could biff
Regelmä&szlig;iges Verb: biff - biffed- biffed

Bestätigung 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I could biff
you could biff
he could biff
we could biff
you could biff
they could biff 	I could be biffing
you could be biffing
he could be biffing
we could be biffing
you could be biffing
they could be biffing	I could have biffed
you could have biffed
he could have biffed
we could have biffed
you could have biffed
they could have biffed	I could have been biffing
you could have been biffing
he could have been biffing
we could have been biffing
you could have been biffing
they could have been biffing	

Negation 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I couldn't biff
you couldn't biff
he couldn't biff
we couldn't biff
you couldn't biff
they couldn't biff 	I couldn't be biffing
you couldn't be biffing
he couldn't be biffing
we couldn't be biffing
you couldn't be biffing
they couldn't be biffing	I couldn't have biffed
you couldn't have biffed
he couldn't have biffed
we couldn't have biffed
you couldn't have biffed
they couldn't have biffed	I couldn't have been biffing
you couldn't have been biffing
he couldn't have been biffing
we couldn't have been biffing
you couldn't have been biffing
they couldn't have been biffing	

Fragende Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
could I biff?
could you biff?
could he biff?
could we biff?
could you biff?
could they biff? 	could I be biffing?
could you be biffing?
could he be biffing?
could we be biffing?
could you be biffing?
could they be biffing? 	could I have biffed?
could you have biffed?
could he have biffed?
could we have biffed?
could you have biffed?
could they have biffed? 	could I have been biffing?
could you have been biffing?
could he have been biffing?
could we have been biffing?
could you have been biffing?
could they have been biffing? 	

Fragende Negation Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
couldn't I biff?
couldn't you biff?
couldn't he biff?
couldn't we biff?
couldn't you biff?
couldn't they biff? 	couldn't I be biffing?
couldn't you be biffing?
couldn't he be biffing?
couldn't we be biffing?
couldn't you be biffing?
couldn't they be biffing? 	couldn't I have biffed?
couldn't you have biffed?
couldn't he have biffed?
couldn't we have biffed?
couldn't you have biffed?
couldn't they have biffed? 	couldn't I have been biffing?
couldn't you have been biffing?
couldn't he have been biffing?
couldn't we have been biffing?
couldn't you have been biffing?
couldn't they have been biffing?