English verb conjugation
COULD NEGATIVE

Regular verb: negative - negatived - negatived

Affirmation

Simple form	V-ing form
I could negative you could negative she could negative we could negative you could negative they could negative	I could be negativing you could be negativing she 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 she 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 she 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 she 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 she 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 she 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 she 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 she negative? could we negative? could you negative? could they negative?	could I be negativing? could you be negativing? could she 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 she 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 she 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 she 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 she 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 she 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 she have been negativing? couldn't we have been negativing? couldn't you have been negativing? couldn't they have been negativing?