English verb conjugation
COULD BOLSTER

Regular verb: bolster - bolstered - bolstered

Affirmation

Simple form	V-ing form
I could bolster you could bolster he could bolster we could bolster you could bolster they could bolster	I could be bolstering you could be bolstering he could be bolstering we could be bolstering you could be bolstering they could be bolstering
Perfect	V-ing perfect
I could have bolstered you could have bolstered he could have bolstered we could have bolstered you could have bolstered they could have bolstered	I could have been bolstering you could have been bolstering he could have been bolstering we could have been bolstering you could have been bolstering they could have been bolstering

Negation

Simple form	V-ing form
I could not bolster you could not bolster he could not bolster we could not bolster you could not bolster they could not bolster	I could not be bolstering you could not be bolstering he could not be bolstering we could not be bolstering you could not be bolstering they could not be bolstering
Perfect	V-ing perfect
I could not have bolstered you could not have bolstered he could not have bolstered we could not have bolstered you could not have bolstered they could not have bolstered	I could not have been bolstering you could not have been bolstering he could not have been bolstering we could not have been bolstering you could not have been bolstering they could not have been bolstering

Interrogative form

Simple form	V-ing form
could I bolster? could you bolster? could he bolster? could we bolster? could you bolster? could they bolster?	could I be bolstering? could you be bolstering? could he be bolstering? could we be bolstering? could you be bolstering? could they be bolstering?
Perfect	V-ing perfect
could I have bolstered? could you have bolstered? could he have bolstered? could we have bolstered? could you have bolstered? could they have bolstered?	could I have been bolstering? could you have been bolstering? could he have been bolstering? could we have been bolstering? could you have been bolstering? could they have been bolstering?

Interro-negative form

Simple form	V-ing form
could I not bolster? could you not bolster? could he not bolster? could we not bolster? could you not bolster? could they not bolster?	could I not be bolstering? could you not be bolstering? could he not be bolstering? could we not be bolstering? could you not be bolstering? could they not be bolstering?
Perfect	V-ing perfect
could I not have bolstered? could you not have bolstered? could he not have bolstered? could we not have bolstered? could you not have bolstered? could they not have bolstered?	could I not have been bolstering? could you not have been bolstering? could he not have been bolstering? could we not have been bolstering? could you not have been bolstering? could they not have been bolstering?