I must checker you must checker he must checker we must checker you must checker they must checker
Forme en V-ing
I must be checkering you must be checkering he must be checkering we must be checkering you must be checkering they must be checkering
Perfect
I must have checkered you must have checkered he must have checkered we must have checkered you must have checkered they must have checkered
Perfect en V-ing
I must have been checkering you must have been checkering he must have been checkering we must have been checkering you must have been checkering they must have been checkering
Négation
Forme simple
I must not checker you must not checker he must not checker we must not checker you must not checker they must not checker
Forme en V-ing
I must not be checkering you must not be checkering he must not be checkering we must not be checkering you must not be checkering they must not be checkering
Perfect
I must not have checkered you must not have checkered he must not have checkered we must not have checkered you must not have checkered they must not have checkered
Perfect en V-ing
I must not have been checkering you must not have been checkering he must not have been checkering we must not have been checkering you must not have been checkering they must not have been checkering
Forme interrogative
Forme simple
must I checker? must you checker? must he checker? must we checker? must you checker? must they checker?
Forme en V-ing
must I be checkering? must you be checkering? must he be checkering? must we be checkering? must you be checkering? must they be checkering?
Perfect
must I have checkered? must you have checkered? must he have checkered? must we have checkered? must you have checkered? must they have checkered?
Perfect en V-ing
must I have been checkering? must you have been checkering? must he have been checkering? must we have been checkering? must you have been checkering? must they have been checkering?
Forme interro-négative
Forme simple
must I not checker? must you not checker? must he not checker? must we not checker? must you not checker? must they not checker?
Forme en V-ing
must I not be checkering? must you not be checkering? must he not be checkering? must we not be checkering? must you not be checkering? must they not be checkering?
Perfect
must I not have checkered? must you not have checkered? must he not have checkered? must we not have checkered? must you not have checkered? must they not have checkered?
Perfect en V-ing
must I not have been checkering? must you not have been checkering? must he not have been checkering? must we not have been checkering? must you not have been checkering? must they not have been checkering?