English verb conjugation
COULD SUPERVENE

Regular verb: supervene - supervened - supervened

Affirmation

Simple form	V-ing form
I could supervene you could supervene he could supervene we could supervene you could supervene they could supervene	I could be supervening you could be supervening he could be supervening we could be supervening you could be supervening they could be supervening
Perfect	V-ing perfect
I could have supervened you could have supervened he could have supervened we could have supervened you could have supervened they could have supervened	I could have been supervening you could have been supervening he could have been supervening we could have been supervening you could have been supervening they could have been supervening

Negation

Simple form	V-ing form
I could not supervene you could not supervene he could not supervene we could not supervene you could not supervene they could not supervene	I could not be supervening you could not be supervening he could not be supervening we could not be supervening you could not be supervening they could not be supervening
Perfect	V-ing perfect
I could not have supervened you could not have supervened he could not have supervened we could not have supervened you could not have supervened they could not have supervened	I could not have been supervening you could not have been supervening he could not have been supervening we could not have been supervening you could not have been supervening they could not have been supervening

Interrogative form

Simple form	V-ing form
could I supervene? could you supervene? could he supervene? could we supervene? could you supervene? could they supervene?	could I be supervening? could you be supervening? could he be supervening? could we be supervening? could you be supervening? could they be supervening?
Perfect	V-ing perfect
could I have supervened? could you have supervened? could he have supervened? could we have supervened? could you have supervened? could they have supervened?	could I have been supervening? could you have been supervening? could he have been supervening? could we have been supervening? could you have been supervening? could they have been supervening?

Interro-negative form

Simple form	V-ing form
could I not supervene? could you not supervene? could he not supervene? could we not supervene? could you not supervene? could they not supervene?	could I not be supervening? could you not be supervening? could he not be supervening? could we not be supervening? could you not be supervening? could they not be supervening?
Perfect	V-ing perfect
could I not have supervened? could you not have supervened? could he not have supervened? could we not have supervened? could you not have supervened? could they not have supervened?	could I not have been supervening? could you not have been supervening? could he not have been supervening? could we not have been supervening? could you not have been supervening? could they not have been supervening?