must retain
Regelmä&szlig;iges Verb: retain - retained- retained

Bestätigung 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I must retain
you must retain
he must retain
we must retain
you must retain
they must retain 	I must be retaining
you must be retaining
he must be retaining
we must be retaining
you must be retaining
they must be retaining	I must have retained
you must have retained
he must have retained
we must have retained
you must have retained
they must have retained	I must have been retaining
you must have been retaining
he must have been retaining
we must have been retaining
you must have been retaining
they must have been retaining	

Negation 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I mustn't retain
you mustn't retain
he mustn't retain
we mustn't retain
you mustn't retain
they mustn't retain 	I mustn't be retaining
you mustn't be retaining
he mustn't be retaining
we mustn't be retaining
you mustn't be retaining
they mustn't be retaining	I mustn't have retained
you mustn't have retained
he mustn't have retained
we mustn't have retained
you mustn't have retained
they mustn't have retained	I mustn't have been retaining
you mustn't have been retaining
he mustn't have been retaining
we mustn't have been retaining
you mustn't have been retaining
they mustn't have been retaining	

Fragende Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
must I retain?
must you retain?
must he retain?
must we retain?
must you retain?
must they retain? 	must I be retaining?
must you be retaining?
must he be retaining?
must we be retaining?
must you be retaining?
must they be retaining? 	must I have retained?
must you have retained?
must he have retained?
must we have retained?
must you have retained?
must they have retained? 	must I have been retaining?
must you have been retaining?
must he have been retaining?
must we have been retaining?
must you have been retaining?
must they have been retaining? 	

Fragende Negation Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
mustn't I retain?
mustn't you retain?
mustn't he retain?
mustn't we retain?
mustn't you retain?
mustn't they retain? 	mustn't I be retaining?
mustn't you be retaining?
mustn't he be retaining?
mustn't we be retaining?
mustn't you be retaining?
mustn't they be retaining? 	mustn't I have retained?
mustn't you have retained?
mustn't he have retained?
mustn't we have retained?
mustn't you have retained?
mustn't they have retained? 	mustn't I have been retaining?
mustn't you have been retaining?
mustn't he have been retaining?
mustn't we have been retaining?
mustn't you have been retaining?
mustn't they have been retaining?