Cuidado, este verbo pode não existir, a conjugação é dada como exemplo.
Afirmação
Forma simple
I may stiffer you may stiffer she may stiffer we may stiffer you may stiffer they may stiffer
Forma com V-ing
I may be stiffering you may be stiffering she may be stiffering we may be stiffering you may be stiffering they may be stiffering
Perfeito
I may have stiffered you may have stiffered she may have stiffered we may have stiffered you may have stiffered they may have stiffered
Perfeito com V-ing
I may have been stiffering you may have been stiffering she may have been stiffering we may have been stiffering you may have been stiffering they may have been stiffering
Negação
Forma simple
I may not stiffer you may not stiffer she may not stiffer we may not stiffer you may not stiffer they may not stiffer
Forma com V-ing
I may not be stiffering you may not be stiffering she may not be stiffering we may not be stiffering you may not be stiffering they may not be stiffering
Perfeito
I may not have stiffered you may not have stiffered she may not have stiffered we may not have stiffered you may not have stiffered they may not have stiffered
Perfeito com V-ing
I may not have been stiffering you may not have been stiffering she may not have been stiffering we may not have been stiffering you may not have been stiffering they may not have been stiffering
Forma interrogativa
Forma simple
may I stiffer? may you stiffer? may she stiffer? may we stiffer? may you stiffer? may they stiffer?
Forma com V-ing
may I be stiffering? may you be stiffering? may she be stiffering? may we be stiffering? may you be stiffering? may they be stiffering?
Perfeito
may I have stiffered? may you have stiffered? may she have stiffered? may we have stiffered? may you have stiffered? may they have stiffered?
Perfeito com V-ing
may I have been stiffering? may you have been stiffering? may she have been stiffering? may we have been stiffering? may you have been stiffering? may they have been stiffering?
Forma interro-Negação
Forma simple
may I not stiffer? may you not stiffer? may she not stiffer? may we not stiffer? may you not stiffer? may they not stiffer?
Forma com V-ing
may I not be stiffering? may you not be stiffering? may she not be stiffering? may we not be stiffering? may you not be stiffering? may they not be stiffering?
Perfeito
may I not have stiffered? may you not have stiffered? may she not have stiffered? may we not have stiffered? may you not have stiffered? may they not have stiffered?
Perfeito com V-ing
may I not have been stiffering? may you not have been stiffering? may she not have been stiffering? may we not have been stiffering? may you not have been stiffering? may they not have been stiffering?