To Be

As we mentioned below, the verb "to be" in English does not require that a distinction be made between permanent and temporary states as do the equivalents "estar" and "ser" in Spanish. It covers all of the meanings that both verbs cover in Spanish. One aspect you will have to focus on, however, is verb conjugation.

"To be" is conjugated as follows:

I am = Yo soy/estoy
You are = Tú eres/estás
He/She/It is = Él/Ella/Usted es/está
We are = Nosotros/as somos/estamos
[No English equivalent] = [Vosotros/as sois/estáis]
They are = Ellos/Ellas/Ustedes son/están

Examples
I am a doctor. = Soy médico.
I am sick. = Estoy enferma.

You are tall. = Eres alto.
I think you are angry. = Pienso que estás enojada.

She is very bright. = Ella es muy lista.
It is cloudy. = Está nublado.

We are from Morocco. = Somos de Marruecos.
We are tired of traveling. = Estamos cansados de viajar.

They are not going. = Ellos no van.
They are not are not aware of the challenge. = Ellos no son conscientes del desafío.


Contractions
Another feature of the verb "to be" you will want to pay attention to is the contraction. It is a shortened form of the verb commonly used in speech and
informal writing.

I'm = I am
You're = You are
He's/She's/It's = He is/She is/It is
We're = We are
They're = They are

Examples
I'm Cecil. = Soy Cecil.

You're right. = Tienes razón.

It's not fair. = No es justo.
(Also, you have the option in this case to instead contract "is" with "not" - It isn't fair.)

We're not sure of the location. = No estamos seguros de la ubicación.
(Again, in this case you may optionally contract "are" with the negative "not" instead - We aren't sure of the location.)

They're doing it again. = Lo están haciendo otra vez.