El verbo SER (negativo)
I am not · I’m not
He is not · He isn’t
They are not · They aren’t
Por ejemplo:
Yo no soy profesor
I’m not a teacher
Ella no es mexicana
She isn’t Mexican
Ustedes no son abogados
You aren’t lawyers

Para formar una frase negativa con el verbo to be (ser) agregamos la palabra not después del verbo y decimos:
You can see how this popup was set up in our step-by-step guide: https://wppopupmaker.com/guides/auto-opening-announcement-popups/
You can see how this popup was set up in our step-by-step guide: https://wppopupmaker.com/guides/auto-opening-announcement-popups/