English verb conjugation
COULD UPHOLSTER

Regular verb: upholster - upholstered - upholstered

Affirmation

Simple form	V-ing form
I could upholster you could upholster he could upholster we could upholster you could upholster they could upholster	I could be upholstering you could be upholstering he could be upholstering we could be upholstering you could be upholstering they could be upholstering
Perfect	V-ing perfect
I could have upholstered you could have upholstered he could have upholstered we could have upholstered you could have upholstered they could have upholstered	I could have been upholstering you could have been upholstering he could have been upholstering we could have been upholstering you could have been upholstering they could have been upholstering

Negation

Simple form	V-ing form
I could not upholster you could not upholster he could not upholster we could not upholster you could not upholster they could not upholster	I could not be upholstering you could not be upholstering he could not be upholstering we could not be upholstering you could not be upholstering they could not be upholstering
Perfect	V-ing perfect
I could not have upholstered you could not have upholstered he could not have upholstered we could not have upholstered you could not have upholstered they could not have upholstered	I could not have been upholstering you could not have been upholstering he could not have been upholstering we could not have been upholstering you could not have been upholstering they could not have been upholstering

Interrogative form

Simple form	V-ing form
could I upholster? could you upholster? could he upholster? could we upholster? could you upholster? could they upholster?	could I be upholstering? could you be upholstering? could he be upholstering? could we be upholstering? could you be upholstering? could they be upholstering?
Perfect	V-ing perfect
could I have upholstered? could you have upholstered? could he have upholstered? could we have upholstered? could you have upholstered? could they have upholstered?	could I have been upholstering? could you have been upholstering? could he have been upholstering? could we have been upholstering? could you have been upholstering? could they have been upholstering?

Interro-negative form

Simple form	V-ing form
could I not upholster? could you not upholster? could he not upholster? could we not upholster? could you not upholster? could they not upholster?	could I not be upholstering? could you not be upholstering? could he not be upholstering? could we not be upholstering? could you not be upholstering? could they not be upholstering?
Perfect	V-ing perfect
could I not have upholstered? could you not have upholstered? could he not have upholstered? could we not have upholstered? could you not have upholstered? could they not have upholstered?	could I not have been upholstering? could you not have been upholstering? could he not have been upholstering? could we not have been upholstering? could you not have been upholstering? could they not have been upholstering?