could refer
Regelmä&szlig;iges Verb: refer - referred- referred

Bestätigung 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I could refer
you could refer
he could refer
we could refer
you could refer
they could refer 	I could be referring
you could be referring
he could be referring
we could be referring
you could be referring
they could be referring	I could have referred
you could have referred
he could have referred
we could have referred
you could have referred
they could have referred	I could have been referring
you could have been referring
he could have been referring
we could have been referring
you could have been referring
they could have been referring	

Negation 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I couldn't refer
you couldn't refer
he couldn't refer
we couldn't refer
you couldn't refer
they couldn't refer 	I couldn't be referring
you couldn't be referring
he couldn't be referring
we couldn't be referring
you couldn't be referring
they couldn't be referring	I couldn't have referred
you couldn't have referred
he couldn't have referred
we couldn't have referred
you couldn't have referred
they couldn't have referred	I couldn't have been referring
you couldn't have been referring
he couldn't have been referring
we couldn't have been referring
you couldn't have been referring
they couldn't have been referring	

Fragende Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
could I refer?
could you refer?
could he refer?
could we refer?
could you refer?
could they refer? 	could I be referring?
could you be referring?
could he be referring?
could we be referring?
could you be referring?
could they be referring? 	could I have referred?
could you have referred?
could he have referred?
could we have referred?
could you have referred?
could they have referred? 	could I have been referring?
could you have been referring?
could he have been referring?
could we have been referring?
could you have been referring?
could they have been referring? 	

Fragende Negation Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
couldn't I refer?
couldn't you refer?
couldn't he refer?
couldn't we refer?
couldn't you refer?
couldn't they refer? 	couldn't I be referring?
couldn't you be referring?
couldn't he be referring?
couldn't we be referring?
couldn't you be referring?
couldn't they be referring? 	couldn't I have referred?
couldn't you have referred?
couldn't he have referred?
couldn't we have referred?
couldn't you have referred?
couldn't they have referred? 	couldn't I have been referring?
couldn't you have been referring?
couldn't he have been referring?
couldn't we have been referring?
couldn't you have been referring?
couldn't they have been referring?