can toughen
Regelmä&szlig;iges Verb: toughen - toughened- toughened

Bestätigung 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I can toughen
you can toughen
he can toughen
we can toughen
you can toughen
they can toughen 	I can be toughening
you can be toughening
he can be toughening
we can be toughening
you can be toughening
they can be toughening	I can have toughened
you can have toughened
he can have toughened
we can have toughened
you can have toughened
they can have toughened	I can have been toughening
you can have been toughening
he can have been toughening
we can have been toughening
you can have been toughening
they can have been toughening	

Negation 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I can't toughen
you can't toughen
he can't toughen
we can't toughen
you can't toughen
they can't toughen 	I can't be toughening
you can't be toughening
he can't be toughening
we can't be toughening
you can't be toughening
they can't be toughening	I can't have toughened
you can't have toughened
he can't have toughened
we can't have toughened
you can't have toughened
they can't have toughened	I can't have been toughening
you can't have been toughening
he can't have been toughening
we can't have been toughening
you can't have been toughening
they can't have been toughening	

Fragende Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
can I toughen?
can you toughen?
can he toughen?
can we toughen?
can you toughen?
can they toughen? 	can I be toughening?
can you be toughening?
can he be toughening?
can we be toughening?
can you be toughening?
can they be toughening? 	can I have toughened?
can you have toughened?
can he have toughened?
can we have toughened?
can you have toughened?
can they have toughened? 	can I have been toughening?
can you have been toughening?
can he have been toughening?
can we have been toughening?
can you have been toughening?
can they have been toughening? 	

Fragende Negation Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
can't I toughen?
can't you toughen?
can't he toughen?
can't we toughen?
can't you toughen?
can't they toughen? 	can't I be toughening?
can't you be toughening?
can't he be toughening?
can't we be toughening?
can't you be toughening?
can't they be toughening? 	can't I have toughened?
can't you have toughened?
can't he have toughened?
can't we have toughened?
can't you have toughened?
can't they have toughened? 	can't I have been toughening?
can't you have been toughening?
can't he have been toughening?
can't we have been toughening?
can't you have been toughening?
can't they have been toughening?