I must investigate you must investigate he must investigate we must investigate you must investigate they must investigate
Form mit V-ing
I must be investigating you must be investigating he must be investigating we must be investigating you must be investigating they must be investigating
Perfekt
I must have investigated you must have investigated he must have investigated we must have investigated you must have investigated they must have investigated
Perfekt mit V-ing
I must have been investigating you must have been investigating he must have been investigating we must have been investigating you must have been investigating they must have been investigating
Negation
Einfache Form
I mustn't investigate you mustn't investigate he mustn't investigate we mustn't investigate you mustn't investigate they mustn't investigate
Form mit V-ing
I mustn't be investigating you mustn't be investigating he mustn't be investigating we mustn't be investigating you mustn't be investigating they mustn't be investigating
Perfekt
I mustn't have investigated you mustn't have investigated he mustn't have investigated we mustn't have investigated you mustn't have investigated they mustn't have investigated
Perfekt mit V-ing
I mustn't have been investigating you mustn't have been investigating he mustn't have been investigating we mustn't have been investigating you mustn't have been investigating they mustn't have been investigating
Fragende Form
Einfache Form
must I investigate? must you investigate? must he investigate? must we investigate? must you investigate? must they investigate?
Form mit V-ing
must I be investigating? must you be investigating? must he be investigating? must we be investigating? must you be investigating? must they be investigating?
Perfekt
must I have investigated? must you have investigated? must he have investigated? must we have investigated? must you have investigated? must they have investigated?
Perfekt mit V-ing
must I have been investigating? must you have been investigating? must he have been investigating? must we have been investigating? must you have been investigating? must they have been investigating?
Fragende Negation Form
Einfache Form
mustn't I investigate? mustn't you investigate? mustn't he investigate? mustn't we investigate? mustn't you investigate? mustn't they investigate?
Form mit V-ing
mustn't I be investigating? mustn't you be investigating? mustn't he be investigating? mustn't we be investigating? mustn't you be investigating? mustn't they be investigating?
Perfekt
mustn't I have investigated? mustn't you have investigated? mustn't he have investigated? mustn't we have investigated? mustn't you have investigated? mustn't they have investigated?
Perfekt mit V-ing
mustn't I have been investigating? mustn't you have been investigating? mustn't he have been investigating? mustn't we have been investigating? mustn't you have been investigating? mustn't they have been investigating?