English verb conjugation
COULD NEGATE

Regular verb: negate - negated - negated

Affirmation

Simple form	V-ing form
I could negate you could negate she could negate we could negate you could negate they could negate	I could be negating you could be negating she could be negating we could be negating you could be negating they could be negating
Perfect	V-ing perfect
I could have negated you could have negated she could have negated we could have negated you could have negated they could have negated	I could have been negating you could have been negating she could have been negating we could have been negating you could have been negating they could have been negating

Negation

Simple form	V-ing form
I could not negate you could not negate she could not negate we could not negate you could not negate they could not negate	I could not be negating you could not be negating she could not be negating we could not be negating you could not be negating they could not be negating
Perfect	V-ing perfect
I could not have negated you could not have negated she could not have negated we could not have negated you could not have negated they could not have negated	I could not have been negating you could not have been negating she could not have been negating we could not have been negating you could not have been negating they could not have been negating

Interrogative form

Simple form	V-ing form
could I negate? could you negate? could she negate? could we negate? could you negate? could they negate?	could I be negating? could you be negating? could she be negating? could we be negating? could you be negating? could they be negating?
Perfect	V-ing perfect
could I have negated? could you have negated? could she have negated? could we have negated? could you have negated? could they have negated?	could I have been negating? could you have been negating? could she have been negating? could we have been negating? could you have been negating? could they have been negating?

Interro-negative form

Simple form	V-ing form
could I not negate? could you not negate? could she not negate? could we not negate? could you not negate? could they not negate?	could I not be negating? could you not be negating? could she not be negating? could we not be negating? could you not be negating? could they not be negating?
Perfect	V-ing perfect
could I not have negated? could you not have negated? could she not have negated? could we not have negated? could you not have negated? could they not have negated?	could I not have been negating? could you not have been negating? could she not have been negating? could we not have been negating? could you not have been negating? could they not have been negating?