Atención, este verbo puede no existir, se da como ejemplo la conjugación.
Afirmación
Forma simple
I may stiffer you may stiffer she may stiffer we may stiffer you may stiffer they may stiffer
Forma con 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
Perfecto
I may have stiffered you may have stiffered she may have stiffered we may have stiffered you may have stiffered they may have stiffered
Perfecto con 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
Negación
Forma simple
I mayn't stiffer you mayn't stiffer she mayn't stiffer we mayn't stiffer you mayn't stiffer they mayn't stiffer
Forma con V-ing
I mayn't be stiffering you mayn't be stiffering she mayn't be stiffering we mayn't be stiffering you mayn't be stiffering they mayn't be stiffering
Perfecto
I mayn't have stiffered you mayn't have stiffered she mayn't have stiffered we mayn't have stiffered you mayn't have stiffered they mayn't have stiffered
Perfecto con V-ing
I mayn't have been stiffering you mayn't have been stiffering she mayn't have been stiffering we mayn't have been stiffering you mayn't have been stiffering they mayn't 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 con 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?
Perfecto
may I have stiffered? may you have stiffered? may she have stiffered? may we have stiffered? may you have stiffered? may they have stiffered?
Perfecto con 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-negativa
Forma simple
mayn't I stiffer? mayn't you stiffer? mayn't she stiffer? mayn't we stiffer? mayn't you stiffer? mayn't they stiffer?
Forma con V-ing
mayn't I be stiffering? mayn't you be stiffering? mayn't she be stiffering? mayn't we be stiffering? mayn't you be stiffering? mayn't they be stiffering?
Perfecto
mayn't I have stiffered? mayn't you have stiffered? mayn't she have stiffered? mayn't we have stiffered? mayn't you have stiffered? mayn't they have stiffered?
Perfecto con V-ing
mayn't I have been stiffering? mayn't you have been stiffering? mayn't she have been stiffering? mayn't we have been stiffering? mayn't you have been stiffering? mayn't they have been stiffering?