must lengthen
Regelmä&szlig;iges Verb: lengthen - lengthened- lengthened

Bestätigung 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I must lengthen
you must lengthen
he must lengthen
we must lengthen
you must lengthen
they must lengthen 	I must be lengthening
you must be lengthening
he must be lengthening
we must be lengthening
you must be lengthening
they must be lengthening	I must have lengthened
you must have lengthened
he must have lengthened
we must have lengthened
you must have lengthened
they must have lengthened	I must have been lengthening
you must have been lengthening
he must have been lengthening
we must have been lengthening
you must have been lengthening
they must have been lengthening	

Negation 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I mustn't lengthen
you mustn't lengthen
he mustn't lengthen
we mustn't lengthen
you mustn't lengthen
they mustn't lengthen 	I mustn't be lengthening
you mustn't be lengthening
he mustn't be lengthening
we mustn't be lengthening
you mustn't be lengthening
they mustn't be lengthening	I mustn't have lengthened
you mustn't have lengthened
he mustn't have lengthened
we mustn't have lengthened
you mustn't have lengthened
they mustn't have lengthened	I mustn't have been lengthening
you mustn't have been lengthening
he mustn't have been lengthening
we mustn't have been lengthening
you mustn't have been lengthening
they mustn't have been lengthening	

Fragende Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
must I lengthen?
must you lengthen?
must he lengthen?
must we lengthen?
must you lengthen?
must they lengthen? 	must I be lengthening?
must you be lengthening?
must he be lengthening?
must we be lengthening?
must you be lengthening?
must they be lengthening? 	must I have lengthened?
must you have lengthened?
must he have lengthened?
must we have lengthened?
must you have lengthened?
must they have lengthened? 	must I have been lengthening?
must you have been lengthening?
must he have been lengthening?
must we have been lengthening?
must you have been lengthening?
must they have been lengthening? 	

Fragende Negation Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
mustn't I lengthen?
mustn't you lengthen?
mustn't he lengthen?
mustn't we lengthen?
mustn't you lengthen?
mustn't they lengthen? 	mustn't I be lengthening?
mustn't you be lengthening?
mustn't he be lengthening?
mustn't we be lengthening?
mustn't you be lengthening?
mustn't they be lengthening? 	mustn't I have lengthened?
mustn't you have lengthened?
mustn't he have lengthened?
mustn't we have lengthened?
mustn't you have lengthened?
mustn't they have lengthened? 	mustn't I have been lengthening?
mustn't you have been lengthening?
mustn't he have been lengthening?
mustn't we have been lengthening?
mustn't you have been lengthening?
mustn't they have been lengthening?