"Nous sommes de vieux amis."

Translation: We are old friends.

[ledohoanglong]

"Nous sommes de vieux amis." I think it should be "Nous sommes des vieux amis."? Or is it because that "des" become "de" when there's an adjective after it?

[Sitesurf]

Yes, that is the reason.

[ArtisG]

Thanks

[angelriv17]

why is incorrect to put "nous sommes de vieux amies"

[Sitesurf]

vieux is masculine

de vieilles amies is feminine

[Pinkquek]

Why is the 'de' necessary?

[Sitesurf]

singular: un ami

plural: des amis

in front of an adjective, "des" becomes "de"