must whistle
Regelmä&szlig;iges Verb: whistle - whistled- whistled

Bestätigung 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I must whistle
you must whistle
he must whistle
we must whistle
you must whistle
they must whistle 	I must be whistling
you must be whistling
he must be whistling
we must be whistling
you must be whistling
they must be whistling	I must have whistled
you must have whistled
he must have whistled
we must have whistled
you must have whistled
they must have whistled	I must have been whistling
you must have been whistling
he must have been whistling
we must have been whistling
you must have been whistling
they must have been whistling	

Negation 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I mustn't whistle
you mustn't whistle
he mustn't whistle
we mustn't whistle
you mustn't whistle
they mustn't whistle 	I mustn't be whistling
you mustn't be whistling
he mustn't be whistling
we mustn't be whistling
you mustn't be whistling
they mustn't be whistling	I mustn't have whistled
you mustn't have whistled
he mustn't have whistled
we mustn't have whistled
you mustn't have whistled
they mustn't have whistled	I mustn't have been whistling
you mustn't have been whistling
he mustn't have been whistling
we mustn't have been whistling
you mustn't have been whistling
they mustn't have been whistling	

Fragende Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
must I whistle?
must you whistle?
must he whistle?
must we whistle?
must you whistle?
must they whistle? 	must I be whistling?
must you be whistling?
must he be whistling?
must we be whistling?
must you be whistling?
must they be whistling? 	must I have whistled?
must you have whistled?
must he have whistled?
must we have whistled?
must you have whistled?
must they have whistled? 	must I have been whistling?
must you have been whistling?
must he have been whistling?
must we have been whistling?
must you have been whistling?
must they have been whistling? 	

Fragende Negation Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
mustn't I whistle?
mustn't you whistle?
mustn't he whistle?
mustn't we whistle?
mustn't you whistle?
mustn't they whistle? 	mustn't I be whistling?
mustn't you be whistling?
mustn't he be whistling?
mustn't we be whistling?
mustn't you be whistling?
mustn't they be whistling? 	mustn't I have whistled?
mustn't you have whistled?
mustn't he have whistled?
mustn't we have whistled?
mustn't you have whistled?
mustn't they have whistled? 	mustn't I have been whistling?
mustn't you have been whistling?
mustn't he have been whistling?
mustn't we have been whistling?
mustn't you have been whistling?
mustn't they have been whistling?