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My husband is a police officer.
Mi esposo es policía.
(he/she/it) is (for permanent states of being)
es
police officer
policía
He's a police officer.
Él es policía.
My sister is a police officer.
Mi hermana es policía.
Excuse me, are you a police officer?
Disculpe, ¿es usted policía?
nurse
enfermero
I'm a nurse. ( for a female )
Yo soy enfermera.
I'm a nurse, and he is a police officer. ( from a female)
Yo soy enfermera y él es policía.
journalist
periodista
My name is Juan. I'm a journalist.
Me llamo Juan. Soy periodista.
we
nosotros
(we) are (for permanent states of being)
somos
employee
empleado
We are employees.
Nosotros somos empleados.
We are not employees. We are journalists.
Nosotros no somos empleados. Somos periodistas.