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