English verb conjugation
COULD VITIATE

Regular verb: vitiate - vitiated - vitiated

Affirmation

Simple form	V-ing form
I could vitiate you could vitiate he could vitiate we could vitiate you could vitiate they could vitiate	I could be vitiating you could be vitiating he could be vitiating we could be vitiating you could be vitiating they could be vitiating
Perfect	V-ing perfect
I could have vitiated you could have vitiated he could have vitiated we could have vitiated you could have vitiated they could have vitiated	I could have been vitiating you could have been vitiating he could have been vitiating we could have been vitiating you could have been vitiating they could have been vitiating

Negation

Simple form	V-ing form
I could not vitiate you could not vitiate he could not vitiate we could not vitiate you could not vitiate they could not vitiate	I could not be vitiating you could not be vitiating he could not be vitiating we could not be vitiating you could not be vitiating they could not be vitiating
Perfect	V-ing perfect
I could not have vitiated you could not have vitiated he could not have vitiated we could not have vitiated you could not have vitiated they could not have vitiated	I could not have been vitiating you could not have been vitiating he could not have been vitiating we could not have been vitiating you could not have been vitiating they could not have been vitiating

Interrogative form

Simple form	V-ing form
could I vitiate? could you vitiate? could he vitiate? could we vitiate? could you vitiate? could they vitiate?	could I be vitiating? could you be vitiating? could he be vitiating? could we be vitiating? could you be vitiating? could they be vitiating?
Perfect	V-ing perfect
could I have vitiated? could you have vitiated? could he have vitiated? could we have vitiated? could you have vitiated? could they have vitiated?	could I have been vitiating? could you have been vitiating? could he have been vitiating? could we have been vitiating? could you have been vitiating? could they have been vitiating?

Interro-negative form

Simple form	V-ing form
could I not vitiate? could you not vitiate? could he not vitiate? could we not vitiate? could you not vitiate? could they not vitiate?	could I not be vitiating? could you not be vitiating? could he not be vitiating? could we not be vitiating? could you not be vitiating? could they not be vitiating?
Perfect	V-ing perfect
could I not have vitiated? could you not have vitiated? could he not have vitiated? could we not have vitiated? could you not have vitiated? could they not have vitiated?	could I not have been vitiating? could you not have been vitiating? could he not have been vitiating? could we not have been vitiating? could you not have been vitiating? could they not have been vitiating?