could filter
Regelmä&szlig;iges Verb: filter - filtered- filtered

Bestätigung 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I could filter
you could filter
he could filter
we could filter
you could filter
they could filter 	I could be filtering
you could be filtering
he could be filtering
we could be filtering
you could be filtering
they could be filtering	I could have filtered
you could have filtered
he could have filtered
we could have filtered
you could have filtered
they could have filtered	I could have been filtering
you could have been filtering
he could have been filtering
we could have been filtering
you could have been filtering
they could have been filtering	

Negation 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I could not filter
you could not filter
he could not filter
we could not filter
you could not filter
they could not filter 	I could not be filtering
you could not be filtering
he could not be filtering
we could not be filtering
you could not be filtering
they could not be filtering	I could not have filtered
you could not have filtered
he could not have filtered
we could not have filtered
you could not have filtered
they could not have filtered	I could not have been filtering
you could not have been filtering
he could not have been filtering
we could not have been filtering
you could not have been filtering
they could not have been filtering	

Fragende Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
could I filter?
could you filter?
could he filter?
could we filter?
could you filter?
could they filter? 	could I be filtering?
could you be filtering?
could he be filtering?
could we be filtering?
could you be filtering?
could they be filtering? 	could I have filtered?
could you have filtered?
could he have filtered?
could we have filtered?
could you have filtered?
could they have filtered? 	could I have been filtering?
could you have been filtering?
could he have been filtering?
could we have been filtering?
could you have been filtering?
could they have been filtering? 	

Fragende Negation Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
could I not filter?
could you not filter?
could he not filter?
could we not filter?
could you not filter?
could they not filter? 	could I not be filtering?
could you not be filtering?
could he not be filtering?
could we not be filtering?
could you not be filtering?
could they not be filtering? 	could I not have filtered?
could you not have filtered?
could he not have filtered?
could we not have filtered?
could you not have filtered?
could they not have filtered? 	could I not have been filtering?
could you not have been filtering?
could he not have been filtering?
could we not have been filtering?
could you not have been filtering?
could they not have been filtering?