The verb - ser - to be

yo soy - I am

tú eres - you are

usted es - you are

él es - he is

ella es - she is

nosotros somos - we are (group of boys)

nosotras somos - we are (group of girls)

vosotros sois - you are (group of boys)

vosotras sois - you are (group of girls)

ustedes son - you are

ellos son - they are (group of boys)

ellas son - they are (group of girls)