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Vamos a conjugar los tiempos verbales del presente con el verbo TO BE de forma afirmativa:

PRESENT

I am (yo soy, estoy)
You are (tu eres, estás)
He/She is (el/ella es, está)
We are (nosotros...)
You are (vosotros...)
They are (ellos...)

PRESENT PERFECT

I have been (yo he sido, he estado)
You have been (tu has sido, has estado)
He/She has been (el/ella ha sido, ha estado)
We have been (nosotros...)
You have been (vosotros...)
They have been (ellos...)