I must concertina you must concertina he must concertina we must concertina you must concertina they must concertina
Forme en V-ing
I must be concertinaing you must be concertinaing he must be concertinaing we must be concertinaing you must be concertinaing they must be concertinaing
Perfect
I must have concertinaed you must have concertinaed he must have concertinaed we must have concertinaed you must have concertinaed they must have concertinaed
Perfect en V-ing
I must have been concertinaing you must have been concertinaing he must have been concertinaing we must have been concertinaing you must have been concertinaing they must have been concertinaing
Négation
Forme simple
I must not concertina you must not concertina he must not concertina we must not concertina you must not concertina they must not concertina
Forme en V-ing
I must not be concertinaing you must not be concertinaing he must not be concertinaing we must not be concertinaing you must not be concertinaing they must not be concertinaing
Perfect
I must not have concertinaed you must not have concertinaed he must not have concertinaed we must not have concertinaed you must not have concertinaed they must not have concertinaed
Perfect en V-ing
I must not have been concertinaing you must not have been concertinaing he must not have been concertinaing we must not have been concertinaing you must not have been concertinaing they must not have been concertinaing
Forme interrogative
Forme simple
must I concertina? must you concertina? must he concertina? must we concertina? must you concertina? must they concertina?
Forme en V-ing
must I be concertinaing? must you be concertinaing? must he be concertinaing? must we be concertinaing? must you be concertinaing? must they be concertinaing?
Perfect
must I have concertinaed? must you have concertinaed? must he have concertinaed? must we have concertinaed? must you have concertinaed? must they have concertinaed?
Perfect en V-ing
must I have been concertinaing? must you have been concertinaing? must he have been concertinaing? must we have been concertinaing? must you have been concertinaing? must they have been concertinaing?
Forme interro-négative
Forme simple
must I not concertina? must you not concertina? must he not concertina? must we not concertina? must you not concertina? must they not concertina?
Forme en V-ing
must I not be concertinaing? must you not be concertinaing? must he not be concertinaing? must we not be concertinaing? must you not be concertinaing? must they not be concertinaing?
Perfect
must I not have concertinaed? must you not have concertinaed? must he not have concertinaed? must we not have concertinaed? must you not have concertinaed? must they not have concertinaed?
Perfect en V-ing
must I not have been concertinaing? must you not have been concertinaing? must he not have been concertinaing? must we not have been concertinaing? must you not have been concertinaing? must they not have been concertinaing?