I can stiffen you can stiffen he can stiffen we can stiffen you can stiffen they can stiffen
Forma con V-ing
I can be stiffening you can be stiffening he can be stiffening we can be stiffening you can be stiffening they can be stiffening
Perfetto
I can have stiffened you can have stiffened he can have stiffened we can have stiffened you can have stiffened they can have stiffened
Perfetto con V-ing
I can have been stiffening you can have been stiffening he can have been stiffening we can have been stiffening you can have been stiffening they can have been stiffening
Negazione
Forma semplice
I can't stiffen you can't stiffen he can't stiffen we can't stiffen you can't stiffen they can't stiffen
Forma con V-ing
I can't be stiffening you can't be stiffening he can't be stiffening we can't be stiffening you can't be stiffening they can't be stiffening
Perfetto
I can't have stiffened you can't have stiffened he can't have stiffened we can't have stiffened you can't have stiffened they can't have stiffened
Perfetto con V-ing
I can't have been stiffening you can't have been stiffening he can't have been stiffening we can't have been stiffening you can't have been stiffening they can't have been stiffening
Forma interrogativa
Forma semplice
can I stiffen? can you stiffen? can he stiffen? can we stiffen? can you stiffen? can they stiffen?
Forma con V-ing
can I be stiffening? can you be stiffening? can he be stiffening? can we be stiffening? can you be stiffening? can they be stiffening?
Perfetto
can I have stiffened? can you have stiffened? can he have stiffened? can we have stiffened? can you have stiffened? can they have stiffened?
Perfetto con V-ing
can I have been stiffening? can you have been stiffening? can he have been stiffening? can we have been stiffening? can you have been stiffening? can they have been stiffening?
Forma interro-negativa
Forma semplice
can't I stiffen? can't you stiffen? can't he stiffen? can't we stiffen? can't you stiffen? can't they stiffen?
Forma con V-ing
can't I be stiffening? can't you be stiffening? can't he be stiffening? can't we be stiffening? can't you be stiffening? can't they be stiffening?
Perfetto
can't I have stiffened? can't you have stiffened? can't he have stiffened? can't we have stiffened? can't you have stiffened? can't they have stiffened?
Perfetto con V-ing
can't I have been stiffening? can't you have been stiffening? can't he have been stiffening? can't we have been stiffening? can't you have been stiffening? can't they have been stiffening?