must certify
Regelmä&szlig;iges Verb: certify - certified- certified

Bestätigung 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I must certify
you must certify
he must certify
we must certify
you must certify
they must certify 	I must be certifying
you must be certifying
he must be certifying
we must be certifying
you must be certifying
they must be certifying	I must have certified
you must have certified
he must have certified
we must have certified
you must have certified
they must have certified	I must have been certifying
you must have been certifying
he must have been certifying
we must have been certifying
you must have been certifying
they must have been certifying	

Negation 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I mustn't certify
you mustn't certify
he mustn't certify
we mustn't certify
you mustn't certify
they mustn't certify 	I mustn't be certifying
you mustn't be certifying
he mustn't be certifying
we mustn't be certifying
you mustn't be certifying
they mustn't be certifying	I mustn't have certified
you mustn't have certified
he mustn't have certified
we mustn't have certified
you mustn't have certified
they mustn't have certified	I mustn't have been certifying
you mustn't have been certifying
he mustn't have been certifying
we mustn't have been certifying
you mustn't have been certifying
they mustn't have been certifying	

Fragende Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
must I certify?
must you certify?
must he certify?
must we certify?
must you certify?
must they certify? 	must I be certifying?
must you be certifying?
must he be certifying?
must we be certifying?
must you be certifying?
must they be certifying? 	must I have certified?
must you have certified?
must he have certified?
must we have certified?
must you have certified?
must they have certified? 	must I have been certifying?
must you have been certifying?
must he have been certifying?
must we have been certifying?
must you have been certifying?
must they have been certifying? 	

Fragende Negation Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
mustn't I certify?
mustn't you certify?
mustn't he certify?
mustn't we certify?
mustn't you certify?
mustn't they certify? 	mustn't I be certifying?
mustn't you be certifying?
mustn't he be certifying?
mustn't we be certifying?
mustn't you be certifying?
mustn't they be certifying? 	mustn't I have certified?
mustn't you have certified?
mustn't he have certified?
mustn't we have certified?
mustn't you have certified?
mustn't they have certified? 	mustn't I have been certifying?
mustn't you have been certifying?
mustn't he have been certifying?
mustn't we have been certifying?
mustn't you have been certifying?
mustn't they have been certifying?