posted by Larry .
Write the correct form of ser.
Tu y tus padres________________de Puerto Rico?
Which is the correct form?
'son' or 'sois'
This would depend upon whether you are using usted/ustedes = son OR vosotros = sois.
Many textbooks do not even teach the vosotros/vosotras (familiar plural) form. Without knowing which textbook you have, or what your class is learning, I can not guess which is best for you1
To add to Sra's answer, much of this depends on where the language is spoken. There are not many areas that use the Vosotros form.
The way I learned in high school is to use the vosotros form there. This is because the "tu" is informal. When I got to college, my professors wanted me to use more the Ustedes form to designate any plural "you." They didn't mind that I used vosotros, but you could tell they preferred the Uds.
He's alive! Is he well? We've missed you here, Matt. Hope all is fine.