English verb conjugation
COULD UPWELL

Regular verb: upwell - upwelled - upwelled

Affirmation

Simple form	V-ing form
I could upwell you could upwell he could upwell we could upwell you could upwell they could upwell	I could be upwelling you could be upwelling he could be upwelling we could be upwelling you could be upwelling they could be upwelling
Perfect	V-ing perfect
I could have upwelled you could have upwelled he could have upwelled we could have upwelled you could have upwelled they could have upwelled	I could have been upwelling you could have been upwelling he could have been upwelling we could have been upwelling you could have been upwelling they could have been upwelling

Negation

Simple form	V-ing form
I could not upwell you could not upwell he could not upwell we could not upwell you could not upwell they could not upwell	I could not be upwelling you could not be upwelling he could not be upwelling we could not be upwelling you could not be upwelling they could not be upwelling
Perfect	V-ing perfect
I could not have upwelled you could not have upwelled he could not have upwelled we could not have upwelled you could not have upwelled they could not have upwelled	I could not have been upwelling you could not have been upwelling he could not have been upwelling we could not have been upwelling you could not have been upwelling they could not have been upwelling

Interrogative form

Simple form	V-ing form
could I upwell? could you upwell? could he upwell? could we upwell? could you upwell? could they upwell?	could I be upwelling? could you be upwelling? could he be upwelling? could we be upwelling? could you be upwelling? could they be upwelling?
Perfect	V-ing perfect
could I have upwelled? could you have upwelled? could he have upwelled? could we have upwelled? could you have upwelled? could they have upwelled?	could I have been upwelling? could you have been upwelling? could he have been upwelling? could we have been upwelling? could you have been upwelling? could they have been upwelling?

Interro-negative form

Simple form	V-ing form
could I not upwell? could you not upwell? could he not upwell? could we not upwell? could you not upwell? could they not upwell?	could I not be upwelling? could you not be upwelling? could he not be upwelling? could we not be upwelling? could you not be upwelling? could they not be upwelling?
Perfect	V-ing perfect
could I not have upwelled? could you not have upwelled? could he not have upwelled? could we not have upwelled? could you not have upwelled? could they not have upwelled?	could I not have been upwelling? could you not have been upwelling? could he not have been upwelling? could we not have been upwelling? could you not have been upwelling? could they not have been upwelling?