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 couldn't supervene you couldn't supervene he couldn't supervene we couldn't supervene you couldn't supervene they couldn't supervene	I couldn't be supervening you couldn't be supervening he couldn't be supervening we couldn't be supervening you couldn't be supervening they couldn't be supervening
Perfect	V-ing perfect
I couldn't have supervened you couldn't have supervened he couldn't have supervened we couldn't have supervened you couldn't have supervened they couldn't have supervened	I couldn't have been supervening you couldn't have been supervening he couldn't have been supervening we couldn't have been supervening you couldn't have been supervening they couldn't 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
couldn't I supervene? couldn't you supervene? couldn't he supervene? couldn't we supervene? couldn't you supervene? couldn't they supervene?	couldn't I be supervening? couldn't you be supervening? couldn't he be supervening? couldn't we be supervening? couldn't you be supervening? couldn't they be supervening?
Perfect	V-ing perfect
couldn't I have supervened? couldn't you have supervened? couldn't he have supervened? couldn't we have supervened? couldn't you have supervened? couldn't they have supervened?	couldn't I have been supervening? couldn't you have been supervening? couldn't he have been supervening? couldn't we have been supervening? couldn't you have been supervening? couldn't they have been supervening?