I must submerge you must submerge he must submerge we must submerge you must submerge they must submerge
Forme en V-ing
I must be submerging you must be submerging he must be submerging we must be submerging you must be submerging they must be submerging
Perfect
I must have submerged you must have submerged he must have submerged we must have submerged you must have submerged they must have submerged
Perfect en V-ing
I must have been submerging you must have been submerging he must have been submerging we must have been submerging you must have been submerging they must have been submerging
Négation
Forme simple
I mustn't submerge you mustn't submerge he mustn't submerge we mustn't submerge you mustn't submerge they mustn't submerge
Forme en V-ing
I mustn't be submerging you mustn't be submerging he mustn't be submerging we mustn't be submerging you mustn't be submerging they mustn't be submerging
Perfect
I mustn't have submerged you mustn't have submerged he mustn't have submerged we mustn't have submerged you mustn't have submerged they mustn't have submerged
Perfect en V-ing
I mustn't have been submerging you mustn't have been submerging he mustn't have been submerging we mustn't have been submerging you mustn't have been submerging they mustn't have been submerging
Forme interrogative
Forme simple
must I submerge? must you submerge? must he submerge? must we submerge? must you submerge? must they submerge?
Forme en V-ing
must I be submerging? must you be submerging? must he be submerging? must we be submerging? must you be submerging? must they be submerging?
Perfect
must I have submerged? must you have submerged? must he have submerged? must we have submerged? must you have submerged? must they have submerged?
Perfect en V-ing
must I have been submerging? must you have been submerging? must he have been submerging? must we have been submerging? must you have been submerging? must they have been submerging?
Forme interro-négative
Forme simple
mustn't I submerge? mustn't you submerge? mustn't he submerge? mustn't we submerge? mustn't you submerge? mustn't they submerge?
Forme en V-ing
mustn't I be submerging? mustn't you be submerging? mustn't he be submerging? mustn't we be submerging? mustn't you be submerging? mustn't they be submerging?
Perfect
mustn't I have submerged? mustn't you have submerged? mustn't he have submerged? mustn't we have submerged? mustn't you have submerged? mustn't they have submerged?
Perfect en V-ing
mustn't I have been submerging? mustn't you have been submerging? mustn't he have been submerging? mustn't we have been submerging? mustn't you have been submerging? mustn't they have been submerging?