must stiff
Regelmä&szlig;iges Verb: stiff - stiffed- stiffed

Bestätigung 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I must stiff
you must stiff
he must stiff
we must stiff
you must stiff
they must stiff 	I must be stiffing
you must be stiffing
he must be stiffing
we must be stiffing
you must be stiffing
they must be stiffing	I must have stiffed
you must have stiffed
he must have stiffed
we must have stiffed
you must have stiffed
they must have stiffed	I must have been stiffing
you must have been stiffing
he must have been stiffing
we must have been stiffing
you must have been stiffing
they must have been stiffing	

Negation 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I must not stiff
you must not stiff
he must not stiff
we must not stiff
you must not stiff
they must not stiff 	I must not be stiffing
you must not be stiffing
he must not be stiffing
we must not be stiffing
you must not be stiffing
they must not be stiffing	I must not have stiffed
you must not have stiffed
he must not have stiffed
we must not have stiffed
you must not have stiffed
they must not have stiffed	I must not have been stiffing
you must not have been stiffing
he must not have been stiffing
we must not have been stiffing
you must not have been stiffing
they must not have been stiffing	

Fragende Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
must I stiff?
must you stiff?
must he stiff?
must we stiff?
must you stiff?
must they stiff? 	must I be stiffing?
must you be stiffing?
must he be stiffing?
must we be stiffing?
must you be stiffing?
must they be stiffing? 	must I have stiffed?
must you have stiffed?
must he have stiffed?
must we have stiffed?
must you have stiffed?
must they have stiffed? 	must I have been stiffing?
must you have been stiffing?
must he have been stiffing?
must we have been stiffing?
must you have been stiffing?
must they have been stiffing? 	

Fragende Negation Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
must I not stiff?
must you not stiff?
must he not stiff?
must we not stiff?
must you not stiff?
must they not stiff? 	must I not be stiffing?
must you not be stiffing?
must he not be stiffing?
must we not be stiffing?
must you not be stiffing?
must they not be stiffing? 	must I not have stiffed?
must you not have stiffed?
must he not have stiffed?
must we not have stiffed?
must you not have stiffed?
must they not have stiffed? 	must I not have been stiffing?
must you not have been stiffing?
must he not have been stiffing?
must we not have been stiffing?
must you not have been stiffing?
must they not have been stiffing?