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 could not negative you could not negative he could not negative we could not negative you could not negative they could not negative	I could not be negativing you could not be negativing he could not be negativing we could not be negativing you could not be negativing they could not be negativing
Perfect	V-ing perfect
I could not have negatived you could not have negatived he could not have negatived we could not have negatived you could not have negatived they could not have negatived	I could not have been negativing you could not have been negativing he could not have been negativing we could not have been negativing you could not have been negativing they could not 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
could I not negative? could you not negative? could he not negative? could we not negative? could you not negative? could they not negative?	could I not be negativing? could you not be negativing? could he not be negativing? could we not be negativing? could you not be negativing? could they not be negativing?
Perfect	V-ing perfect
could I not have negatived? could you not have negatived? could he not have negatived? could we not have negatived? could you not have negatived? could they not have negatived?	could I not have been negativing? could you not have been negativing? could he not have been negativing? could we not have been negativing? could you not have been negativing? could they not have been negativing?