I am
Estoy
You are
Estas
He/she is
Esta
We are
Estamos
You are(plural)
Estais
They are
Estan
I was
Estuve
She was
Estuvo
They were
Estuvieron
You were
Estuviste
I used to be
Estaba
He used to be
Estaba
They used to be
Estaban
I am being
Estoy estando
He is being
Esta estando
You are being (plural
Estais estando
I am going to be
Voy a estar
We are going to be
Vamos a estar
I will be
Estare
We will be
Estaremos
They will be
Estaran
I have been
He estado
We have been
Hemos estado
They have been
Han estado