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 must not retain
you must not retain
he must not retain
we must not retain
you must not retain
they must not retain 	I must not be retaining
you must not be retaining
he must not be retaining
we must not be retaining
you must not be retaining
they must not be retaining	I must not have retained
you must not have retained
he must not have retained
we must not have retained
you must not have retained
they must not have retained	I must not have been retaining
you must not have been retaining
he must not have been retaining
we must not have been retaining
you must not have been retaining
they must not 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 	
must I not retain?
must you not retain?
must he not retain?
must we not retain?
must you not retain?
must they not retain? 	must I not be retaining?
must you not be retaining?
must he not be retaining?
must we not be retaining?
must you not be retaining?
must they not be retaining? 	must I not have retained?
must you not have retained?
must he not have retained?
must we not have retained?
must you not have retained?
must they not have retained? 	must I not have been retaining?
must you not have been retaining?
must he not have been retaining?
must we not have been retaining?
must you not have been retaining?
must they not have been retaining?