English verb conjugation
COULD NEGATIVE

Regular verb: negative - negatived - negatived

Affirmation

Simple form	V-ing form
I could negative you could negative he could negative we could negative you could negative they could negative	I could be negativing you could be negativing he could be negativing we could be negativing you could be negativing they could be negativing
Perfect	V-ing perfect
I could have negatived you could have negatived he could have negatived we could have negatived you could have negatived they could have negatived	I could have been negativing you could have been negativing he could have been negativing we could have been negativing you could have been negativing they could have been negativing

Negation

Simple form	V-ing form
I couldn't negative you couldn't negative he couldn't negative we couldn't negative you couldn't negative they couldn't negative	I couldn't be negativing you couldn't be negativing he couldn't be negativing we couldn't be negativing you couldn't be negativing they couldn't be negativing
Perfect	V-ing perfect
I couldn't have negatived you couldn't have negatived he couldn't have negatived we couldn't have negatived you couldn't have negatived they couldn't have negatived	I couldn't have been negativing you couldn't have been negativing he couldn't have been negativing we couldn't have been negativing you couldn't have been negativing they couldn't have been negativing

Interrogative form

Simple form	V-ing form
could I negative? could you negative? could he negative? could we negative? could you negative? could they negative?	could I be negativing? could you be negativing? could he be negativing? could we be negativing? could you be negativing? could they be negativing?
Perfect	V-ing perfect
could I have negatived? could you have negatived? could he have negatived? could we have negatived? could you have negatived? could they have negatived?	could I have been negativing? could you have been negativing? could he have been negativing? could we have been negativing? could you have been negativing? could they have been negativing?

Interro-negative form

Simple form	V-ing form
couldn't I negative? couldn't you negative? couldn't he negative? couldn't we negative? couldn't you negative? couldn't they negative?	couldn't I be negativing? couldn't you be negativing? couldn't he be negativing? couldn't we be negativing? couldn't you be negativing? couldn't they be negativing?
Perfect	V-ing perfect
couldn't I have negatived? couldn't you have negatived? couldn't he have negatived? couldn't we have negatived? couldn't you have negatived? couldn't they have negatived?	couldn't I have been negativing? couldn't you have been negativing? couldn't he have been negativing? couldn't we have been negativing? couldn't you have been negativing? couldn't they have been negativing?