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