English verb conjugation
WOULD STIFFEN

Regular verb: stiffen - stiffened - stiffened

Affirmation

Simple form	V-ing form
I would stiffen you would stiffen she would stiffen we would stiffen you would stiffen they would stiffen	I would be stiffening you would be stiffening she would be stiffening we would be stiffening you would be stiffening they would be stiffening
Perfect	V-ing perfect
I would have stiffened you would have stiffened she would have stiffened we would have stiffened you would have stiffened they would have stiffened	I would have been stiffening you would have been stiffening she would have been stiffening we would have been stiffening you would have been stiffening they would have been stiffening

Negation

Simple form	V-ing form
I would not stiffen you would not stiffen she would not stiffen we would not stiffen you would not stiffen they would not stiffen	I would not be stiffening you would not be stiffening she would not be stiffening we would not be stiffening you would not be stiffening they would not be stiffening
Perfect	V-ing perfect
I would not have stiffened you would not have stiffened she would not have stiffened we would not have stiffened you would not have stiffened they would not have stiffened	I would not have been stiffening you would not have been stiffening she would not have been stiffening we would not have been stiffening you would not have been stiffening they would not have been stiffening

Interrogative form

Simple form	V-ing form
would I stiffen? would you stiffen? would she stiffen? would we stiffen? would you stiffen? would they stiffen?	would I be stiffening? would you be stiffening? would she be stiffening? would we be stiffening? would you be stiffening? would they be stiffening?
Perfect	V-ing perfect
would I have stiffened? would you have stiffened? would she have stiffened? would we have stiffened? would you have stiffened? would they have stiffened?	would I have been stiffening? would you have been stiffening? would she have been stiffening? would we have been stiffening? would you have been stiffening? would they have been stiffening?

Interro-negative form

Simple form	V-ing form
would I not stiffen? would you not stiffen? would she not stiffen? would we not stiffen? would you not stiffen? would they not stiffen?	would I not be stiffening? would you not be stiffening? would she not be stiffening? would we not be stiffening? would you not be stiffening? would they not be stiffening?
Perfect	V-ing perfect
would I not have stiffened? would you not have stiffened? would she not have stiffened? would we not have stiffened? would you not have stiffened? would they not have stiffened?	would I not have been stiffening? would you not have been stiffening? would she not have been stiffening? would we not have been stiffening? would you not have been stiffening? would they not have been stiffening?