
We aren't (are not) late.
Questions
Move the verb to be before the subject to form a question.
Are you ready?
Is she your teacher?
Am I late?
Where are they from?
⚠ Common mistakes:
✗ She is a doctor? (question without inversion) → ✓ Is she a doctor?
✗ They is happy. → ✓ They are happy.
✗ He are my friend. → ✓ He is my friend.