El verbo "to be" en inglés

El verbo to be  (ser/estar) es uno de los verbos que más se usa en inglés y es un verbo irregular, así que es importante saber bien cómo se conjuga y cuándo se usa. En este artículo repasaremos algunas de las conjugaciones más comunes de to be, y veremos en qué contextos se usa. Let's begin!  (¡Empecemos!)

Tiempos simples

En la tabla a continuación encontrarás las conjugaciones para the present  (el presente) y the past  (el pretérito) de to be.

Sujeto                                      Present		Past
I	am	was
You	are	were
He/She/It	is	was
We	are	were
They	are	were

Simple Present

Afirmativo

Forma larga	Forma corta
I am	I'm
You are	You're
He is	He's
She is	She's
It is	It's
We are	We're
You are	You're
They are	They're

La forma larga se utiliza en los textos escritos y en el habla formal.

La forma corta se utiliza en el lenguaje hablado y en escritos informales.

Ejemplos afirmativos

Uso formal	Uso informal
I am a student	I'm a student	Soy estudiante
You are Spanish	You're Spanish	Eres español
He is sad	He's sad	Él está triste
She is tall	She's tall	Ella es alta
It is cold	It's cold	Hace frío
We are from Málaga	We're from Málaga	Somos de Málaga
You are nice	You're nice	Sois agradables
They are policemen	They're policemen	Son policías

La estructura del 'simple present' en forma negativa es:

Sujeto + verbo + not + ... 

Forma larga	Formas cortas
I am not	I'm not
You are not	You're not	You aren't
He is not	He's not	He isn't
She is not	She's not	She isn't
It is not	It's not	It isn't
We are not	We're not	We aren't
You are not	You're not	You aren't
They are not	They're not	They aren't

La forma negativa, al igual que la afirmativa, se puede contraer.

Ejemplos

Uso formal	Uso informal
I am not tall	I'm not tall	No soy alto
You are not Irish	You aren't Irish	No eres irlandés
He is not rich	He's not rich	No es rico
She is not clever	She isn't clever	No es lista
It is not big	It's not big	No es grande
We are not ugly	We aren't ugly	No somos feos
You are not funny	You're not funny	No sois divertidos
They are not English	They aren't English	No son ingleses

La estructura del 'simple present' de verbo 'to be' en forma interrogativa es:

Verbo + sujeto + ... + ?

Afirmativo	Negativo
Am I...?	Am I not...?	Am I not...?
Are you...?	Are you not...?	Aren't you...?
Is he...?	Is he not...?	Isn't he...?
Is she...?	Is she not...?	Isn't she...?
Is it...?	Is it not...?	Isn't it...?
Are we...?	Are we not...?	Aren't we...?
Are you...?	Are you not...?	Aren't you...?
Are they...?	Are they not...?	Aren't they...?

Ejemplos

Am I nice?	¿Soy agradable?
Who are you?	¿Quién eres?
Is he not polite?	¿No es educado?
Where is she?	¿Dónde está?
Is it not difficult?	¿No es difícil?
Are we lost?	¿Estamos perdidos?
Why are you busy?	¿Por qué estáis ocupados?
Aren't they lawyers?	¿No son abogados?

 Oraciones Con Verb TO BE - Afirmativo Negativa e Interrogativa