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

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

Negation 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I mustn't filter
you mustn't filter
she mustn't filter
we mustn't filter
you mustn't filter
they mustn't filter 	I mustn't be filtering
you mustn't be filtering
she mustn't be filtering
we mustn't be filtering
you mustn't be filtering
they mustn't be filtering	I mustn't have filtered
you mustn't have filtered
she mustn't have filtered
we mustn't have filtered
you mustn't have filtered
they mustn't have filtered	I mustn't have been filtering
you mustn't have been filtering
she mustn't have been filtering
we mustn't have been filtering
you mustn't have been filtering
they mustn't have been filtering	

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

Fragende Negation Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
mustn't I filter?
mustn't you filter?
mustn't she filter?
mustn't we filter?
mustn't you filter?
mustn't they filter? 	mustn't I be filtering?
mustn't you be filtering?
mustn't she be filtering?
mustn't we be filtering?
mustn't you be filtering?
mustn't they be filtering? 	mustn't I have filtered?
mustn't you have filtered?
mustn't she have filtered?
mustn't we have filtered?
mustn't you have filtered?
mustn't they have filtered? 	mustn't I have been filtering?
mustn't you have been filtering?
mustn't she have been filtering?
mustn't we have been filtering?
mustn't you have been filtering?
mustn't they have been filtering?