AffirmativeNegative
Direct

Every C is s.t. (it)
dom: Cs
attr: being a thing s.t. …it…

(∀x: x is a C) …x…

No C is s.t. (it)
dom: Cs
attr: not being a thing s.t. …it…

(∀x: x is a C) ¬ …x…
Complementary

Only Cs are s.t. (they)
dom: non-Cs
attr: not being a thing s.t. …it…

(∀x: ¬ x is a C) ¬ …x…