Verbo to be

El verbo TO BE, que en castellano se traduce como SER o ESTAR, en el idioma inglés goza de una particular importancia. Su significado depende del sentido de la oración. 
 
Singular
 
I am
You are
He is
She is
It is
 
Plural
 
We are
You are
They are
 
Ejemplos
 
Singular
I am a teacher
You are a student
He is my friend
She is beautiful
It is small
 
Plural
We are doctors
You are architects
They are dancers
 
Forma positiva
Subject+verb to be+complement
I am a teacher
You are a teacher
He is a teacher
She is a teacher
It is a dog
We are teachers
They are teachers
You are teachers
 
Forma negativa
Subject+verb to be+not+complement
I am not a teacher
You are not a teacher
He is not a teacher
She is not a teacher
It is not a dog
We are not teachers
They are not teachers
You are not teachers
 
Pregunta
Verb to be+subject+complement+?
Am I a teacher?
Are you a teacher?
Is he a teacher?
Is she a teacher?
Is it a dog?
Are we teachers?
Are they teachers?
Are you teachers?