Attention, ce verbe peut ne pas exister, la conjugaison est donnée à titre d'exemple.
Indicatif
Présent
don't I stiffer? don't you stiffer? doesn't he stiffer? don't we stiffer? don't you stiffer? don't they stiffer?
Présent continu
am I not stiffering? aren't you stiffering? isn't he stiffering? aren't we stiffering? aren't you stiffering? aren't they stiffering?
Prétérit
didn't I stiffer? didn't you stiffer? didn't he stiffer? didn't we stiffer? didn't you stiffer? didn't they stiffer?
Prétérit
wasn't I stiffering? weren't you stiffering? wasn't he stiffering? weren't we stiffering? weren't you stiffering? weren't they stiffering?
Present perfect
haven't I stiffered? haven't you stiffered? hasn't he stiffered? haven't we stiffered? haven't you stiffered? haven't they stiffered?
Present perfect continu
haven't I been stiffering? haven't you been stiffering? hasn't he been stiffering? haven't we been stiffering? haven't you been stiffering? haven't they been stiffering?
Pluperfect
hadn't I stiffered? hadn't you stiffered? hadn't he stiffered? hadn't we stiffered? hadn't you stiffered? hadn't they stiffered?
Pluperfect continu
hadn't I been stiffering? hadn't you been stiffering? hadn't he been stiffering? hadn't we been stiffering? hadn't you been stiffering? hadn't they been stiffering?
Futur
won't I stiffer? won't you stiffer? won't he stiffer? won't we stiffer? won't you stiffer? won't they stiffer?
Futur continu
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?
Futur antérieur
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?
Futur antérieur continu
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?
Conditionnel
Présent
wouldn't I stiffer? wouldn't you stiffer? wouldn't he stiffer? wouldn't we stiffer? wouldn't you stiffer? wouldn't they stiffer?
Présent continu
wouldn't I be stiffering? wouldn't you be stiffering? wouldn't he be stiffering? wouldn't we be stiffering? wouldn't you be stiffering? wouldn't they be stiffering?
Passé
wouldn't I have stiffered? wouldn't you have stiffered? wouldn't he have stiffered? wouldn't we have stiffered? wouldn't you have stiffered? wouldn't they have stiffered?
Passé continu
wouldn't I have been stiffering? wouldn't you have been stiffering? wouldn't he have been stiffering? wouldn't we have been stiffering? wouldn't you have been stiffering? wouldn't they have been stiffering?