It's the we conjugation of ser:
Nosotros somos - We are
Nosotros no somos - We are not...
yo soy - I am
tú eres - you are
él es - he is
ellos son - they are
nosotros somos - we are
Does Nosotros get omitted ever? It sounds like we need to use "we" twice. "We we are".
I know we use "ser" to express occupations, but what if the occupation is temporary, not permanent - like a one day fill in? Would you use "estar" in that situation?
I took a spanish class in high school. They taught all forms of the verb, which makes questions like these easier to understand