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

Bestätigung 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I can stiffen
you can stiffen
he can stiffen
we can stiffen
you can stiffen
they can stiffen 	I can be stiffening
you can be stiffening
he can be stiffening
we can be stiffening
you can be stiffening
they can be stiffening	I can have stiffened
you can have stiffened
he can have stiffened
we can have stiffened
you can have stiffened
they can have stiffened	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	

Negation 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I can't stiffen
you can't stiffen
he can't stiffen
we can't stiffen
you can't stiffen
they can't stiffen 	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	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	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	

Fragende Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
can I stiffen?
can you stiffen?
can he stiffen?
can we stiffen?
can you stiffen?
can they stiffen? 	can I be stiffening?
can you be stiffening?
can he be stiffening?
can we be stiffening?
can you be stiffening?
can they be stiffening? 	can I have stiffened?
can you have stiffened?
can he have stiffened?
can we have stiffened?
can you have stiffened?
can they have stiffened? 	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? 	

Fragende Negation Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
can't I stiffen?
can't you stiffen?
can't he stiffen?
can't we stiffen?
can't you stiffen?
can't they stiffen? 	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? 	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? 	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?