should stiffen
Regelmä&szlig;iges Verb: stiffen - stiffened- stiffened

Bestätigung 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I'd stiffen
you'd stiffen
she'd stiffen
we'd stiffen
you'd stiffen
they'd stiffen 	I'd be stiffening
you'd be stiffening
she'd be stiffening
we'd be stiffening
you'd be stiffening
they'd be stiffening	I should've stiffened
you should've stiffened
she should've stiffened
we should've stiffened
you should've stiffened
they should've stiffened	I should've been stiffening
you should've been stiffening
she should've been stiffening
we should've been stiffening
you should've been stiffening
they should've been stiffening	

Negation 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I shouldn't stiffen
you shouldn't stiffen
she shouldn't stiffen
we shouldn't stiffen
you shouldn't stiffen
they shouldn't stiffen 	I shouldn't be stiffening
you shouldn't be stiffening
she shouldn't be stiffening
we shouldn't be stiffening
you shouldn't be stiffening
they shouldn't be stiffening	I shouldn't have stiffened
you shouldn't have stiffened
she shouldn't have stiffened
we shouldn't have stiffened
you shouldn't have stiffened
they shouldn't have stiffened	I shouldn't have been stiffening
you shouldn't have been stiffening
she shouldn't have been stiffening
we shouldn't have been stiffening
you shouldn't have been stiffening
they shouldn't have been stiffening	

Fragende Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
should I stiffen?
should you stiffen?
should she stiffen?
should we stiffen?
should you stiffen?
should they stiffen? 	should I be stiffening?
should you be stiffening?
should she be stiffening?
should we be stiffening?
should you be stiffening?
should they be stiffening? 	should I have stiffened?
should you have stiffened?
should she have stiffened?
should we have stiffened?
should you have stiffened?
should they have stiffened? 	should I have been stiffening?
should you have been stiffening?
should she have been stiffening?
should we have been stiffening?
should you have been stiffening?
should they have been stiffening? 	

Fragende Negation Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
shouldn't I stiffen?
shouldn't you stiffen?
shouldn't she stiffen?
shouldn't we stiffen?
shouldn't you stiffen?
shouldn't they stiffen? 	shouldn't I be stiffening?
shouldn't you be stiffening?
shouldn't she be stiffening?
shouldn't we be stiffening?
shouldn't you be stiffening?
shouldn't they be stiffening? 	shouldn't I have stiffened?
shouldn't you have stiffened?
shouldn't she have stiffened?
shouldn't we have stiffened?
shouldn't you have stiffened?
shouldn't they have stiffened? 	shouldn't I have been stiffening?
shouldn't you have been stiffening?
shouldn't she have been stiffening?
shouldn't we have been stiffening?
shouldn't you have been stiffening?
shouldn't they have been stiffening?