Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I must whiter you must whiter she must whiter we must whiter you must whiter they must whiter
V-ing form
I must be whitering you must be whitering she must be whitering we must be whitering you must be whitering they must be whitering
Perfect
I must have whitered you must have whitered she must have whitered we must have whitered you must have whitered they must have whitered
V-ing perfect
I must have been whitering you must have been whitering she must have been whitering we must have been whitering you must have been whitering they must have been whitering
Negation
Simple form
I mustn't whiter you mustn't whiter she mustn't whiter we mustn't whiter you mustn't whiter they mustn't whiter
V-ing form
I mustn't be whitering you mustn't be whitering she mustn't be whitering we mustn't be whitering you mustn't be whitering they mustn't be whitering
Perfect
I mustn't have whitered you mustn't have whitered she mustn't have whitered we mustn't have whitered you mustn't have whitered they mustn't have whitered
V-ing perfect
I mustn't have been whitering you mustn't have been whitering she mustn't have been whitering we mustn't have been whitering you mustn't have been whitering they mustn't have been whitering
Interrogative form
Simple form
must I whiter? must you whiter? must she whiter? must we whiter? must you whiter? must they whiter?
V-ing form
must I be whitering? must you be whitering? must she be whitering? must we be whitering? must you be whitering? must they be whitering?
Perfect
must I have whitered? must you have whitered? must she have whitered? must we have whitered? must you have whitered? must they have whitered?
V-ing perfect
must I have been whitering? must you have been whitering? must she have been whitering? must we have been whitering? must you have been whitering? must they have been whitering?
Interro-negative form
Simple form
mustn't I whiter? mustn't you whiter? mustn't she whiter? mustn't we whiter? mustn't you whiter? mustn't they whiter?
V-ing form
mustn't I be whitering? mustn't you be whitering? mustn't she be whitering? mustn't we be whitering? mustn't you be whitering? mustn't they be whitering?
Perfect
mustn't I have whitered? mustn't you have whitered? mustn't she have whitered? mustn't we have whitered? mustn't you have whitered? mustn't they have whitered?
V-ing perfect
mustn't I have been whitering? mustn't you have been whitering? mustn't she have been whitering? mustn't we have been whitering? mustn't you have been whitering? mustn't they have been whitering?