It is either 'por nosotros' or 'Para nosotros'. It depends on what you are talking about.
United States in Spanish is Estados Unidos.
you say: "no nos olvides"
Los Estados Unidos
Dólar americano.
If you wan to say 'join us' in Spanish language, you will need to use the words: 'Unete a nosotros', this is if you want to say it in imperative form.
Los profesores nos ensenan (en espanol) = The teachers teach us (in Spanish)
de los Estados Unidos
los estados unidos
Translation: Nos quieres.
Extraño estar juntos
Gracias, pronounced as gra-she-us.
Ella nos da.