I may stiffen you may stiffen he may stiffen we may stiffen you may stiffen they may stiffen
Forma con V-ing
I may be stiffening you may be stiffening he may be stiffening we may be stiffening you may be stiffening they may be stiffening
Perfecto
I may have stiffened you may have stiffened he may have stiffened we may have stiffened you may have stiffened they may have stiffened
Perfecto con V-ing
I may have been stiffening you may have been stiffening he may have been stiffening we may have been stiffening you may have been stiffening they may have been stiffening
Negación
Forma simple
I may not stiffen you may not stiffen he may not stiffen we may not stiffen you may not stiffen they may not stiffen
Forma con V-ing
I may not be stiffening you may not be stiffening he may not be stiffening we may not be stiffening you may not be stiffening they may not be stiffening
Perfecto
I may not have stiffened you may not have stiffened he may not have stiffened we may not have stiffened you may not have stiffened they may not have stiffened
Perfecto con V-ing
I may not have been stiffening you may not have been stiffening he may not have been stiffening we may not have been stiffening you may not have been stiffening they may not have been stiffening
Forma interrogativa
Forma simple
may I stiffen? may you stiffen? may he stiffen? may we stiffen? may you stiffen? may they stiffen?
Forma con V-ing
may I be stiffening? may you be stiffening? may he be stiffening? may we be stiffening? may you be stiffening? may they be stiffening?
Perfecto
may I have stiffened? may you have stiffened? may he have stiffened? may we have stiffened? may you have stiffened? may they have stiffened?
Perfecto con V-ing
may I have been stiffening? may you have been stiffening? may he have been stiffening? may we have been stiffening? may you have been stiffening? may they have been stiffening?
Forma interro-negativa
Forma simple
may I not stiffen? may you not stiffen? may he not stiffen? may we not stiffen? may you not stiffen? may they not stiffen?
Forma con V-ing
may I not be stiffening? may you not be stiffening? may he not be stiffening? may we not be stiffening? may you not be stiffening? may they not be stiffening?
Perfecto
may I not have stiffened? may you not have stiffened? may he not have stiffened? may we not have stiffened? may you not have stiffened? may they not have stiffened?
Perfecto con V-ing
may I not have been stiffening? may you not have been stiffening? may he not have been stiffening? may we not have been stiffening? may you not have been stiffening? may they not have been stiffening?