
Regelmäßiges Verb: dull - dulled - dulled
Einfache Form | Form mit V-ing | 
| I must dull you must dull he must dull we must dull you must dull they must dull  | I must be dulling you must be dulling he must be dulling we must be dulling you must be dulling they must be dulling  | 
Perfekt | Perfekt mit V-ing | 
| I must have dulled you must have dulled he must have dulled we must have dulled you must have dulled they must have dulled  | I must have been dulling you must have been dulling he must have been dulling we must have been dulling you must have been dulling they must have been dulling  | 
Einfache Form | Form mit V-ing | 
| I mustn't dull you mustn't dull he mustn't dull we mustn't dull you mustn't dull they mustn't dull  | I mustn't be dulling you mustn't be dulling he mustn't be dulling we mustn't be dulling you mustn't be dulling they mustn't be dulling  | 
Perfekt | Perfekt mit V-ing | 
| I mustn't have dulled you mustn't have dulled he mustn't have dulled we mustn't have dulled you mustn't have dulled they mustn't have dulled  | I mustn't have been dulling you mustn't have been dulling he mustn't have been dulling we mustn't have been dulling you mustn't have been dulling they mustn't have been dulling  | 
Einfache Form | Form mit V-ing | 
| must I dull? must you dull? must he dull? must we dull? must you dull? must they dull?  | must I be dulling? must you be dulling? must he be dulling? must we be dulling? must you be dulling? must they be dulling?  | 
Perfekt | Perfekt mit V-ing | 
| must I have dulled? must you have dulled? must he have dulled? must we have dulled? must you have dulled? must they have dulled?  | must I have been dulling? must you have been dulling? must he have been dulling? must we have been dulling? must you have been dulling? must they have been dulling?  | 
Einfache Form | Form mit V-ing | 
| mustn't I dull? mustn't you dull? mustn't he dull? mustn't we dull? mustn't you dull? mustn't they dull?  | mustn't I be dulling? mustn't you be dulling? mustn't he be dulling? mustn't we be dulling? mustn't you be dulling? mustn't they be dulling?  | 
Perfekt | Perfekt mit V-ing | 
| mustn't I have dulled? mustn't you have dulled? mustn't he have dulled? mustn't we have dulled? mustn't you have dulled? mustn't they have dulled?  | mustn't I have been dulling? mustn't you have been dulling? mustn't he have been dulling? mustn't we have been dulling? mustn't you have been dulling? mustn't they have been dulling?  |