I'll be stiffering you'll be stiffering he'll be stiffering we'll be stiffering you'll be stiffering they'll be stiffering
Perfect
I'll have stiffered you'll have stiffered he'll have stiffered we'll have stiffered you'll have stiffered they'll have stiffered
V-ing perfect
I'll have been stiffering you'll have been stiffering he'll have been stiffering we'll have been stiffering you'll have been stiffering they'll have been stiffering
Negation
Simple form
I won't stiffer you won't stiffer he won't stiffer we won't stiffer you won't stiffer they won't stiffer
V-ing form
I won't be stiffering you won't be stiffering he won't be stiffering we won't be stiffering you won't be stiffering they won't be stiffering
Perfect
I won't have stiffered you won't have stiffered he won't have stiffered we won't have stiffered you won't have stiffered they won't have stiffered
V-ing perfect
I won't have been stiffering you won't have been stiffering he won't have been stiffering we won't have been stiffering you won't have been stiffering they won't have been stiffering
Interrogative form
Simple form
will I stiffer? will you stiffer? will he stiffer? will we stiffer? will you stiffer? will they stiffer?
V-ing form
will I be stiffering? will you be stiffering? will he be stiffering? will we be stiffering? will you be stiffering? will they be stiffering?
Perfect
will I have stiffered? will you have stiffered? will he have stiffered? will we have stiffered? will you have stiffered? will they have stiffered?
V-ing perfect
will I have been stiffering? will you have been stiffering? will he have been stiffering? will we have been stiffering? will you have been stiffering? will they have been stiffering?
Interro-negative form
Simple form
won't I stiffer? won't you stiffer? won't he stiffer? won't we stiffer? won't you stiffer? won't they stiffer?
V-ing form
won't I be stiffering? won't you be stiffering? won't he be stiffering? won't we be stiffering? won't you be stiffering? won't they be stiffering?
Perfect
won't I have stiffered? won't you have stiffered? won't he have stiffered? won't we have stiffered? won't you have stiffered? won't they have stiffered?
V-ing perfect
won't I have been stiffering? won't you have been stiffering? won't he have been stiffering? won't we have been stiffering? won't you have been stiffering? won't they have been stiffering?