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