I must steer you must steer she must steer we must steer you must steer they must steer
V-ing form
I must be steering you must be steering she must be steering we must be steering you must be steering they must be steering
Perfect
I must have steered you must have steered she must have steered we must have steered you must have steered they must have steered
V-ing perfect
I must have been steering you must have been steering she must have been steering we must have been steering you must have been steering they must have been steering
Negation
Simple form
I must not steer you must not steer she must not steer we must not steer you must not steer they must not steer
V-ing form
I must not be steering you must not be steering she must not be steering we must not be steering you must not be steering they must not be steering
Perfect
I must not have steered you must not have steered she must not have steered we must not have steered you must not have steered they must not have steered
V-ing perfect
I must not have been steering you must not have been steering she must not have been steering we must not have been steering you must not have been steering they must not have been steering
Interrogative form
Simple form
must I steer? must you steer? must she steer? must we steer? must you steer? must they steer?
V-ing form
must I be steering? must you be steering? must she be steering? must we be steering? must you be steering? must they be steering?
Perfect
must I have steered? must you have steered? must she have steered? must we have steered? must you have steered? must they have steered?
V-ing perfect
must I have been steering? must you have been steering? must she have been steering? must we have been steering? must you have been steering? must they have been steering?
Interro-negative form
Simple form
must I not steer? must you not steer? must she not steer? must we not steer? must you not steer? must they not steer?
V-ing form
must I not be steering? must you not be steering? must she not be steering? must we not be steering? must you not be steering? must they not be steering?
Perfect
must I not have steered? must you not have steered? must she not have steered? must we not have steered? must you not have steered? must they not have steered?
V-ing perfect
must I not have been steering? must you not have been steering? must she not have been steering? must we not have been steering? must you not have been steering? must they not have been steering?